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Mongo db admin_20110316
 

Mongo db admin_20110316

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MongoDB Administration Slides - Keynote version

MongoDB Administration Slides - Keynote version

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Mongo db admin_20110316 Mongo db admin_20110316 Presentation Transcript

  • Administration Michael DelNegro Principal Database Administrator AOL
  • About Me• DBA at AOL (Dulles) for six years• Background in Sybase• Now MySQL, PostgreSQL and NoSQL• I heart Big Data• Operations
  • MongoDB at AOL• In use since Summer 2010• I currently administer two applications for MapQuest and Patch• There are other MongoDB applications in use throughout the company and more on the way
  • MapQuest App• Tracks User Profile Information• V. 16.5.latest (just upgraded from 1.6.3)• 26 Total Hosts, CentOS 5, 16GB RAM• 300 million users, 130 million saved maps• Replica Sets• 3 Sharded Collections • lookup, east coast, west coast
  • Patch App• Tracks User Activity• Master, 2 Slaves• V. 1.6.3• About 100GB of data• Throwaway data (for now)
  • About Patch• “HyperLocal” news sites across the country• Fills gap in coverage left by local newspapers• Currently 800 sites are live• 1000+ by end of 2011
  • Nearby Patch Sites• Vienna (ex. vienna.patch.com)• Ashburn• Reston• McLean• CollegePark• GreaterAnnapolis• 50+ in DC Area
  • Upcoming Ops Plans• Upgrade to 1.8• Migrate Patch to Replica Sets• Move MapQuest to bigger hardware (16GB -> 64GB memory)• Add additional slaves
  • Admin Tips• Slaves are a MUST pre1.8• Use 64 bit version • 32 bit version has 2.5 GB storage limit• Use xfs or ext4• Keep eye on oplog size• Turn off atime & dtime• Consider using getLastError()
  • More Admin Tips• Increase File Descriptor Limits• Do not use kill -9 (pre-1.8)• Consider having a slave on replication delay • -- slavedelay <seconds>• db.runCommand(“logRotate”)• Keep db.<collection>.totalIndexSize() less than RAM
  • Even More Admin Tips• Omit parenthesis to see command details• 5 Primitives of Mongo • insert, remove, update, find, getMore• Replication is slave polling master process• Master and slaves each have their own oplog• Choose shard key carefully (ex. timestamp)
  • Admin Tools• mongodump-mongorestore • use fsync and lock database to ensure consistent backup• fsync and lock are a must for file system backups (ex LVM)• http://localhost:28017 (server port + 1000)• db.currentOp()
  • More Admin Tools• mongostat• db.printReplicationInfo()• db.serverStatus()• db.<collection>.stats()• Database Profiler• Explain
  • Admin Resources• mongodb.org • Events • Forums• Wordnik Mongo Admin Tools (Github)• Mongo Snippets (Github)• IRC (freenode #mongodb)
  • More Admin Resources• slideshare (use time-based search)• GUI Admin Tools • MongoVUE • Others• Kristina Chodorows Blog• Boxed Ice
  • Even More Resources• Follow @MongoQuestion (StackOverflow)• MongoDB on Quora (@q_mongodb)• 10gen Deployment Strategies Slides• Books• Training• 10gen Support
  • New MongoDB Release• 1.8 (Out Today! - March 16) • Single server durability (journaling) • Enhancements to sharding & replica sets • Covered indexes • Tab Completion • Rename fields without pulling down object
  • Future Releases• 2.0 (May/June?) • Better map-reduce and aggregation • Improved concurrency • Online compaction • TTL time-out collections• Beyond • full-text search?
  • Thank You!• www.slideshare.net/radiocats• @radiocats on Twitter• www.linkedin.com/in/mdelnegro