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Introduction to MongoDB and Ruby

MongoDB
MongoDB

This document introduces MongoDB and Ruby by providing examples of how to: 1) Connect to MongoDB from Ruby and load user data from Twitter's API into a MongoDB collection. 2) Perform a simple query on the collection to find the top 10 users by follower count. 3) Outline how additional tweets could be loaded for those users (simplified for brevity). The examples demonstrate how Ruby code interacts with MongoDB through drivers to load, query and retrieve JSON data in a few lines of code.

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10/19/12 Introduction to MongoDB and Ruby INTRODUCTION TO MONGODB AND RUBY Gary J. Murakami, Ph.D. Lead Engineer & Ruby Evangelist 10gen (the MongoDB company) gary.murakami@10gen.com Tuesday, September 25, 2012 https://github.com/gjmurakami-10gen/talk-mother-lode file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 1/26
10/19/12 Introduction to MongoDB and Ruby THE CALIFORNIA GOLD RUSH OF 1849 file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 2/26
10/19/12 Introduction to MongoDB and Ruby file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 3/26
10/19/12 Introduction to MongoDB and Ruby MONGODB: RUBY'S MOTHER LODE Ruby is a gem of a programming language dynamic, multi-paradigm expressive, powerful, enjoyable MongoDB is the mother lode of DBs BSON documents, high-performance indexing, replication, sharding flexible, powerful, enjoyable Ruby and MongoDB are well matched file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 4/26
10/19/12 Introduction to MongoDB and Ruby OUTFITTING BEYOND YOUR PICKAXE BOOK MAC OS X - MONGODB QUICKSTART $be udt rw pae $be isalmnob rw ntl ogd $mno ogd RUBY DRIVER SETUP - RUBY LANGUAGE CENTER $gmisalmno e ntl og $gmisalbo_x e ntl snet Gemfile gm'og' e mno gm'snet e bo_x' RUBYMINE IDE includes support for Mongoid and MongoDB file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 5/26
10/19/12 Introduction to MongoDB and Ruby LET'S DIG IN TWITTER FRIENDS - LOAD USERS rqie'og' eur mno rqie'tplet eur htcin' rqie'sn eur jo' sre_ae=AG[]| 'ayuaai cennm RV0 | grmrkm' finsisui="tp:/p.wte.o//red/d.sncro=1sre_ae#sre_ae" red_d_r hts/aititrcm1finsisjo?usr-&cennm={cennm} fin_d =JO.as(TPletgtfinsisui.oy[is] redis SNpreHTCin.e(red_d_r)bd)'d' a few lines of Ruby gets and parses JSON data from the web - twitter API libraries/gems mongo, bson, bson_ext httpclient, json language capability method call chaining file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 6/26
10/19/12 Introduction to MongoDB and Ruby TWITTER FRIENDS - LOAD USERS (CONTINUED) cneto =Mno:oncinnw oncin og:Cneto.e d =cneto[titr] b oncin'wte' cleto =d[ues] olcin b'sr' fin_d.ahsie10 d |d|#bs patcs redisec_lc(0) o is et rcie ueslou_r ="tp:/p.wte.o//sr/okpjo?sri={d.on''} sr_okpui hts/aititrcm1ueslou.snue_d#isji(,)" rsos =HTCin.e(sr_okpui epne TPletgtueslou_r) dc =JO.as(epnebd)#hg-ee ojcs-Aryo Hse os SNprersos.oy ihlvl bet ra f ahs dc.ah|o|dc'i' =dc'd] #ue sple _d osec{dc o[_d] o[i'} sr upid i cleto.netdc,:ae= tu)#n shm!-bl isr -bs patcs olcinisr(os sf > re o cea uk net et rcie ed n pt "sr:{olcincut" us ues#cleto.on} a small number of lines load JSON data from the web into a collection DB connection, database, collection docs - Ruby Array of Hashes from JSON parsing doc primary _id set by user or driver collection bulk insert and safe mode collection count file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 7/26
10/19/12 Introduction to MongoDB and Ruby HITTING PAYDIRT TWITTER TOP 10 USERS BY FOLLOWERS COUNT ues=Mno:oncinnw'wte'[ues] sr og:Cneto.e[titr]'sr' uesfn(} :ot= {floescut - } :ii = 1)ec d |o| sr.id{, sr > olwr_on: 1 , lmt > 0.ah o dc pt dcvle_t'olwr_on' 'cennm'.on"t) us o.ausa(floescut, sre_ae)ji(" ed n a simple query with sort and limit find - cursor enumerable expressed in Ruby code driver serializes into BSON and Mongo Wire Protocol no text language generation or parsing 1023 491 Dobx rpo 202 59 MnoB ogD 97 04 ocn so 84 18 risof alcn 70 32 sf3 p1 47 34 1gn 0e 25 29 khdrw cooo 12 95 rt i 19 25 der mr 14 18 arnekan aohcmn file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 8/26
10/19/12 Introduction to MongoDB and Ruby DIGGING DEEPER TWITTER - LOAD TWEETS (SIMPLIFIED) d =Mno:oncinnw'wte' b og:Cneto.e[titr] ues=d[ues] sr b'sr' tet =d[tet' wes b'wes] tet.nueidx'sri' #dtntto t seiysbil wesesr_ne(ue.d) o oain o pcf ufed uesfn(} {ils {d tu,sre_ae tu,snei:tu})ec d |sr sr.id{, fed: i: re cennm: re ic_d re}.ah o ue| titrue_ieieui= "tp:/p.wte.o//ttssue_ieiejo?sri={s wte_srtmln_r hts/aititrcm1saue/srtmln.snue_d#u e[i'}cut20icuerstu&otiuo_eal=re r'd]&on=0&nld_t=recnrbtrdtistu" titrue_ieieui+ "ic_d#ue[snei'} i ue[snei' wte_srtmln_r = snei={sr'ic_d]" f sr'ic_d] rsos =HTCin.e(wte_srtmln_r) epne TPletgttitrue_ieieui dc =JO.as(epnebd)#hg-ee ojcs os SNprersos.oy ihlvl bet dc.ah|o|dc'i' =dc'd] #ue sple _d osec{dc o[_d] o[i'} sr upid i tet.netdc,:otneo_ro = tu)#bl isr wesisr(os cniu_nerr > re uk net uesudt(_d ue[_d],{$e'= {snei'= dc.at'd]} sr.pae{i: sr'i'} 'st > 'ic_d > osls[i'}) pt tet.on(qey= {ue.d = ue[i'} us wescut:ur > 'sri' > sr'd]) ed n pt "wes#tet.on} us tet:{wescut" a small number of lines loads and records tweets indexing - secondary indexes retrieving a subset of fields update - record since_id count with query selector file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 9/26
10/19/12 Introduction to MongoDB and Ruby TWITTER TOP 10 TWEETS FOR MONGODB BY RETWEET_COUNT tet =Mno:oncinnw'wte'[tet' wes og:Cneto.e[titr]'wes] sre_ae='ogD' cennm MnoB tet.id{ue.cennm'= sre_ae,:ot= {rtetcut - } :ii = 1)ec wesfn('srsre_ae > cennm} sr > ewe_on: 1 , lmt > 0.ah d |o| o dc pt dcvle_t'ewe_on' 'et)ji(" us o.ausa(rtetcut, tx'.on"t) ed n a simple query with a query selector, sort and limit MongoDB query language dot notation for nested sub-document fields 12#ogD v. rlae ht:/.os6z7 7 MnoB 22 eesd tp/tc/NRcD 7 #ogD2o2ofcal rlae,w Avne AgeainFaeok MliDt Cne Dpomn 7 mnoBdt fiily eesd / dacd grgto rmwr, ut-aa etr elyet +60nwfaue ht:/.oDSWw 0 e etrs tp/tc/MdGN 5 Anucn fe oln MnoBcass ht:/.oRobl 9 nonig re nie ogD lse. tp/tc/IA77 3 R @mkl:Itouigmnop afotn fr#ogD' qeypoie hts/tc/OSsW 0 T jioa nrdcn ogq: rned o MnoBs ur rflr tp:/.oRCz6 2 Sg u frfe oln MnoBcusssatn i Otbrht:/.oI6QN 9 in p o re nie ogD ore trig n coe tp/tc/m84M 2 100 hv sge u frfe MnoBtann snetecusswr anucdtdyht:/.o 4 ,0+ ae ind p o re ogD riig ic h ore ee none oa tp/tc /IxHt oNf1 2 HwDse bitabgdt pafr o asatpbde uigMnoB ht:/.o8Wy7 2 o iny ul i aa ltom n tru ugt sn ogD. tp/tc/q5cT 2 #ogD2o2 aalbefrdwla.ht:/.okGUh 1 mnoBdt, vial o onod tp/tc/chDI 1 MnoBSadn Vsaie ht:/.ooI0j aohrpouto #0eLb 9 ogD hrig iulzr tp/tc/nG8v nte rdc f 1gnas 1 MnoBJv Die 290rlae ht:/.oUvoY 6 ogD aa rvr .. eesd tp/tc/DZAV file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 10/26
10/19/12 Introduction to MongoDB and Ruby STRIKING GOLD BSON - BINARY JSON http://bsonspec.org/ {BO" [aeoe,50,18] "SN: "wsm" .5 96} → "x1x0x0x0 3000 0BO0 x4SNx0 &x0x0x0 000 00x0x8x0x0x0wsm0 x200000aeoex0 01x0333x4 x103331@ 12x0x2x7x0x0 x00c000 0 x0 0" x0 1. base types extended to match modern programming languages 2. transfer over wire - Mongo Wire Protocol request payload includes query and documents to server response and documents to client 3. store on server disk 4. index on server fast - no parsing, no server-side data repackaging to disk file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 11/26
10/19/12 Introduction to MongoDB and Ruby REPLICA SETS multiple database server nodes one primary member, many secondary members file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 12/26
10/19/12 Introduction to MongoDB and Ruby high availability auto-failover via election by majority write concern read scaling - read preferences backups upgrades use (hidden) replica for secondary workload analytics data-processing integration with external systems file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 13/26
10/19/12 Introduction to MongoDB and Ruby SHARDING horizontal scaling across multiple nodes file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 14/26
10/19/12 Introduction to MongoDB and Ruby horizontal scaling across multiple nodes automatic balancing failover - each shard can be a replica set shard key - partition by range chunks up to 64MB routing processes - mongos file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 15/26
10/19/12 Introduction to MongoDB and Ruby NUGGETS - MORE MONGODB FEATURES mongo shell JavaScript, native for server-side processing highly recommended for development and administration map/reduce batch processing of data and aggregation operations aggregation framework calculate aggregated values without having to use map-reduce pipeline, operators, expressions GridFS specification for storing large files in MongoDB chunks usually 256KB Capped collections fixed sized collections that have a very high performance auto-FIFO age- out feature Hadoop connector reading MongoDB data into Hadoop as well as writing map/reduce results back out file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 16/26
10/19/12 Introduction to MongoDB and Ruby FULL-BORE MINING WITH WEB FRAMEWORKS Ruby on Rails, Sinatra, etc. MONGOMAPPER ODM - JOHN NUNEMAKER casUe ls sr icueMnoapr:ouet nld ogMpe:Dcmn ky:ae Srn e nm, tig ky:g, Itgr e ae nee mn :obe ay hbis ed n casHby ls ob icueMnoapr:meddouet nld ogMpe:EbdeDcmn ky:ae e nm, Srn tig ky:tre,Tm e satd ie ed n ue =Ue.e(nm = 'rno' sr srnw:ae > Badn) ue.obe.ul(nm = 'rgamn' :tre = 1.er.g) srhbisbid:ae > Pormig, satd > 0yasao ue.ae srsv! Ue.hr(nm = 'rno'.is srwee:ae > Badn)frt simplified model different from ActiveRecord good example for Ruby metaprogramming small is beautiful file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 17/26
10/19/12 Introduction to MongoDB and Ruby MONGOID ODM - DURRAN JORDAN casAts ls rit icueMnod:ouet nld ogi:Dcmn fed:ae tp:Srn il nm, ye tig ebd_ay:ntuet mesmn isrmns ed n casIsrmn ls ntuet icueMnod:ouet nld ogi:Dcmn fed:ae tp:Srn il nm, ye tig ebde_n:rit meddi ats ed n sd=Ats.hr(ae "y Vcos)btenae 1.2)frt y ritweenm: Sd iiu".ewe(g: 8.5.is sdisrmnscet(ae "as) y.ntuet.raenm: Bs" sdwt(aaae "ad" ssin "akp)sv! y.ihdtbs: bns, eso: bcu".ae documents persistence querying ActiveModel relations (belongs_to, has_one, has_many, habtm) nested attributes validation indexing extras file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 18/26
10/19/12 Introduction to MongoDB and Ruby MOPED DRIVER - BERNERD SCHAEFER ssin=Mpd:eso.e( "2...:71"] eso oe:Ssinnw[ 17001207 ) ssinue"cots" eso.s eh_et ssinwt(ae tu)d |ae eso.ihsf: re o sf| sf[atss.netnm:"y Vcos) ae:rit]isr(ae Sd iiu" ed n ssin:rit]fn(ae "y Vcos)udt($uh= {isrmns {nm:"as }) eso[atss.idnm: Sd iiu".pae:ps > ntuet: ae Bs" } a MongoDB driver for Ruby which exposes a simple, elegant, and fast API fast, thread-safe, uses sidekiq pure Ruby - no C extensions metaprogramming - extends standard classes Ruby > 1.9 used by Mongoid 3 file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 19/26
10/19/12 Introduction to MongoDB and Ruby JRUBY The Best of the JVM High performance Real threading - multi-core parallelism Vast array of libraries It's Just Ruby Ruby 1.8.7 & 1.9.2 compatible Both versions in single install bson_java Mongo Hadoop connector file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 20/26
10/19/12 Introduction to MongoDB and Ruby FOOL'S GOLD - RDBMS CASE STUDY ADOBE PHOTOSHOP LIGHTROOM "Lightroom 3 Catalog.lrcat" 0.5 GB 66 Sqlite3 tables 20 tables with column image INTEGER can be loaded with 40 lines of Ruby can be reduced to 1 image collection THE COST OF USING RDBMS FOR PERSISTENCE RDBMS flattened and normalized our data into rigid tables RDBMS costs O(10**6) - O(1000000) and more with many joins Memory O(10**9/sec) - O(1000000000) RDBMS O(10**3/sec) - O(1000) file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 21/26
10/19/12 Introduction to MongoDB and Ruby THE MOTHER LODE MONGODB SUMMARY replica sets for high availability sharded clusters for scaling very high performance secondary indices BSON is fast for transfer, storage, queries server-side processing map-reduce, aggregation Hadoop connector very low cost - open source - community file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 22/26
10/19/12 Introduction to MongoDB and Ruby MONGODB CONCLUSION enjoyable software development 10gen and Moped Ruby drivers MongoMapper and Mongoid ODMs no schema migrations forced well-matched to programming languages bigger data Ruby and objects file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 23/26
10/19/12 Introduction to MongoDB and Ruby ANNOUNCEMENT AND QUESTIONS MONGODB AND RUBY BLOGGING CONTEST Objective Write about best practices for using MongoDB with Ruby. Post your blog posts in the comments section of this blog post by October 10 to be entered to win. http://blog.10gen.com/post/32158163299/mongodb-and-ruby-blogging- contest Google: mongodb and ruby blogging contest file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 24/26
10/19/12 Introduction to MongoDB and Ruby THANK YOU AND MAY YOU STRIKE GOLD { nm:"ayJ Mrkm,P.., ae Gr . uaai hD" tte "edEgne adRb Eagls" il: La nier n uy vneit, cmay "0e (h MnoBcmay" opn: 1gn te ogD opn), poe "-6-3-85x05, hn: 1862781 81" mbl:"-0-8-61, oie 1987762" eal "aymrkm@0e.o" mi: gr.uaai1gncm, i:"juaai(I), m gmrkm AM" titr "GrMrkm" wte: @ayuaai, bo:"ryhswie.lgptcm, lg gagotrtrboso.o" wbie "w.oelog, est: wwnbl.r" lnei:"w.ikdncmpbgr-uaai13a37, ikdn wwlnei.o/u/aymrkm//6/2" fcbo:"aeokcmgr..uaai aeok fcbo.o/ayjmrkm" } https://github.com/gjmurakami-10gen/talk-mother-lode git://github.com/gjmurakami-10gen/talk-mother-lode.git MongoDB Ruby Language Center Github mongodb/mongo-ruby-driver file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 25/26

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Introduction to MongoDB and Ruby

  • 1. 10/19/12 Introduction to MongoDB and Ruby INTRODUCTION TO MONGODB AND RUBY Gary J. Murakami, Ph.D. Lead Engineer & Ruby Evangelist 10gen (the MongoDB company) [email protected] Tuesday, September 25, 2012 https://github.com/gjmurakami-10gen/talk-mother-lode file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 1/26
  • 2. 10/19/12 Introduction to MongoDB and Ruby THE CALIFORNIA GOLD RUSH OF 1849 file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 2/26
  • 3. 10/19/12 Introduction to MongoDB and Ruby file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 3/26
  • 4. 10/19/12 Introduction to MongoDB and Ruby MONGODB: RUBY'S MOTHER LODE Ruby is a gem of a programming language dynamic, multi-paradigm expressive, powerful, enjoyable MongoDB is the mother lode of DBs BSON documents, high-performance indexing, replication, sharding flexible, powerful, enjoyable Ruby and MongoDB are well matched file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 4/26
  • 5. 10/19/12 Introduction to MongoDB and Ruby OUTFITTING BEYOND YOUR PICKAXE BOOK MAC OS X - MONGODB QUICKSTART $be udt rw pae $be isalmnob rw ntl ogd $mno ogd RUBY DRIVER SETUP - RUBY LANGUAGE CENTER $gmisalmno e ntl og $gmisalbo_x e ntl snet Gemfile gm'og' e mno gm'snet e bo_x' RUBYMINE IDE includes support for Mongoid and MongoDB file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 5/26
  • 6. 10/19/12 Introduction to MongoDB and Ruby LET'S DIG IN TWITTER FRIENDS - LOAD USERS rqie'og' eur mno rqie'tplet eur htcin' rqie'sn eur jo' sre_ae=AG[]| 'ayuaai cennm RV0 | grmrkm' finsisui="tp:/p.wte.o//red/d.sncro=1sre_ae#sre_ae" red_d_r hts/aititrcm1finsisjo?usr-&cennm={cennm} fin_d =JO.as(TPletgtfinsisui.oy[is] redis SNpreHTCin.e(red_d_r)bd)'d' a few lines of Ruby gets and parses JSON data from the web - twitter API libraries/gems mongo, bson, bson_ext httpclient, json language capability method call chaining file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 6/26
  • 7. 10/19/12 Introduction to MongoDB and Ruby TWITTER FRIENDS - LOAD USERS (CONTINUED) cneto =Mno:oncinnw oncin og:Cneto.e d =cneto[titr] b oncin'wte' cleto =d[ues] olcin b'sr' fin_d.ahsie10 d |d|#bs patcs redisec_lc(0) o is et rcie ueslou_r ="tp:/p.wte.o//sr/okpjo?sri={d.on''} sr_okpui hts/aititrcm1ueslou.snue_d#isji(,)" rsos =HTCin.e(sr_okpui epne TPletgtueslou_r) dc =JO.as(epnebd)#hg-ee ojcs-Aryo Hse os SNprersos.oy ihlvl bet ra f ahs dc.ah|o|dc'i' =dc'd] #ue sple _d osec{dc o[_d] o[i'} sr upid i cleto.netdc,:ae= tu)#n shm!-bl isr -bs patcs olcinisr(os sf > re o cea uk net et rcie ed n pt "sr:{olcincut" us ues#cleto.on} a small number of lines load JSON data from the web into a collection DB connection, database, collection docs - Ruby Array of Hashes from JSON parsing doc primary _id set by user or driver collection bulk insert and safe mode collection count file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 7/26
  • 8. 10/19/12 Introduction to MongoDB and Ruby HITTING PAYDIRT TWITTER TOP 10 USERS BY FOLLOWERS COUNT ues=Mno:oncinnw'wte'[ues] sr og:Cneto.e[titr]'sr' uesfn(} :ot= {floescut - } :ii = 1)ec d |o| sr.id{, sr > olwr_on: 1 , lmt > 0.ah o dc pt dcvle_t'olwr_on' 'cennm'.on"t) us o.ausa(floescut, sre_ae)ji(" ed n a simple query with sort and limit find - cursor enumerable expressed in Ruby code driver serializes into BSON and Mongo Wire Protocol no text language generation or parsing 1023 491 Dobx rpo 202 59 MnoB ogD 97 04 ocn so 84 18 risof alcn 70 32 sf3 p1 47 34 1gn 0e 25 29 khdrw cooo 12 95 rt i 19 25 der mr 14 18 arnekan aohcmn file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 8/26
  • 9. 10/19/12 Introduction to MongoDB and Ruby DIGGING DEEPER TWITTER - LOAD TWEETS (SIMPLIFIED) d =Mno:oncinnw'wte' b og:Cneto.e[titr] ues=d[ues] sr b'sr' tet =d[tet' wes b'wes] tet.nueidx'sri' #dtntto t seiysbil wesesr_ne(ue.d) o oain o pcf ufed uesfn(} {ils {d tu,sre_ae tu,snei:tu})ec d |sr sr.id{, fed: i: re cennm: re ic_d re}.ah o ue| titrue_ieieui= "tp:/p.wte.o//ttssue_ieiejo?sri={s wte_srtmln_r hts/aititrcm1saue/srtmln.snue_d#u e[i'}cut20icuerstu&otiuo_eal=re r'd]&on=0&nld_t=recnrbtrdtistu" titrue_ieieui+ "ic_d#ue[snei'} i ue[snei' wte_srtmln_r = snei={sr'ic_d]" f sr'ic_d] rsos =HTCin.e(wte_srtmln_r) epne TPletgttitrue_ieieui dc =JO.as(epnebd)#hg-ee ojcs os SNprersos.oy ihlvl bet dc.ah|o|dc'i' =dc'd] #ue sple _d osec{dc o[_d] o[i'} sr upid i tet.netdc,:otneo_ro = tu)#bl isr wesisr(os cniu_nerr > re uk net uesudt(_d ue[_d],{$e'= {snei'= dc.at'd]} sr.pae{i: sr'i'} 'st > 'ic_d > osls[i'}) pt tet.on(qey= {ue.d = ue[i'} us wescut:ur > 'sri' > sr'd]) ed n pt "wes#tet.on} us tet:{wescut" a small number of lines loads and records tweets indexing - secondary indexes retrieving a subset of fields update - record since_id count with query selector file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 9/26
  • 10. 10/19/12 Introduction to MongoDB and Ruby TWITTER TOP 10 TWEETS FOR MONGODB BY RETWEET_COUNT tet =Mno:oncinnw'wte'[tet' wes og:Cneto.e[titr]'wes] sre_ae='ogD' cennm MnoB tet.id{ue.cennm'= sre_ae,:ot= {rtetcut - } :ii = 1)ec wesfn('srsre_ae > cennm} sr > ewe_on: 1 , lmt > 0.ah d |o| o dc pt dcvle_t'ewe_on' 'et)ji(" us o.ausa(rtetcut, tx'.on"t) ed n a simple query with a query selector, sort and limit MongoDB query language dot notation for nested sub-document fields 12#ogD v. rlae ht:/.os6z7 7 MnoB 22 eesd tp/tc/NRcD 7 #ogD2o2ofcal rlae,w Avne AgeainFaeok MliDt Cne Dpomn 7 mnoBdt fiily eesd / dacd grgto rmwr, ut-aa etr elyet +60nwfaue ht:/.oDSWw 0 e etrs tp/tc/MdGN 5 Anucn fe oln MnoBcass ht:/.oRobl 9 nonig re nie ogD lse. tp/tc/IA77 3 R @mkl:Itouigmnop afotn fr#ogD' qeypoie hts/tc/OSsW 0 T jioa nrdcn ogq: rned o MnoBs ur rflr tp:/.oRCz6 2 Sg u frfe oln MnoBcusssatn i Otbrht:/.oI6QN 9 in p o re nie ogD ore trig n coe tp/tc/m84M 2 100 hv sge u frfe MnoBtann snetecusswr anucdtdyht:/.o 4 ,0+ ae ind p o re ogD riig ic h ore ee none oa tp/tc /IxHt oNf1 2 HwDse bitabgdt pafr o asatpbde uigMnoB ht:/.o8Wy7 2 o iny ul i aa ltom n tru ugt sn ogD. tp/tc/q5cT 2 #ogD2o2 aalbefrdwla.ht:/.okGUh 1 mnoBdt, vial o onod tp/tc/chDI 1 MnoBSadn Vsaie ht:/.ooI0j aohrpouto #0eLb 9 ogD hrig iulzr tp/tc/nG8v nte rdc f 1gnas 1 MnoBJv Die 290rlae ht:/.oUvoY 6 ogD aa rvr .. eesd tp/tc/DZAV file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 10/26
  • 11. 10/19/12 Introduction to MongoDB and Ruby STRIKING GOLD BSON - BINARY JSON http://bsonspec.org/ {BO" [aeoe,50,18] "SN: "wsm" .5 96} → "x1x0x0x0 3000 0BO0 x4SNx0 &x0x0x0 000 00x0x8x0x0x0wsm0 x200000aeoex0 01x0333x4 x103331@ 12x0x2x7x0x0 x00c000 0 x0 0" x0 1. base types extended to match modern programming languages 2. transfer over wire - Mongo Wire Protocol request payload includes query and documents to server response and documents to client 3. store on server disk 4. index on server fast - no parsing, no server-side data repackaging to disk file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 11/26
  • 12. 10/19/12 Introduction to MongoDB and Ruby REPLICA SETS multiple database server nodes one primary member, many secondary members file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 12/26
  • 13. 10/19/12 Introduction to MongoDB and Ruby high availability auto-failover via election by majority write concern read scaling - read preferences backups upgrades use (hidden) replica for secondary workload analytics data-processing integration with external systems file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 13/26
  • 14. 10/19/12 Introduction to MongoDB and Ruby SHARDING horizontal scaling across multiple nodes file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 14/26
  • 15. 10/19/12 Introduction to MongoDB and Ruby horizontal scaling across multiple nodes automatic balancing failover - each shard can be a replica set shard key - partition by range chunks up to 64MB routing processes - mongos file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 15/26
  • 16. 10/19/12 Introduction to MongoDB and Ruby NUGGETS - MORE MONGODB FEATURES mongo shell JavaScript, native for server-side processing highly recommended for development and administration map/reduce batch processing of data and aggregation operations aggregation framework calculate aggregated values without having to use map-reduce pipeline, operators, expressions GridFS specification for storing large files in MongoDB chunks usually 256KB Capped collections fixed sized collections that have a very high performance auto-FIFO age- out feature Hadoop connector reading MongoDB data into Hadoop as well as writing map/reduce results back out file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 16/26
  • 17. 10/19/12 Introduction to MongoDB and Ruby FULL-BORE MINING WITH WEB FRAMEWORKS Ruby on Rails, Sinatra, etc. MONGOMAPPER ODM - JOHN NUNEMAKER casUe ls sr icueMnoapr:ouet nld ogMpe:Dcmn ky:ae Srn e nm, tig ky:g, Itgr e ae nee mn :obe ay hbis ed n casHby ls ob icueMnoapr:meddouet nld ogMpe:EbdeDcmn ky:ae e nm, Srn tig ky:tre,Tm e satd ie ed n ue =Ue.e(nm = 'rno' sr srnw:ae > Badn) ue.obe.ul(nm = 'rgamn' :tre = 1.er.g) srhbisbid:ae > Pormig, satd > 0yasao ue.ae srsv! Ue.hr(nm = 'rno'.is srwee:ae > Badn)frt simplified model different from ActiveRecord good example for Ruby metaprogramming small is beautiful file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 17/26
  • 18. 10/19/12 Introduction to MongoDB and Ruby MONGOID ODM - DURRAN JORDAN casAts ls rit icueMnod:ouet nld ogi:Dcmn fed:ae tp:Srn il nm, ye tig ebd_ay:ntuet mesmn isrmns ed n casIsrmn ls ntuet icueMnod:ouet nld ogi:Dcmn fed:ae tp:Srn il nm, ye tig ebde_n:rit meddi ats ed n sd=Ats.hr(ae "y Vcos)btenae 1.2)frt y ritweenm: Sd iiu".ewe(g: 8.5.is sdisrmnscet(ae "as) y.ntuet.raenm: Bs" sdwt(aaae "ad" ssin "akp)sv! y.ihdtbs: bns, eso: bcu".ae documents persistence querying ActiveModel relations (belongs_to, has_one, has_many, habtm) nested attributes validation indexing extras file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 18/26
  • 19. 10/19/12 Introduction to MongoDB and Ruby MOPED DRIVER - BERNERD SCHAEFER ssin=Mpd:eso.e( "2...:71"] eso oe:Ssinnw[ 17001207 ) ssinue"cots" eso.s eh_et ssinwt(ae tu)d |ae eso.ihsf: re o sf| sf[atss.netnm:"y Vcos) ae:rit]isr(ae Sd iiu" ed n ssin:rit]fn(ae "y Vcos)udt($uh= {isrmns {nm:"as }) eso[atss.idnm: Sd iiu".pae:ps > ntuet: ae Bs" } a MongoDB driver for Ruby which exposes a simple, elegant, and fast API fast, thread-safe, uses sidekiq pure Ruby - no C extensions metaprogramming - extends standard classes Ruby > 1.9 used by Mongoid 3 file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 19/26
  • 20. 10/19/12 Introduction to MongoDB and Ruby JRUBY The Best of the JVM High performance Real threading - multi-core parallelism Vast array of libraries It's Just Ruby Ruby 1.8.7 & 1.9.2 compatible Both versions in single install bson_java Mongo Hadoop connector file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 20/26
  • 21. 10/19/12 Introduction to MongoDB and Ruby FOOL'S GOLD - RDBMS CASE STUDY ADOBE PHOTOSHOP LIGHTROOM "Lightroom 3 Catalog.lrcat" 0.5 GB 66 Sqlite3 tables 20 tables with column image INTEGER can be loaded with 40 lines of Ruby can be reduced to 1 image collection THE COST OF USING RDBMS FOR PERSISTENCE RDBMS flattened and normalized our data into rigid tables RDBMS costs O(10**6) - O(1000000) and more with many joins Memory O(10**9/sec) - O(1000000000) RDBMS O(10**3/sec) - O(1000) file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 21/26
  • 22. 10/19/12 Introduction to MongoDB and Ruby THE MOTHER LODE MONGODB SUMMARY replica sets for high availability sharded clusters for scaling very high performance secondary indices BSON is fast for transfer, storage, queries server-side processing map-reduce, aggregation Hadoop connector very low cost - open source - community file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 22/26
  • 23. 10/19/12 Introduction to MongoDB and Ruby MONGODB CONCLUSION enjoyable software development 10gen and Moped Ruby drivers MongoMapper and Mongoid ODMs no schema migrations forced well-matched to programming languages bigger data Ruby and objects file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 23/26
  • 24. 10/19/12 Introduction to MongoDB and Ruby ANNOUNCEMENT AND QUESTIONS MONGODB AND RUBY BLOGGING CONTEST Objective Write about best practices for using MongoDB with Ruby. Post your blog posts in the comments section of this blog post by October 10 to be entered to win. http://blog.10gen.com/post/32158163299/mongodb-and-ruby-blogging- contest Google: mongodb and ruby blogging contest file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 24/26
  • 25. 10/19/12 Introduction to MongoDB and Ruby THANK YOU AND MAY YOU STRIKE GOLD { nm:"ayJ Mrkm,P.., ae Gr . uaai hD" tte "edEgne adRb Eagls" il: La nier n uy vneit, cmay "0e (h MnoBcmay" opn: 1gn te ogD opn), poe "-6-3-85x05, hn: 1862781 81" mbl:"-0-8-61, oie 1987762" eal "[email protected]" mi: gr.uaai1gncm, i:"juaai(I), m gmrkm AM" titr "GrMrkm" wte: @ayuaai, bo:"ryhswie.lgptcm, lg gagotrtrboso.o" wbie "w.oelog, est: wwnbl.r" lnei:"w.ikdncmpbgr-uaai13a37, ikdn wwlnei.o/u/aymrkm//6/2" fcbo:"aeokcmgr..uaai aeok fcbo.o/ayjmrkm" } https://github.com/gjmurakami-10gen/talk-mother-lode git://github.com/gjmurakami-10gen/talk-mother-lode.git MongoDB Ruby Language Center Github mongodb/mongo-ruby-driver file:///Users/gjm/10gen/talk‑mother‑lode/index.html?print‑pdf#/ 25/26