MongoDB Administration ~ Kevin Hanson
- 1. Administration Kevin Hanson Solutions Architect, 10gen twitter: @hungarianhc kevin@10gen.com
- 3. Supported Platforms • OS X • Linux • Solaris • Windows • FreeBSD
- 4. The Basics ~ /bin • mongod: database server • mongo: shell • mongos: sharding router • mongodump: backup tool • mongostat: monitoring tool
- 5. Is it working? • Logs • Netstat • Try Out the Shell
- 6. Starting for Real • distro packages • --fork • --logpath • --quiet
- 7. Our Agenda • Replication • Monitoring • Backups • Queries + Indexes
- 8. Replication
- 9. Replication & The Oplog • Replication: Use It! • Mind the Oplog Size • Consider Delayed Replication
- 10. Replica Sets • One Primary, Many Secondaries • High Availability ~ Self Healing • Strongly Consistent • Hidden Nodes, Delayed SECONDARIES • Reading from SECONDARIES • If the PRIMARY goes down, can the remaining SECONDARIES handle the load? • Are You Okay With Less Up to Date Data? • If the answer to either question is no, stick with reading from PRIMARIES...
- 11. Replica Sets Node 1! Node 2! Secondary! Heartbeat+ Secondary! Node 3! Primary! Replication+ Replication+ • Replication is Asynchronous • Nodes Can Be in Different Datacenters • Tailing the Oplog • Monitor Secondary Delay + Oplog Size
- 12. A Look at the Oplog
- 13. Monitoring
- 14. MongoDB Monitoring Service • SaaS solution providing instrumentation and visibility into MongoDB systems • Free version released • 5,000+ customers using service • Installable Version Coming
- 16. Popular Monitoring Plugins • munin • ganglia • nagios • cacti
- 17. Popular Monitoring Plugins • munin • ganglia • nagios • cacti
- 18. iostat -x 2
- 19. mongostat
- 20. Backups
- 21. Mongodump • http://docs.mongodb.org/manual/reference/ mongodump/ • Binary Export • Best to Run Off Hidden Nodes / Delayed Secondaries
- 22. Filesystem Snapshots • Journaling... • If turned on, and on the same filesystem, snapshot at will. • If not on or mounted somewhere else, fsync lock required • Use a filesystem that supports snapshots :-)
- 25. Queries + Indexes • Note the Cursor Type (Btree vs. Basic) • Most Use-Cases: Queries Should be Indexed • Force No Table Scans • --notablescan • Indexes Should Fit in RAM • Indexes Slow Writes • Use them when you need them... • Don’t use them when you don’t... • Use the Slow Query Log
- 26. Viewing / Killing Ops
- 27. Download MongoDB http://www.mongodb.org and let us know what you think @hungarianhc @mongodb