MongoDB开发应用实践

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2011qCon上视觉中国MongoDB开发应用实践

2011qCon上视觉中国MongoDB开发应用实践

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  • 1. QCon beijing 2011 MongoDB: http://czone.chinavisual.com/art/4b4501548f47e8ef73699a0c.html
  • 2. About.me• ( nightsailer) • @nightsailer //twitter,sina,linkedin, github ... • nightsailer # gmail.com • http://nightsailer.com/
  • 3. MongoDB NoSQL ?Auto-shard ?• No! 08 K/V MySQL
  • 4. App MMM • MySQL Percona Mysql(Master-Master) Master-Master-Slaves • HA:MMMMysql(M1) Mysql(M2) Slave Slave
  • 5. •• schema •••
  • 6. MySQL* JSON • schema •* • schema • query
  • 7. App MMM/vdb11 KV KV1 KV2Mysql(M1) Mysql(M2) Slave Slave
  • 8. Memcached• Memcached• KV
  • 9. • PHP/Perl• Memcached•••
  • 10. • Flare• Repcached• Redis• TC/TT
  • 11. Flare• cluster ,• Memcached
  • 12. 1•• • • • ;-(
  • 13. • Cassandra •• CouchDB •
  • 14. MongoDB• Redis• Document• Redis• MySQL ,• MySQL
  • 15. MySQL MongoDB• MySQL MongoDB• MySQL <=> MongoDB•
  • 16. MySQL• Transaction• Joins•
  • 17. ••1 1 90%• 35 table => 10 collection• happy!
  • 18. MongoDB, GridFS•• • MogileFS
  • 19. MongoDB,• SourceForge•• 10gen mailing-list• NoSQL MongoDB
  • 20. 1• comments:{ _id:ObjectId(‘xxx’), art_id:2, content: ‘ ...’, replied_on: 12233 created_on: 12222 replies: [{ _id: ObjectId(‘xxx’), content: ‘ , ...’, replies:[] }]}
  • 21. 2 / :••• / / ...)•
  • 22. 2• db.activity_stream.feed (• db.activity_stream.user )• db.activity_stream(
  • 23. 2feed• • follower collection • embed list
  • 24. 3: 1: Regex• 2: Sphinx• xml•
  • 25. 3: 3: Array/List ($all)•• PHP-SCWS• : • oplog
  • 26. MongoDB• Scons, Python• boost(CentOS)• static link mongod• tcmalloc
  • 27. • MongoDB( ICCCOMMON_CXXFLAGS=-fp-model source -unroll2 -axSSE4.1,SSE4.2 -xSSE3 -static-intel -fpic -fno-strict-aliasingCXXFLAGS="-O3 -ipo -static-libgcc $COMMON_CXXFLAGS"scons --release --static --extrapath=/opt/local --cxx=$CXX --icc --extralib=tcmalloc_minimal --icc-cxxflags="$CXXFLAGS" --icc-cppflags="$CPPFLAGS" -c $BIN_SERVERscons -j4 --release --static --extrapath=/opt/local --cxx=$CXX --icc--extralib=tcmalloc_minimal --icc-cxxflags="$CXXFLAGS" --icc-cppflags="$CPPFLAGS" $BIN_SERVER
  • 28. ••
  • 29. • Raid10• • XFS • Ext4 (?)
  • 30. PHP-FPM 2009/6, 0.9/1.0 • 1 Master + 2 slaves Nginx Mongod Master) Gearman-workers • 1m • 20g Mongod Slave)Gearman-workers • Dell 2850/4g(Master) 2*Dell 2950/4g(
  • 31. * Slave•* lvm snapshot•• fsync & lock db* mongodump•
  • 32. • mongostat / vmstat / iostat• collectd • : json-rest+perl plugin• Munion / Nagios ...
  • 33. MongoDB • CPU • 4G • IO:http://czone.chinavisual.com/art/4c7918b74979590970b80000.html
  • 34. 6:http://czone.chinavisual.com/art/4b45015496ddabef73f49197.html
  • 35. Why?• Map/Reduce /•• 1.6+ •** reIndex repairDatabase,
  • 36. 0:* MongoDB• Out of Memory!• v1.3* cursor• Perl driver bug,
  • 37. 0: 1:•• 2 2:• driver• driver
  • 38. 1:50x 502 Bad Gateway * GridFS • Perl Plack Starman/Plack Nginx Proxy storeMongoDB Disk Cache * GridFS • Nginx proxy_store •
  • 39. 1:50x504 Gateway timeout • • • Perl nginx_errorlog 5 mongodb.log• client
  • 40. 1:50x 3• XFS pre-allocation FS• for i in {1..50} do echo $i head -c 2146435072 /dev/zero > $db.$i done
  • 41. 2:• Mongod crash• Why? • Map/Reduce / •
  • 42. : http://czone.chinavisual.com/art/4cad0e08497959d621a10000.html
  • 43. • • 10 • MongoDB • Repair 5 • • 10: http://czone.chinavisual.com/art/4cad0e08497959d621a10000.html
  • 44. • MongoDB • • cluster : slave •
  • 45. 1• --syndelay • 60s(default) => 15~30s • IO• fsync •
  • 46. 2• 1.6.3, Master-Slaves RelicaSets • 1 Primary + 2 Secondary• 4g-8g• w=2 •
  • 47. 5••••
  • 48. :http://czone.chinavisual.com/art/4bd19d3b4979593e1a350000.html
  • 49. 4: RS fail-over• MongoDB • Primary kill 2 secondary • secondary
  • 50. 4: RS fail-over• 2 Arbitor • $ mongod --bind_ip 127.0.0.1,192.168.8.10 -- replSet rs10 --oplogSize 1 ... • > rs.addArb(‘192.168.8.10:27020’) • ...
  • 51. 4: RS fail-over 6: ReplicaSet• 1 Primary + 2 Secondary + n Arbitor••
  • 52. •6 “ ” • ;-( •• ReplicaSet fail-over secondary• Primary , •
  • 53. 1.8• 1.8 • journaling file • mongod -dur • crash repairDatabase•
  • 54. • GridFS • 10mb-500mb •
  • 55. • GridFS • Nginx proxy_store• MongoDB• ,Plack app • prefork
  • 56. • GridFS •• slaveOK• Plack app Twiggy AnyEvent
  • 57. Starman workers/PSGI Starman RS02 Nginx Gearman 127.0.0.1:9001 127.0.0.1:9002 127.0.0.1:9003 127.0.0.1:9004 Twiggy/PSGI RS01 (slaveOK)Sencondary
  • 58. •••
  • 59. Primary • Slave only IDCSecondary1 MongoD Secondary2 ReplicaSet1 • priority 0 VPN • VPN 2 IDC Slave1
  • 60. • >300ms • MongoDB
  • 61. • MongoDB • snapshot• • local.oplog.rs ( tailable cursor) • • replay oplog
  • 62. • 2• GridFS• VPN
  • 63. • VPN• GridFS• • BSON HTTP• mongod
  • 64. 7 • • • • unix: http://czone.chinavisual.com/art/4c05e7be4979596b7e570000.html
  • 65. Auto-sharding• 1.6GA Auto-sharding ••2 1 • •
  • 66. • Shard_key • shard key chunk • 4sq • shard_key• counting • chunk• balancer
  • 67. • • shard • shard•• 1.8
  • 68. •• MongoDB auto-shard• GA • 2.0+ ?
  • 69. MongoDB• MySQL Web• Schema free• Geo• MySQL• GridFS• sharding• Auto-sharding shared_key balancing 1.8/2.0
  • 70. Question? :http://czone.chinavisual.com/art/4b45015461be3def730e6351.html