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Oracle Active Data Guard 12cR2. Is it the best option?

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Ludovico Caldara
Ludovico Caldara

The document discusses Oracle Active Data Guard 12cR2, evaluating its effectiveness as a high availability solution within the Oracle ecosystem. It highlights features such as real-time query, automatic block repair, and advanced topologies that support various configurations. Additionally, the presentation reviews costs associated with its use and ongoing relevance in modern IT environments.

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Oracle Active Data Guard 12cR2 Is it the best option? Ludovico Caldara Oracle ACE Director Senior Consultant @ ludodba DOAG2017
About Ludovico Caldara Oracle Active Data Guard 12cR2. Is it the best option?2 12/2/2017 ■ 18 Years DBA (Not Only Oracle) ▪ I do it everywhere (even Windows) ■ RAC ATTACK Ninja & co-writer ■ President, SOUG & ITOUG Board ■ OCP (11g, 12c, MySQL) & OCE ■ Italian living in Switzerland ■ http://www.ludovicocaldara.net ■ @ludodba ludodba ■ ludovicocaldara
Our company. Oracle Active Data Guard 12cR2. Is it the best option?3 12/2/2017 Trivadis is a market leader in IT consulting, system integration, solution engineering and the provision of IT services focusing on and technologies in Switzerland, Germany, Austria and Denmark. We offer our services in the following strategic business fields: Trivadis Services takes over the interactive operation of your IT systems. O P E R A T I O N
COPENHAGEN MUNICH LAUSANNE BERN ZURICH BRUGG GENEVA HAMBURG DÜSSELDORF FRANKFURT STUTTGART FREIBURG BASEL VIENNA With over 600 specialists and IT experts in your region. Oracle Active Data Guard 12cR2. Is it the best option?4 12/2/2017 14 Trivadis branches and more than 600 employees 200 Service Level Agreements Over 4,000 training participants Research and development budget: CHF 5.0 / EUR 4 million Financially self-supporting and sustainably profitable Experience from more than 1,900 projects per year at over 800 customers
My experiences with German Oracle Active Data Guard 12cR2. Is it the best option?5 12/2/2017 Ich möchte ein Bier, bitte!
My experiences with German Oracle Active Data Guard 12cR2. Is it the best option?6 12/2/2017 Es ist nicht ein Problem mit der Datenbank
Duolingo level 3! Oracle Active Data Guard 12cR2. Is it the best option?7 12/2/2017
Duolingo level 3! Oracle Active Data Guard 12cR2. Is it the best option?8 12/2/2017 Die Suppe ist schlect.
Duolingo level 3! Oracle Active Data Guard 12cR2. Is it the best option?9 12/2/2017 Die Suppe ist schlect. Können Sie bitte aufhören, Rapport-Anfragen auf den Produktionsdatenbanken zu erstellen? Sie verlangsamen unser Geschäft.
Oracle Active Data Guard 12cR2. Is it the best option?10 12/2/2017 Oracle Data Guard?
Why is Oracle Data Guard still relevant? Oracle Active Data Guard 12cR2. Is it the best option?11 12/2/2017 The best high availability solution in the Oracle ecosystem – Synchronous (or not) – One-to-one copy (or one-to-many) – No single points of failure – Failover is (almost) transparent to the applications (if well configured) Rock solid! Included in Oracle Database Enterprise Edition
Oracle Active Data Guard 12cR2. Is it the best option?12 12/2/2017 Active Data Guard?
Agenda… or which features I will try to cover Oracle Active Data Guard 12cR2. Is it the best option?13 12/2/2017 Real-time Query Automatic Block Repair Fast Incremental Backup on Standby Advanced topologies (Real-time Cascading Standby, Far Sync Standby, Alternate destinations) Application Continuity Rolling Upgrades Global Data Services Subset Standby Multiple Instance Redo Apply
Agenda… or which features I will try to cover Oracle Active Data Guard 12cR2. Is it the best option?14 12/2/2017 Real-time Query Automatic Block Repair Fast Incremental Backup on Standby Advanced topologies (Real-time Cascading Standby, Far Sync Standby, Alternate destinations) Application Continuity Rolling Upgrades Global Data Services Subset Standby Multiple Instance Redo Apply We are talking about extra-cost features!
Oracle Active Data Guard 12cR2. Is it the best option?15 12/2/2017 Real-time Query (11g)
Without Real-Time Query Oracle Active Data Guard 12cR2. Is it the best option?16 12/2/2017 sour_ludo sour_vico sour_RW CLIENTS MRP0
With Real-Time Query Oracle Active Data Guard 12cR2. Is it the best option?17 12/2/2017 sour_ludo sour_vico sour_RW CLIENTS MRP0 sour_RO UPDATES READS SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL; SQL> ALTER DATABASE OPEN; SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT;
Real-Time Query use case: reader farms Oracle Active Data Guard 12cR2. Is it the best option?18 12/2/2017 PRIMARY REP1 REP2 REP3 REP4 REP5 REP6 UPDATES READS
Real-Time Query: Support for GTTs Oracle Active Data Guard 12cR2. Is it the best option?19 12/2/2017 UNDO TBS TEMP TBS TEMP_UNDO_ENABLED = TRUE GLOBAL TEMPORARY TABLE DATA TBS SYSTEM TBS DATA & UNDONew in 12c
Real-Time Query: Support for sequences Oracle Active Data Guard 12cR2. Is it the best option?20 12/2/2017 ASKS FOR A SET OF USABLE SEQUENCES PRIMARY STANDBYNew in 12c It works only if CACHE and NOORDER are set It does not work on cascade standbys
Take Away Oracle Active Data Guard 12cR2. Is it the best option?21 12/2/2017 You already pay Enterprise Licenses for the Primary and the Stanby 8CPUs8CPUs APP Writes Non Off-loadable Reads Off-loadable (non-critical) Reads 380K$
Take Away Oracle Active Data Guard 12cR2. Is it the best option?22 12/2/2017 You already pay Enterprise Licenses for the Primary and the Stanby 8CPUs8CPUs APP Writes Non Off-loadable Reads Off-loadable (non-critical) Reads 4CPUs4CPUs 380K$ 236K$
Take Away Oracle Active Data Guard 12cR2. Is it the best option?23 12/2/2017 You already pay Enterprise Licenses for the Primary and the Stanby 8CPUs8CPUs APP Writes Non Off-loadable Reads Off-loadable (non-critical) Reads 4CPUs4CPUs 4CPUs4CPUs 4CPUs 380K$ 354K$ 236K$
Take Away Oracle Active Data Guard 12cR2. Is it the best option?24 12/2/2017
Oracle Active Data Guard 12cR2. Is it the best option?25 12/2/2017 Automatic Block Repair
Corrupted Blocks on Primary Oracle Active Data Guard 12cR2. Is it the best option?26 12/2/2017 sour_ludo sour_vico sour_RW CLIENTS MRP0 sour_RO CORRUPT BLOCK!
Corrupted Blocks on Primary Oracle Active Data Guard 12cR2. Is it the best option?27 12/2/2017 sour_ludo sour_vico sour_RW CLIENTS MRP0 sour_RO AUTOMATICALLY FIND THE GOOD COPY
Corrupted Blocks on Primary Oracle Active Data Guard 12cR2. Is it the best option?28 12/2/2017 sour_ludo sour_vico sour_RW CLIENTS MRP0 sour_RO (Who said FISH & CHIPS?) AUTOMATIC SHIP AND FIX!
Corrupted Blocks on Standby Oracle Active Data Guard 12cR2. Is it the best option?29 12/2/2017
Corrupted Blocks on Standby: you got the point, right? Oracle Active Data Guard 12cR2. Is it the best option?30 12/2/2017
Oracle Active Data Guard 12cR2. Is it the best option?31 12/2/2017 Fast Incremental Backup On Standby (11g)
Block Change Tracking on Primary only Oracle Active Data Guard 12cR2. Is it the best option?32 12/2/2017 BCT Incremental Backup on Primary: FAST
Block Change Tracking on Primary only Oracle Active Data Guard 12cR2. Is it the best option?33 12/2/2017 BCT Incremental Backup on Primary: FAST Incremental Backup on Standby: SLOW
Block Change Tracking on Primary and Standby Oracle Active Data Guard 12cR2. Is it the best option?34 12/2/2017 BCT Incremental Backup on Primary: FAST Incremental Backup on Standby: FAST BCT
Oracle Active Data Guard 12cR2. Is it the best option?35 12/2/2017 Advanced topologies: Real-time Cascading Standby (12cR1)
Real-Time Cascading Standby Oracle Active Data Guard 12cR2. Is it the best option?36 12/2/2017 PRIMARY CASCADING CASCADED
Real-Time Cascading Standby Oracle Active Data Guard 12cR2. Is it the best option?37 12/2/2017 SYNC, FASTSYNC or ASYNC (LGWR) ASYNC (LGWR) <none> (ARCH) Cascade supported by the broker introduced in 12c
Real-Time Cascading Standby - «RedoRoutes» Oracle Active Data Guard 12cR2. Is it the best option?38 12/2/2017 PROD DR REP RedoRoutes=‘(LOCAL : DR)’ RedoRoutes=‘ (PROD : REP ASYNC) (REP : PROD ASYNC) (LOCAL : REP , PROD)’ RedoRoutes=‘(LOCAL:DR)’
Real-Time Cascade use case: again reader farms! Oracle Active Data Guard 12cR2. Is it the best option?39 12/2/2017 PRIMARY REP1 REP2 REP3 REP4 REP5 REP6 UPDATES READS
Real-Time Cascade use case: again reader farms! Oracle Active Data Guard 12cR2. Is it the best option?40 12/2/2017 PRIMARY REP1 REP2 REP3 REP4 REP5 REP6 SYNC UPDATES READS
Oracle Active Data Guard 12cR2. Is it the best option?41 12/2/2017 Advanced topologies: Far Sync Standby (12cR1)
High distances = High latencies Oracle Active Data Guard 12cR2. Is it the best option?42 12/2/2017 Too far to support SYNC redo-transport ASYNC ONLY!!
Without Active Data Guard Oracle Active Data Guard 12cR2. Is it the best option?43 12/2/2017 ASYNC REMOTE SYNC LOCAL
With Active Data Guard Oracle Active Data Guard 12cR2. Is it the best option?44 12/2/2017 FAR_SYNC Instance SYNC LOCAL ASYNC REMOTE
FAR_SYNC instance characteristics Oracle Active Data Guard 12cR2. Is it the best option?45 12/2/2017 Special controlfile – ALTER DATABASE CREATE FAR SYNC INSTANCE CONTROLFILE; NO datafiles and NO redo-apply Standby logs are written and archived The redo stream is redirected to the standby Can’t be opened or converted to standby or primary
Example: one FAR_SYNC for each location Oracle Active Data Guard 12cR2. Is it the best option?46 12/2/2017 SYNC LOCAL FS_PROD FS_DRPROD DR REP ASYNC REMOTE
Example: one FAR_SYNC for each location Oracle Active Data Guard 12cR2. Is it the best option?47 12/2/2017 SYNC LOCAL ASYNC REMOTE FS_PROD FS_DRPROD DR REP
Oracle Active Data Guard 12cR2. Is it the best option?48 12/2/2017 Advanced topologies: Enhanced Alternate Destinations (12cR2)
Enhanced RedoRoutes Oracle Active Data Guard 12cR2. Is it the best option?49 12/2/2017 PROD DR REP RedoRoutes=‘(LOCAL : DR)’ RedoRoutes=‘ (PROD : REP ASYNC) (REP : PROD ASYNC) (LOCAL : REP , PROD)’ RedoRoutes=‘(LOCAL:DR)’
Enhanced RedoRoutes Oracle Active Data Guard 12cR2. Is it the best option?50 12/2/2017 PROD DR REP RedoRoutes=‘(LOCAL : DR)’ RedoRoutes=‘ (PROD : REP ASYNC) (REP : PROD ASYNC) (LOCAL : REP , PROD)’ RedoRoutes=‘(LOCAL:DR)’ !
Enhanced RedoRoutes Oracle Active Data Guard 12cR2. Is it the best option?51 12/2/2017 PROD DR REP RedoRoutes=‘(LOCAL : (DR PRIORITY=1, REP PRIORITY=2))’ RedoRoutes=‘ (PROD : REP ASYNC) (REP : PROD ASYNC) (LOCAL : REP , PROD)’ RedoRoutes=‘(LOCAL:(DR PRIORITY=1, PROD PRIORITY=2))’
Enhanced RedoRoutes Oracle Active Data Guard 12cR2. Is it the best option?52 12/2/2017 PROD DR REP RedoRoutes=‘(LOCAL : (DR PRIORITY=1, REP PRIORITY=2))’ RedoRoutes=‘ (PROD : REP ASYNC) (REP : PROD ASYNC) (LOCAL : REP , PROD)’ RedoRoutes=‘(LOCAL:(DR PRIORITY=1, PROD PRIORITY=2))’
Oracle Active Data Guard 12cR2. Is it the best option?53 12/2/2017 Application Continuity (12cR1)
Application Continuity Oracle Active Data Guard 12cR2. Is it the best option? For temporary recoverable outages Transaction Guard – server side component – Records transaction state within database – Available with Oracle 12c Enterprise Edition. Oracle 12c JDBC Replay Driver – client side component – Replays the failed request. – In 12.1 only for JDBC thin client, in 12.2 also OCI and ODP.net. Requires RAC or RAC One Node or ADG (GG) option. 12/2/201754
Application Continuity Oracle Active Data Guard 12cR2. Is it the best option? Example AC/TG interaction with UCP 1 Check-out connection (Request begin) Associate LTXID Send LTXID to the driver 2 3 Work: INS/DEL/UPD/COM INS DEL UPD COM Replay Buffer 4 Communication Break 5 Recoverable Error SQL Exception 8 Check the last LTXID outcome 7 If safe, Replay 6 Request new connection 9 Check-in connection (Request end) UCP 12/2/201755 Runtime Re-ConnectReplay
Oracle Active Data Guard 12cR2. Is it the best option?56 12/2/2017 Transparent Application Continuity (18c)
TAC: Application Continuity at the server side Oracle Active Data Guard 12cR2. Is it the best option?57 12/2/2017
Oracle Active Data Guard 12cR2. Is it the best option?58 12/2/2017 (easier) Rolling Upgrades
Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?59 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS)
Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?60 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS) SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) DBMS_ROLLING. START_PLAN
Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?61 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS) SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) DBMS_ROLLING. START_PLAN SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) Manual upgrade
Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?62 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS) SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) DBMS_ROLLING. START_PLAN SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) Manual upgrade SALES_ZH (logical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) DBMS_ROLLING. SWITCHOVER
Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?63 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS) SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) DBMS_ROLLING. START_PLAN SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) Manual upgrade SALES_ZH (logical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) DBMS_ROLLING. SWITCHOVER SALES_ZH (logical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) Manual upgrade
Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?64 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS) SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) DBMS_ROLLING. START_PLAN SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) Manual upgrade SALES_ZH (logical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) DBMS_ROLLING. SWITCHOVER SALES_ZH (logical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) SALES_ZH (physical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) Manual upgrade DBMS_ROLLING. FINISH_PLAN
What if you have to do it manually? Oracle Active Data Guard 12cR2. Is it the best option?65 12/2/2017 https://docs.oracle.com/database/121/SBYDB/dbms_rolling_upgrades.htm#SBYDB5230 SQL> SELECT instid, target, phase, description FROM DBA_ROLLING_PLAN; INSTID TARGET PHASE DESCRIPTION ------ ------------ ------- ----------------------------------------------------- 1 seattle START Verify database is a primary 2 seattle START Verify MAXIMUM PROTECTION is disabled 3 boston START Verify database is a physical standby 4 boston START Verify physical standby is mounted ... 93 oakland SWITCH Stop media recovery 94 seattle SWITCH Synchronize plan with new primary 95 seattle FINISH Verify only a single instance is active 96 seattle FINISH Verify database is mounted ... 111 oakland FINISH Wait until upgrade redo has been fully recovered 112 seattle FINISH Drop guaranteed restore point DBMSRU_INITIAL 113 boston FINISH Drop guaranteed restore point DBMSRU_INITIAL 114 oakland FINISH Drop guaranteed restore point DBMSRU_INITIAL 115 atlanta FINISH Drop guaranteed restore point DBMSRU_INITIAL
Oracle Active Data Guard 12cR2. Is it the best option?66 12/2/2017 Global Data Services
Local Data Services (Active Data Guard, no Clustware) Oracle Active Data Guard 12cR2. Is it the best option?67 12/2/2017 PRIMARY STANDBY SERVICE_A_RO CREATE OR REPLACE TRIGGER service_a_ro after startup on database DECLARE role VARCHAR(30); BEGIN SELECT DATABASE_ROLE INTO role FROM V$DATABASE; IF role = 'PRIMARY' THEN DBMS_SERVICE.START_SERVICE(service_a'); ELSE DBMS_SERVICE.START_SERVICE(service_a_ro'); END IF; END; /DB_SITE1 DB_SITE2 SERVICE_A_RW
Local Data Services (MAA, Active Data Guard, etc.) Oracle Active Data Guard 12cR2. Is it the best option?68 12/2/2017 Create services for Primary role on ALL the databases Create services for Standby role on ALL the databases Define connection descriptors with static address list
Local Data Services: not for complex environments Oracle Active Data Guard 12cR2. Is it the best option?69 12/2/2017 PRIMARY STANDBY STANDBY STANDBY SYNC ASYNC ASYNC
Local Data Services: not for complex environments Oracle Active Data Guard 12cR2. Is it the best option?70 12/2/2017 PRIMARY STANDBY STANDBY STANDBY SYNC ASYNC ASYNC SWISS CLIENTS READ HERE GERMAN CLIENTS READ HERE
Local Data Services: not for complex environments Oracle Active Data Guard 12cR2. Is it the best option?71 12/2/2017 PRIMARY STANDBY STANDBY STANDBY SYNC ASYNC ASYNC IN CASE OF LAG BOTH READ HERE
Local Data Services: not for complex environments Oracle Active Data Guard 12cR2. Is it the best option?72 12/2/2017 PRIMARY STANDBY STANDBY STANDBY SYNC ASYNC ASYNC IN CASE OF PROBLEMS ALL READ FROM PRIMARY
Global Data Services – Big Picture Oracle Active Data Guard 12cR2. Is it the best option?73 12/2/2017 Global Service Manager 1 Global Service Manager 2 Global Service Manager 3 Global Service Manager 4 SALES SALESSALES SALES SALESSALES Golden Gate, Active Data Guard, Streams, […] GDS POOL: SALES (sales_rw, sales_ro, sales_rep, …) GDS CATALOG GDS CATALOG
Global Data Services – How it works? Oracle Active Data Guard 12cR2. Is it the best option?74 12/2/2017 SALES SALES SALESSALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 Request a connection for a global service to a GSM Service naming: <gs_name>.<gds_pool>.<gds_configuration> 1
Global Data Services – How it works? Oracle Active Data Guard 12cR2. Is it the best option?75 12/2/2017 SALES SALES SALESSALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 2 Request a connection for a global service to a GSM Service naming: <gs_name>.<gds_pool>.<gds_configuration> GSM returns the local listener address (SCAN is bypassed) 1 2
Global Data Services – How it works? Oracle Active Data Guard 12cR2. Is it the best option?76 12/2/2017 SALES SALES SALESSALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 2 3 Request a connection for a global service to a GSM Service naming: <gs_name>.<gds_pool>.<gds_configuration> GSM returns the local listener address (SCAN is bypassed) Connect to the Global Service active locally on the target 1 2 3
Global Database Services - Features Oracle Active Data Guard 12cR2. Is it the best option?77 12/2/2017 Global Data Services support – Local Service Attributes (TAF, rlbgoal, clbgoal, commit outcome…) – Preferred and available databases – Replication lag threshold (ADG only) – Region affinity
Global Connection Region Affinity - Anywhere Oracle Active Data Guard 12cR2. Is it the best option?78 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality ANYWHERE SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALES
Global Connection Region Affinity - Anywhere Oracle Active Data Guard 12cR2. Is it the best option?79 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality ANYWHERE SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 SALES SALES 1 REMOTE LOCAL
Global Connection Region Affinity – Local Only Oracle Active Data Guard 12cR2. Is it the best option?80 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALES
Global Connection Region Affinity – Local Only Oracle Active Data Guard 12cR2. Is it the best option?81 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 SALES SALES LOCAL
Global Connection Region Affinity – Local Only Oracle Active Data Guard 12cR2. Is it the best option?82 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 2 SALES SALES LOCAL CRASH
Global Connection Region Affinity – Local Only Oracle Active Data Guard 12cR2. Is it the best option?83 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 2 3 SALES SALES LOCAL CRASH TNS-12514
Global Connection Region Affinity – Region Failover Oracle Active Data Guard 12cR2. Is it the best option?84 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY –region_failover SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALESSALES SALES
Global Connection Region Affinity – Region Failover Oracle Active Data Guard 12cR2. Is it the best option?85 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY –region_failover SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALESSALES SALES 1 LOCAL
Global Connection Region Affinity – Region Failover Oracle Active Data Guard 12cR2. Is it the best option?86 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY –region_failover SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALESSALES SALES 1 2 LOCAL CRASH
Global Connection Region Affinity – Region Failover Oracle Active Data Guard 12cR2. Is it the best option?87 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY –region_failover SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALESSALES SALES 1 2 3 LOCAL CRASH REMOTE
Role-Based Global Services – Lag Tolerance Oracle Active Data Guard 12cR2. Is it the best option?88 12/2/2017 Role-based services are supported for pool databases in Data Guard Broker configuration GDSCTL> ADD SERVICE -gdspool <gds_pool> -service <service> [ -role PRIMARY | -role PHYSICAL_STANDBY -failover_primary –lag 20 DB1 DB2 PRIMARY DB3 1 STANDBY STANDBY
Role-Based Global Services – Lag Tolerance Oracle Active Data Guard 12cR2. Is it the best option?89 12/2/2017 Role-based services are supported for pool databases in Data Guard Broker configuration GDSCTL> ADD SERVICE -gdspool <gds_pool> -service <service> [ -role PRIMARY | -role PHYSICAL_STANDBY -failover_primary –lag 20 DB1 DB2 PRIMARY DB3 1 2 STANDBY STANDBY STANDBYPRIMARYSTANDBY
Role-Based Global Services – Lag Tolerance Oracle Active Data Guard 12cR2. Is it the best option?90 12/2/2017 Role-based services are supported for pool databases in Data Guard Broker configuration GDSCTL> ADD SERVICE -gdspool <gds_pool> -service <service> [ -role PRIMARY | -role PHYSICAL_STANDBY -failover_primary –lag 20 DB1 DB2 PRIMARY DB3 1 2 STANDBY STANDBY STANDBYPRIMARYSTANDBY 3 STANDBYPRIMARYSTANDBY LAG>20
Role-Based Global Services – Lag Tolerance Oracle Active Data Guard 12cR2. Is it the best option?91 12/2/2017 Role-based services are supported for pool databases in Data Guard Broker configuration GDSCTL> ADD SERVICE -gdspool <gds_pool> -service <service> [ -role PRIMARY | -role PHYSICAL_STANDBY -failover_primary –lag 20 DB1 DB2 PRIMARY DB3 1 2 STANDBY STANDBY STANDBYPRIMARYSTANDBY 3 4 STANDBY STANDBY PRIMARYSTANDBY LAG>20
Role-Based Global Services – Lag Tolerance Oracle Active Data Guard 12cR2. Is it the best option?92 12/2/2017 Role-based services are supported for pool databases in Data Guard Broker configuration GDSCTL> ADD SERVICE -gdspool <gds_pool> -service <service> [ -role PRIMARY | -role PHYSICAL_STANDBY -failover_primary –lag 20 DB1 DB2 PRIMARY DB3 1 2 STANDBY STANDBY STANDBYPRIMARYSTANDBY 3 4 STANDBY STANDBY PRIMARYSTANDBY LAG>20 PRIMARYSTANDBY STANDBY LAG<=20 5
Oracle Active Data Guard 12cR2. Is it the best option?93 12/2/2017 So?
Take aways Oracle Active Data Guard 12cR2. Is it the best option?94 12/2/2017 You pay for your standby: with Active Data Guard you can increase the ROI You use Active Data Guard for real-time query? There is more! One standby uses ADG, the others no? License just that server! If you have Golden Gate, you already have ADG. Use it!
12/2/2017 Oracle Active Data Guard 12cR2. Is it the best option?95 Technology on its own won't help you. You need to know how to use it properly.
Trivadis @ DOAG 2017 #opencompany Booth: 3rd Floor – next to the escalator We share our Know how! Just come across, Live-Presentations and documents archive T-Shirts, Contest and much more We look forward to your visit 12/2/2017 Oracle Active Data Guard 12cR2. Is it the best option?96

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Oracle Active Data Guard 12cR2. Is it the best option?

  • 1. Oracle Active Data Guard 12cR2 Is it the best option? Ludovico Caldara Oracle ACE Director Senior Consultant @ ludodba DOAG2017
  • 2. About Ludovico Caldara Oracle Active Data Guard 12cR2. Is it the best option?2 12/2/2017 ■ 18 Years DBA (Not Only Oracle) ▪ I do it everywhere (even Windows) ■ RAC ATTACK Ninja & co-writer ■ President, SOUG & ITOUG Board ■ OCP (11g, 12c, MySQL) & OCE ■ Italian living in Switzerland ■ http://www.ludovicocaldara.net ■ @ludodba ludodba ■ ludovicocaldara
  • 3. Our company. Oracle Active Data Guard 12cR2. Is it the best option?3 12/2/2017 Trivadis is a market leader in IT consulting, system integration, solution engineering and the provision of IT services focusing on and technologies in Switzerland, Germany, Austria and Denmark. We offer our services in the following strategic business fields: Trivadis Services takes over the interactive operation of your IT systems. O P E R A T I O N
  • 4. COPENHAGEN MUNICH LAUSANNE BERN ZURICH BRUGG GENEVA HAMBURG DÜSSELDORF FRANKFURT STUTTGART FREIBURG BASEL VIENNA With over 600 specialists and IT experts in your region. Oracle Active Data Guard 12cR2. Is it the best option?4 12/2/2017 14 Trivadis branches and more than 600 employees 200 Service Level Agreements Over 4,000 training participants Research and development budget: CHF 5.0 / EUR 4 million Financially self-supporting and sustainably profitable Experience from more than 1,900 projects per year at over 800 customers
  • 5. My experiences with German Oracle Active Data Guard 12cR2. Is it the best option?5 12/2/2017 Ich möchte ein Bier, bitte!
  • 6. My experiences with German Oracle Active Data Guard 12cR2. Is it the best option?6 12/2/2017 Es ist nicht ein Problem mit der Datenbank
  • 7. Duolingo level 3! Oracle Active Data Guard 12cR2. Is it the best option?7 12/2/2017
  • 8. Duolingo level 3! Oracle Active Data Guard 12cR2. Is it the best option?8 12/2/2017 Die Suppe ist schlect.
  • 9. Duolingo level 3! Oracle Active Data Guard 12cR2. Is it the best option?9 12/2/2017 Die Suppe ist schlect. Können Sie bitte aufhören, Rapport-Anfragen auf den Produktionsdatenbanken zu erstellen? Sie verlangsamen unser Geschäft.
  • 10. Oracle Active Data Guard 12cR2. Is it the best option?10 12/2/2017 Oracle Data Guard?
  • 11. Why is Oracle Data Guard still relevant? Oracle Active Data Guard 12cR2. Is it the best option?11 12/2/2017 The best high availability solution in the Oracle ecosystem – Synchronous (or not) – One-to-one copy (or one-to-many) – No single points of failure – Failover is (almost) transparent to the applications (if well configured) Rock solid! Included in Oracle Database Enterprise Edition
  • 12. Oracle Active Data Guard 12cR2. Is it the best option?12 12/2/2017 Active Data Guard?
  • 13. Agenda… or which features I will try to cover Oracle Active Data Guard 12cR2. Is it the best option?13 12/2/2017 Real-time Query Automatic Block Repair Fast Incremental Backup on Standby Advanced topologies (Real-time Cascading Standby, Far Sync Standby, Alternate destinations) Application Continuity Rolling Upgrades Global Data Services Subset Standby Multiple Instance Redo Apply
  • 14. Agenda… or which features I will try to cover Oracle Active Data Guard 12cR2. Is it the best option?14 12/2/2017 Real-time Query Automatic Block Repair Fast Incremental Backup on Standby Advanced topologies (Real-time Cascading Standby, Far Sync Standby, Alternate destinations) Application Continuity Rolling Upgrades Global Data Services Subset Standby Multiple Instance Redo Apply We are talking about extra-cost features!
  • 15. Oracle Active Data Guard 12cR2. Is it the best option?15 12/2/2017 Real-time Query (11g)
  • 16. Without Real-Time Query Oracle Active Data Guard 12cR2. Is it the best option?16 12/2/2017 sour_ludo sour_vico sour_RW CLIENTS MRP0
  • 17. With Real-Time Query Oracle Active Data Guard 12cR2. Is it the best option?17 12/2/2017 sour_ludo sour_vico sour_RW CLIENTS MRP0 sour_RO UPDATES READS SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL; SQL> ALTER DATABASE OPEN; SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT;
  • 18. Real-Time Query use case: reader farms Oracle Active Data Guard 12cR2. Is it the best option?18 12/2/2017 PRIMARY REP1 REP2 REP3 REP4 REP5 REP6 UPDATES READS
  • 19. Real-Time Query: Support for GTTs Oracle Active Data Guard 12cR2. Is it the best option?19 12/2/2017 UNDO TBS TEMP TBS TEMP_UNDO_ENABLED = TRUE GLOBAL TEMPORARY TABLE DATA TBS SYSTEM TBS DATA & UNDONew in 12c
  • 20. Real-Time Query: Support for sequences Oracle Active Data Guard 12cR2. Is it the best option?20 12/2/2017 ASKS FOR A SET OF USABLE SEQUENCES PRIMARY STANDBYNew in 12c It works only if CACHE and NOORDER are set It does not work on cascade standbys
  • 21. Take Away Oracle Active Data Guard 12cR2. Is it the best option?21 12/2/2017 You already pay Enterprise Licenses for the Primary and the Stanby 8CPUs8CPUs APP Writes Non Off-loadable Reads Off-loadable (non-critical) Reads 380K$
  • 22. Take Away Oracle Active Data Guard 12cR2. Is it the best option?22 12/2/2017 You already pay Enterprise Licenses for the Primary and the Stanby 8CPUs8CPUs APP Writes Non Off-loadable Reads Off-loadable (non-critical) Reads 4CPUs4CPUs 380K$ 236K$
  • 23. Take Away Oracle Active Data Guard 12cR2. Is it the best option?23 12/2/2017 You already pay Enterprise Licenses for the Primary and the Stanby 8CPUs8CPUs APP Writes Non Off-loadable Reads Off-loadable (non-critical) Reads 4CPUs4CPUs 4CPUs4CPUs 4CPUs 380K$ 354K$ 236K$
  • 24. Take Away Oracle Active Data Guard 12cR2. Is it the best option?24 12/2/2017
  • 25. Oracle Active Data Guard 12cR2. Is it the best option?25 12/2/2017 Automatic Block Repair
  • 26. Corrupted Blocks on Primary Oracle Active Data Guard 12cR2. Is it the best option?26 12/2/2017 sour_ludo sour_vico sour_RW CLIENTS MRP0 sour_RO CORRUPT BLOCK!
  • 27. Corrupted Blocks on Primary Oracle Active Data Guard 12cR2. Is it the best option?27 12/2/2017 sour_ludo sour_vico sour_RW CLIENTS MRP0 sour_RO AUTOMATICALLY FIND THE GOOD COPY
  • 28. Corrupted Blocks on Primary Oracle Active Data Guard 12cR2. Is it the best option?28 12/2/2017 sour_ludo sour_vico sour_RW CLIENTS MRP0 sour_RO (Who said FISH & CHIPS?) AUTOMATIC SHIP AND FIX!
  • 29. Corrupted Blocks on Standby Oracle Active Data Guard 12cR2. Is it the best option?29 12/2/2017
  • 30. Corrupted Blocks on Standby: you got the point, right? Oracle Active Data Guard 12cR2. Is it the best option?30 12/2/2017
  • 31. Oracle Active Data Guard 12cR2. Is it the best option?31 12/2/2017 Fast Incremental Backup On Standby (11g)
  • 32. Block Change Tracking on Primary only Oracle Active Data Guard 12cR2. Is it the best option?32 12/2/2017 BCT Incremental Backup on Primary: FAST
  • 33. Block Change Tracking on Primary only Oracle Active Data Guard 12cR2. Is it the best option?33 12/2/2017 BCT Incremental Backup on Primary: FAST Incremental Backup on Standby: SLOW
  • 34. Block Change Tracking on Primary and Standby Oracle Active Data Guard 12cR2. Is it the best option?34 12/2/2017 BCT Incremental Backup on Primary: FAST Incremental Backup on Standby: FAST BCT
  • 35. Oracle Active Data Guard 12cR2. Is it the best option?35 12/2/2017 Advanced topologies: Real-time Cascading Standby (12cR1)
  • 36. Real-Time Cascading Standby Oracle Active Data Guard 12cR2. Is it the best option?36 12/2/2017 PRIMARY CASCADING CASCADED
  • 37. Real-Time Cascading Standby Oracle Active Data Guard 12cR2. Is it the best option?37 12/2/2017 SYNC, FASTSYNC or ASYNC (LGWR) ASYNC (LGWR) <none> (ARCH) Cascade supported by the broker introduced in 12c
  • 38. Real-Time Cascading Standby - «RedoRoutes» Oracle Active Data Guard 12cR2. Is it the best option?38 12/2/2017 PROD DR REP RedoRoutes=‘(LOCAL : DR)’ RedoRoutes=‘ (PROD : REP ASYNC) (REP : PROD ASYNC) (LOCAL : REP , PROD)’ RedoRoutes=‘(LOCAL:DR)’
  • 39. Real-Time Cascade use case: again reader farms! Oracle Active Data Guard 12cR2. Is it the best option?39 12/2/2017 PRIMARY REP1 REP2 REP3 REP4 REP5 REP6 UPDATES READS
  • 40. Real-Time Cascade use case: again reader farms! Oracle Active Data Guard 12cR2. Is it the best option?40 12/2/2017 PRIMARY REP1 REP2 REP3 REP4 REP5 REP6 SYNC UPDATES READS
  • 41. Oracle Active Data Guard 12cR2. Is it the best option?41 12/2/2017 Advanced topologies: Far Sync Standby (12cR1)
  • 42. High distances = High latencies Oracle Active Data Guard 12cR2. Is it the best option?42 12/2/2017 Too far to support SYNC redo-transport ASYNC ONLY!!
  • 43. Without Active Data Guard Oracle Active Data Guard 12cR2. Is it the best option?43 12/2/2017 ASYNC REMOTE SYNC LOCAL
  • 44. With Active Data Guard Oracle Active Data Guard 12cR2. Is it the best option?44 12/2/2017 FAR_SYNC Instance SYNC LOCAL ASYNC REMOTE
  • 45. FAR_SYNC instance characteristics Oracle Active Data Guard 12cR2. Is it the best option?45 12/2/2017 Special controlfile – ALTER DATABASE CREATE FAR SYNC INSTANCE CONTROLFILE; NO datafiles and NO redo-apply Standby logs are written and archived The redo stream is redirected to the standby Can’t be opened or converted to standby or primary
  • 46. Example: one FAR_SYNC for each location Oracle Active Data Guard 12cR2. Is it the best option?46 12/2/2017 SYNC LOCAL FS_PROD FS_DRPROD DR REP ASYNC REMOTE
  • 47. Example: one FAR_SYNC for each location Oracle Active Data Guard 12cR2. Is it the best option?47 12/2/2017 SYNC LOCAL ASYNC REMOTE FS_PROD FS_DRPROD DR REP
  • 48. Oracle Active Data Guard 12cR2. Is it the best option?48 12/2/2017 Advanced topologies: Enhanced Alternate Destinations (12cR2)
  • 49. Enhanced RedoRoutes Oracle Active Data Guard 12cR2. Is it the best option?49 12/2/2017 PROD DR REP RedoRoutes=‘(LOCAL : DR)’ RedoRoutes=‘ (PROD : REP ASYNC) (REP : PROD ASYNC) (LOCAL : REP , PROD)’ RedoRoutes=‘(LOCAL:DR)’
  • 50. Enhanced RedoRoutes Oracle Active Data Guard 12cR2. Is it the best option?50 12/2/2017 PROD DR REP RedoRoutes=‘(LOCAL : DR)’ RedoRoutes=‘ (PROD : REP ASYNC) (REP : PROD ASYNC) (LOCAL : REP , PROD)’ RedoRoutes=‘(LOCAL:DR)’ !
  • 51. Enhanced RedoRoutes Oracle Active Data Guard 12cR2. Is it the best option?51 12/2/2017 PROD DR REP RedoRoutes=‘(LOCAL : (DR PRIORITY=1, REP PRIORITY=2))’ RedoRoutes=‘ (PROD : REP ASYNC) (REP : PROD ASYNC) (LOCAL : REP , PROD)’ RedoRoutes=‘(LOCAL:(DR PRIORITY=1, PROD PRIORITY=2))’
  • 52. Enhanced RedoRoutes Oracle Active Data Guard 12cR2. Is it the best option?52 12/2/2017 PROD DR REP RedoRoutes=‘(LOCAL : (DR PRIORITY=1, REP PRIORITY=2))’ RedoRoutes=‘ (PROD : REP ASYNC) (REP : PROD ASYNC) (LOCAL : REP , PROD)’ RedoRoutes=‘(LOCAL:(DR PRIORITY=1, PROD PRIORITY=2))’
  • 53. Oracle Active Data Guard 12cR2. Is it the best option?53 12/2/2017 Application Continuity (12cR1)
  • 54. Application Continuity Oracle Active Data Guard 12cR2. Is it the best option? For temporary recoverable outages Transaction Guard – server side component – Records transaction state within database – Available with Oracle 12c Enterprise Edition. Oracle 12c JDBC Replay Driver – client side component – Replays the failed request. – In 12.1 only for JDBC thin client, in 12.2 also OCI and ODP.net. Requires RAC or RAC One Node or ADG (GG) option. 12/2/201754
  • 55. Application Continuity Oracle Active Data Guard 12cR2. Is it the best option? Example AC/TG interaction with UCP 1 Check-out connection (Request begin) Associate LTXID Send LTXID to the driver 2 3 Work: INS/DEL/UPD/COM INS DEL UPD COM Replay Buffer 4 Communication Break 5 Recoverable Error SQL Exception 8 Check the last LTXID outcome 7 If safe, Replay 6 Request new connection 9 Check-in connection (Request end) UCP 12/2/201755 Runtime Re-ConnectReplay
  • 56. Oracle Active Data Guard 12cR2. Is it the best option?56 12/2/2017 Transparent Application Continuity (18c)
  • 57. TAC: Application Continuity at the server side Oracle Active Data Guard 12cR2. Is it the best option?57 12/2/2017
  • 58. Oracle Active Data Guard 12cR2. Is it the best option?58 12/2/2017 (easier) Rolling Upgrades
  • 59. Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?59 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS)
  • 60. Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?60 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS) SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) DBMS_ROLLING. START_PLAN
  • 61. Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?61 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS) SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) DBMS_ROLLING. START_PLAN SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) Manual upgrade
  • 62. Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?62 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS) SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) DBMS_ROLLING. START_PLAN SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) Manual upgrade SALES_ZH (logical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) DBMS_ROLLING. SWITCHOVER
  • 63. Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?63 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS) SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) DBMS_ROLLING. START_PLAN SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) Manual upgrade SALES_ZH (logical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) DBMS_ROLLING. SWITCHOVER SALES_ZH (logical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) Manual upgrade
  • 64. Automatic steps with DBMS_ROLLING! Oracle Active Data Guard 12cR2. Is it the best option?64 12/2/2017 SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (physical SB) T R A I L I N G L E A D I I N G DBMS_ROLLING. INIT_PLAN(SALES_LS) SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) DBMS_ROLLING. START_PLAN SALES_ZH (primary) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (logical SB) Manual upgrade SALES_ZH (logical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) DBMS_ROLLING. SWITCHOVER SALES_ZH (logical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) SALES_ZH (physical SB) SALES_BS (physical SB) SALES_BE (physical SB) SALES_LS (primary) Manual upgrade DBMS_ROLLING. FINISH_PLAN
  • 65. What if you have to do it manually? Oracle Active Data Guard 12cR2. Is it the best option?65 12/2/2017 https://docs.oracle.com/database/121/SBYDB/dbms_rolling_upgrades.htm#SBYDB5230 SQL> SELECT instid, target, phase, description FROM DBA_ROLLING_PLAN; INSTID TARGET PHASE DESCRIPTION ------ ------------ ------- ----------------------------------------------------- 1 seattle START Verify database is a primary 2 seattle START Verify MAXIMUM PROTECTION is disabled 3 boston START Verify database is a physical standby 4 boston START Verify physical standby is mounted ... 93 oakland SWITCH Stop media recovery 94 seattle SWITCH Synchronize plan with new primary 95 seattle FINISH Verify only a single instance is active 96 seattle FINISH Verify database is mounted ... 111 oakland FINISH Wait until upgrade redo has been fully recovered 112 seattle FINISH Drop guaranteed restore point DBMSRU_INITIAL 113 boston FINISH Drop guaranteed restore point DBMSRU_INITIAL 114 oakland FINISH Drop guaranteed restore point DBMSRU_INITIAL 115 atlanta FINISH Drop guaranteed restore point DBMSRU_INITIAL
  • 66. Oracle Active Data Guard 12cR2. Is it the best option?66 12/2/2017 Global Data Services
  • 67. Local Data Services (Active Data Guard, no Clustware) Oracle Active Data Guard 12cR2. Is it the best option?67 12/2/2017 PRIMARY STANDBY SERVICE_A_RO CREATE OR REPLACE TRIGGER service_a_ro after startup on database DECLARE role VARCHAR(30); BEGIN SELECT DATABASE_ROLE INTO role FROM V$DATABASE; IF role = 'PRIMARY' THEN DBMS_SERVICE.START_SERVICE(service_a'); ELSE DBMS_SERVICE.START_SERVICE(service_a_ro'); END IF; END; /DB_SITE1 DB_SITE2 SERVICE_A_RW
  • 68. Local Data Services (MAA, Active Data Guard, etc.) Oracle Active Data Guard 12cR2. Is it the best option?68 12/2/2017 Create services for Primary role on ALL the databases Create services for Standby role on ALL the databases Define connection descriptors with static address list
  • 69. Local Data Services: not for complex environments Oracle Active Data Guard 12cR2. Is it the best option?69 12/2/2017 PRIMARY STANDBY STANDBY STANDBY SYNC ASYNC ASYNC
  • 70. Local Data Services: not for complex environments Oracle Active Data Guard 12cR2. Is it the best option?70 12/2/2017 PRIMARY STANDBY STANDBY STANDBY SYNC ASYNC ASYNC SWISS CLIENTS READ HERE GERMAN CLIENTS READ HERE
  • 71. Local Data Services: not for complex environments Oracle Active Data Guard 12cR2. Is it the best option?71 12/2/2017 PRIMARY STANDBY STANDBY STANDBY SYNC ASYNC ASYNC IN CASE OF LAG BOTH READ HERE
  • 72. Local Data Services: not for complex environments Oracle Active Data Guard 12cR2. Is it the best option?72 12/2/2017 PRIMARY STANDBY STANDBY STANDBY SYNC ASYNC ASYNC IN CASE OF PROBLEMS ALL READ FROM PRIMARY
  • 73. Global Data Services – Big Picture Oracle Active Data Guard 12cR2. Is it the best option?73 12/2/2017 Global Service Manager 1 Global Service Manager 2 Global Service Manager 3 Global Service Manager 4 SALES SALESSALES SALES SALESSALES Golden Gate, Active Data Guard, Streams, […] GDS POOL: SALES (sales_rw, sales_ro, sales_rep, …) GDS CATALOG GDS CATALOG
  • 74. Global Data Services – How it works? Oracle Active Data Guard 12cR2. Is it the best option?74 12/2/2017 SALES SALES SALESSALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 Request a connection for a global service to a GSM Service naming: <gs_name>.<gds_pool>.<gds_configuration> 1
  • 75. Global Data Services – How it works? Oracle Active Data Guard 12cR2. Is it the best option?75 12/2/2017 SALES SALES SALESSALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 2 Request a connection for a global service to a GSM Service naming: <gs_name>.<gds_pool>.<gds_configuration> GSM returns the local listener address (SCAN is bypassed) 1 2
  • 76. Global Data Services – How it works? Oracle Active Data Guard 12cR2. Is it the best option?76 12/2/2017 SALES SALES SALESSALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 2 3 Request a connection for a global service to a GSM Service naming: <gs_name>.<gds_pool>.<gds_configuration> GSM returns the local listener address (SCAN is bypassed) Connect to the Global Service active locally on the target 1 2 3
  • 77. Global Database Services - Features Oracle Active Data Guard 12cR2. Is it the best option?77 12/2/2017 Global Data Services support – Local Service Attributes (TAF, rlbgoal, clbgoal, commit outcome…) – Preferred and available databases – Replication lag threshold (ADG only) – Region affinity
  • 78. Global Connection Region Affinity - Anywhere Oracle Active Data Guard 12cR2. Is it the best option?78 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality ANYWHERE SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALES
  • 79. Global Connection Region Affinity - Anywhere Oracle Active Data Guard 12cR2. Is it the best option?79 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality ANYWHERE SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 SALES SALES 1 REMOTE LOCAL
  • 80. Global Connection Region Affinity – Local Only Oracle Active Data Guard 12cR2. Is it the best option?80 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALES
  • 81. Global Connection Region Affinity – Local Only Oracle Active Data Guard 12cR2. Is it the best option?81 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 SALES SALES LOCAL
  • 82. Global Connection Region Affinity – Local Only Oracle Active Data Guard 12cR2. Is it the best option?82 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 2 SALES SALES LOCAL CRASH
  • 83. Global Connection Region Affinity – Local Only Oracle Active Data Guard 12cR2. Is it the best option?83 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS 1 2 3 SALES SALES LOCAL CRASH TNS-12514
  • 84. Global Connection Region Affinity – Region Failover Oracle Active Data Guard 12cR2. Is it the best option?84 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY –region_failover SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALESSALES SALES
  • 85. Global Connection Region Affinity – Region Failover Oracle Active Data Guard 12cR2. Is it the best option?85 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY –region_failover SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALESSALES SALES 1 LOCAL
  • 86. Global Connection Region Affinity – Region Failover Oracle Active Data Guard 12cR2. Is it the best option?86 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY –region_failover SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALESSALES SALES 1 2 LOCAL CRASH
  • 87. Global Connection Region Affinity – Region Failover Oracle Active Data Guard 12cR2. Is it the best option?87 12/2/2017 GDSCTL> ADD SERVICE -gdspool sales -service sales_rpt -locality LOCAL_ONLY –region_failover SALES SALES Golden Gate, Active Data Guard, Streams, […] GSM03 GSM04 GDS Region: SWITZERLAND GSM01 GSM02 GDS Region: GERMANY DATABASE CLIENTS SALES SALESSALES SALES 1 2 3 LOCAL CRASH REMOTE
  • 88. Role-Based Global Services – Lag Tolerance Oracle Active Data Guard 12cR2. Is it the best option?88 12/2/2017 Role-based services are supported for pool databases in Data Guard Broker configuration GDSCTL> ADD SERVICE -gdspool <gds_pool> -service <service> [ -role PRIMARY | -role PHYSICAL_STANDBY -failover_primary –lag 20 DB1 DB2 PRIMARY DB3 1 STANDBY STANDBY
  • 89. Role-Based Global Services – Lag Tolerance Oracle Active Data Guard 12cR2. Is it the best option?89 12/2/2017 Role-based services are supported for pool databases in Data Guard Broker configuration GDSCTL> ADD SERVICE -gdspool <gds_pool> -service <service> [ -role PRIMARY | -role PHYSICAL_STANDBY -failover_primary –lag 20 DB1 DB2 PRIMARY DB3 1 2 STANDBY STANDBY STANDBYPRIMARYSTANDBY
  • 90. Role-Based Global Services – Lag Tolerance Oracle Active Data Guard 12cR2. Is it the best option?90 12/2/2017 Role-based services are supported for pool databases in Data Guard Broker configuration GDSCTL> ADD SERVICE -gdspool <gds_pool> -service <service> [ -role PRIMARY | -role PHYSICAL_STANDBY -failover_primary –lag 20 DB1 DB2 PRIMARY DB3 1 2 STANDBY STANDBY STANDBYPRIMARYSTANDBY 3 STANDBYPRIMARYSTANDBY LAG>20
  • 91. Role-Based Global Services – Lag Tolerance Oracle Active Data Guard 12cR2. Is it the best option?91 12/2/2017 Role-based services are supported for pool databases in Data Guard Broker configuration GDSCTL> ADD SERVICE -gdspool <gds_pool> -service <service> [ -role PRIMARY | -role PHYSICAL_STANDBY -failover_primary –lag 20 DB1 DB2 PRIMARY DB3 1 2 STANDBY STANDBY STANDBYPRIMARYSTANDBY 3 4 STANDBY STANDBY PRIMARYSTANDBY LAG>20
  • 92. Role-Based Global Services – Lag Tolerance Oracle Active Data Guard 12cR2. Is it the best option?92 12/2/2017 Role-based services are supported for pool databases in Data Guard Broker configuration GDSCTL> ADD SERVICE -gdspool <gds_pool> -service <service> [ -role PRIMARY | -role PHYSICAL_STANDBY -failover_primary –lag 20 DB1 DB2 PRIMARY DB3 1 2 STANDBY STANDBY STANDBYPRIMARYSTANDBY 3 4 STANDBY STANDBY PRIMARYSTANDBY LAG>20 PRIMARYSTANDBY STANDBY LAG<=20 5
  • 93. Oracle Active Data Guard 12cR2. Is it the best option?93 12/2/2017 So?
  • 94. Take aways Oracle Active Data Guard 12cR2. Is it the best option?94 12/2/2017 You pay for your standby: with Active Data Guard you can increase the ROI You use Active Data Guard for real-time query? There is more! One standby uses ADG, the others no? License just that server! If you have Golden Gate, you already have ADG. Use it!
  • 95. 12/2/2017 Oracle Active Data Guard 12cR2. Is it the best option?95 Technology on its own won't help you. You need to know how to use it properly.
  • 96. Trivadis @ DOAG 2017 #opencompany Booth: 3rd Floor – next to the escalator We share our Know how! Just come across, Live-Presentations and documents archive T-Shirts, Contest and much more We look forward to your visit 12/2/2017 Oracle Active Data Guard 12cR2. Is it the best option?96