![주요 Parameter (httpd.conf)
ServerType standalone | inetd
StartServers 5
TimeOut 300
MaxRequestsPerChild 0
Port port
Listen [IP-address:]port
BindAddress *
ServerName fully-qualified-domain-name](https://image.slidesharecdn.com/apache-220720191432-2e827cf6/85/Apache-ppt-8-320.jpg)
![JServ : Load Balancing
mod_Jserv
– Weighted Random Routing (Round-Robin 방식)
[ Apach JServ Configuration File ]
ApJServManual on
ApJServMount /servlet balance://set1/zone1
ApJServBalance set1 jserv1
ApJServBalance set1 jserv2 4
ApJServHost jserv1 ajpv12://localhost:9011
ApJServHost jserv2 ajpv12://localhost:9012
ApJServRoute JS1 jserv1
ApJServRoute JS2 jserv2
ApJServShmFile /home3/9ias/kp/logs/mod_jserv.shm
Weight 4
Routing Parameter (Session 처리용)](https://image.slidesharecdn.com/apache-220720191432-2e827cf6/85/Apache-ppt-18-320.jpg)
![Configuring OracleJSP on iAS
Libraries
– ojsp.jar
– ojsputil.jar
These libraries must be in classpath
– wrapper.classpath=…/ojsp/lib/ojsp.jar
For Jserv/iAS, OracleJSP needs both servlet 2.0
and 2.1[2] libraries in classpath:
– wrapper.classpath=…/jsdk2.0/lib/jsdk.jar
– wrapper.classpath=…/ojsp/lib/servlet.jar
Works with JDK 1.1 and 1.2](https://image.slidesharecdn.com/apache-220720191432-2e827cf6/85/Apache-ppt-28-320.jpg)
Apache.ppt
- 2. High Performance Java Application - Apache, Jserv, Oracle JSP
- 4. Contents Apache JServ Oracle JServ Extension Oracle JSP
- 5. Apache
- 6. Parent Process Child Process mod_xx Child Process Child Process mod_xx HTTP JServ Process JServ Process JServ Process JSP mod_xx mod_xx httpd Process Max Children – MaxClients : Default 150, Maximum 1024 Threads on NT
- 7. Apache 실행 방법 & 환경 File 실행방법 – <9IAS_HOME>/Apache/Apache/bin/apachectl 이용 – apachectl 이용법 start | stop | restart | fullstatus | status | graceful | configtest | help | -f <config file> 예) 시작 : apachectl start 환경 File – <9IAS_HOME>/Apache/Apache/conf/httpd.conf – <9IAS_HOME>/Apache/Apache/conf/oracle_apache.conf – <9IAS_HOME>/Apache/Jserv/etc/jserv.conf – jserv.properties – zone.properties
- 8. 주요 Parameter (httpd.conf) ServerType standalone | inetd StartServers 5 TimeOut 300 MaxRequestsPerChild 0 Port port Listen [IP-address:]port BindAddress * ServerName fully-qualified-domain-name
- 9. JServ
- 10. Oracle HTTP Server (Apache) mod_jserv JServ 소개 100% Java Servlet Engine – Java Servlet APIs 2.0 specification 지원 Load Balancing 지원 HTTPS mod_perl mod_plsql mod_ssl HTTP JDK JVM AJP Apache JServ
- 11. JServ Glossary Servlet Zone – Partitioning mechanism ex. beta & production, long-running vs quick – the sandbox where servlets live during their life cycle – A zone defines the security environment where the executing servlet is restricted and allows context separation between different logical groups of servlets. Servlet Repository – a collection of servlets and may either be a directory or an archive, such as zip or jar file
- 12. JServ 내부 구조 JServConnection JServConnection JServConnection 무한 Loop JServConnection jservconnection = new JServConnection(); Thread thread = new Thread(jservconnection); thread.setDaemon(true); Socket socket = listenSocket.accept(); jservconnection.init(socket, semaphore); JServ ServerManagerTable Zone1 ServletManager1 Zone2 ServletManager2 Zone3 ServletManager3 Servlet1 ServletContext1 Servlet2 ServletContext2 Servlet3 ServletContext3 JServConnection • Servlet Reload Check • Servlet Load • Servlet 실행 ServletContext javax.servlet.Servlet servlet java.util.Properties initargs java.lang.String aliasName AJP Message
- 13. JServ 주요 Parameter (jserv.properties) Classpath 지정 – wrapper.classpath=/aa/lib/bb.jar – wrapper.classpath=/aa/lib/cc.jar JServ Communication 환경 설정 – wrapper.protocol=ajpv12 – port=8007 Servlet Zone 설정 – zone=zone1, zone2 – zone1.properties=/aa/zone1.properties – zone2.properties=/aa/zone2.properties Thread 수 – security.maxConnections=50
- 14. JServ 주요 Parameter (zone.properties) (1) Classloader 환경 설정 – autoreload.classes=true – autoreload.file=true – init.timeout=10000 – destroy.timeout=10000 Session 환경 지정 – session.useCookies=true – session.timeout=1800000 – session.checkFrequency=30000
- 15. JServ 주요 Parameter (zone.properties) (2) Repository 설정 – repository=/aa/servlets – repository=/aa/servlets/Parallel.jar OJSP 환경 설정 – servlet.ojsp.code=oracle.jsp.JspServlet – servlet.ojsp.initArgs=alias_translation=false Auto Startup, Init Parameter 지정 – servlet.startup=hellp,snoop,org.fool.Dummy – servlet.hello.code=org.fool.Dummy – servlet.default.initArgs=common.to.everybody=Hi ! – Servlet.org.fool.Dummy.initArgs=message=dummy
- 16. JServ Memory 환경 설정 ApJServManual Parameter Setting – default : off Automatic JServ Startup Mode (ApjServManual off) – wrapper.bin.parameters=-ms30M – wrapper.bin.parameters=-mx200M User Startup Mode (ApjServManual on) – java -ms30M -mx200M org.apache.jserv.JServ ...
- 17. JServ : Scalability 여러 개의 JServ Instances – Single Instance에 비해 좋은 이유 하나의 JVM에서 몇 천 개의 Threads 실행 문제 해결 중복을 통한 시스템의 안정성 증가 보안 향상 - 서로 다른 Servlet Zone으로 – AJP Protocol의 사용 Socket 기반 Protocol 다양한 구성 가능 - 여러 대의 Machine에 JServ 위치 가능
- 18. JServ : Load Balancing mod_Jserv – Weighted Random Routing (Round-Robin 방식) [ Apach JServ Configuration File ] ApJServManual on ApJServMount /servlet balance://set1/zone1 ApJServBalance set1 jserv1 ApJServBalance set1 jserv2 4 ApJServHost jserv1 ajpv12://localhost:9011 ApJServHost jserv2 ajpv12://localhost:9012 ApJServRoute JS1 jserv1 ApJServRoute JS2 jserv2 ApJServShmFile /home3/9ias/kp/logs/mod_jserv.shm Weight 4 Routing Parameter (Session 처리용)
- 19. JServ : Session 관리 & Fault Tolerance httpd httpd httpd JServ1 localhost:9011 JServ2 localhost:9012 1. 첫 번째 Request (Session 이용) : 임의의 JServ 선택 (JServ1) Shared Memory 2. 두 번째 Request (Session 이용) : JServ1 선택 1.에서 얻은 Routing 정보 이용 3. 세 번째 Request (Session 이용) : JServ1에 연결할 수 없는 경우 JServ1의 내부 상태를 Shared File에 기록 JServ2 선택 : 새로운 Session Object 생성 Watchdog Process 10초마다 한번씩 일어나 Shared Memory를 이용해서 Dead JServ Process 연결 시도 SessionID = xxx-JS1 SessionID = xxx-JS2
- 20. Multiple JServ 실행 환경 Apache 환경 – Apache JServ Configuration File 작성 실행 Script – nohup $JAVA -Dport=9011 $JAVA_ENV -classpath $CLASSES org.apache.jserv.JServ $JSERV_CONF/jserv9011.properties >> $JSERV_LOG/jserv9011.runtime 2>&1 & Shutdown – -s option 추가
- 22. Apache Parent Process Watchdog Process Memory Map File Apache Child Process Http requests AJPV12 mod_jserv Watch dog periodically pings “dead” JServ processes and if one is successfully pinged, it’s status is changed to “alive” Marks a JServ process as “dead” if it fails to send a request to that JServ process JServ Process The old Apache infrastructure (with JServ)
- 23. Issues with the Old Apache-JServ 오직 하나의 JServ Process만이 Automatic Mode로 시작, 재시작, 종료가 가능. 여러 개의 JServ의 시작, 재시작, 종료를 위해서는 Manual Mode이어야 함. Hi-Availability의 제한적 지원 – Death Detection이 가능하지만 자동적인 재시작은 지원하지 않음 Platform Constraints – Unix에서만 Watchdog 제공
- 24. During startup, registers process info to mod_oprocmgr via HTTP Http requests AJP12 Watchdog pings “dead” JServ processes, starting up replacement processes if necessary JServ Process JServ Wrapper Current state (alive/dead), port-number and other info for each server process Handles topology maintenance messages Apache Parent Process Apache Child Process mod_jserv mod_oprocmgr Memory Map File Process Table Enhanced Watchdog process Enhanced Apache Infrastructure
- 25. Enhanced Apache Infrastructure mod_oprocmgr – handles topology management (admin) http requests Server 등록 – Jserv는 HTTP 메시지를 Apache에게 보냄 – 이 메시지는 mod_oprocmgr이 관리 향상된 Watchdog Process 간단해진 구성 모든 JServ Process들이 Automatic Mode로 시작, 종료 가능 자동화된 Death Detection 및 재시작
- 26. Oracle JSP
- 27. Apache에서의 Oracle JSP 소개 Oracle JSP는 Servlet으로 구현되어 있음 – ApJServAction .jsp /servlets/oracle.jsp.JspServlet Oracle Jdeveloper에 통합되어 있음 – Source-level debugging on local servlet runner Runs on any standard servlet engine – Apache (iAS), JSWDK, Tomcat – All Oracle servlet engines Implements useful extensions – SQLJ in scriptlets, command-line translator ojspc, custom tag library and data access beans
- 28. Configuring OracleJSP on iAS Libraries – ojsp.jar – ojsputil.jar These libraries must be in classpath – wrapper.classpath=…/ojsp/lib/ojsp.jar For Jserv/iAS, OracleJSP needs both servlet 2.0 and 2.1[2] libraries in classpath: – wrapper.classpath=…/jsdk2.0/lib/jsdk.jar – wrapper.classpath=…/ojsp/lib/servlet.jar Works with JDK 1.1 and 1.2