My first moments with MongoDB
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The document provides an overview of MongoDB, describing it as a document-oriented database that is flexible and designed for modern applications. It outlines its advantages, notable users, and various components including storage engines, distributions, backups, and monitoring tools. Additionally, it lists resources for further learning and production notes for optimal configuration.
My first moments with MongoDB
- 1. My First Moments with MongoDB Colin Charles byte@bytebot.net | @bytebot | http://bytebot.net/blog/ Community Open House, New York City, New York, USA 30 June 2016
- 2. whoami • Work on MariaDB Server at MariaDB Corporation (SkySQL Ab) • Merged with Monty Program Ab, makers of MariaDB • Formerly MySQL AB (exit: Sun Microsystems) • Past lives include Fedora Project (FESCO), OpenOffice.org • MySQL Community Contributor of the Year Award winner 2014
- 3. Agenda • What is MongoDB? • Why MongoDB? • Who uses MongoDB? • Where is MongoDB found? • Storage Engines • Distributions • Replication • Backups • Monitoring • DBaaS • Production • Resources
- 4. Research Papers • 1970 E.F. Codd paper “A Relational Model of Data for Large Shared Data Banks” • 2004 Google paper “MapReduce: Simplified Data Processing on Large Clusters” -> Hadoop ~2008 “big data movement” • 2006 Google paper “BigTable: A Distributed Storage System for Structured Data” -> Cassandra/HBase/LevelDB ~2009 • 2007 Amazon paper “Dynamo: Amazon’s Highly Available Key- value Store” -> Aerospike/Cassandra/Voldemort/Riak • 2012 Google paper “Spanner: Google’s Globally-Distributed Database” -> CockroachDB
- 5. What is MongoDB? • Document oriented database • data stored in documents, not tables/relations • JSON • JavaScript • Flexible schema • no downtime for field (column) changes or index creation
- 6. Why MongoDB? • “After three years it has become clear that in terms of LinkedIn member profiles there is only one trend: the total dominance of MongoDB.” - Matt Aslett, 451 Group • Agile development • No additional caching layer required • Built in replication with automatic failover + sharding out of the box
- 7. Who uses MongoDB? • Craigslist • Facebook’s Parse • Business Insider • Foursquare • Stripe
- 8. Where is MongoDB found? • All manner of Linux distributions • MongoDB repositories: http://repo.mongodb.org/ • Works on Little Endian only (SERVER-1625) • Test databases (mongoimport) • http://media.mongodb.org/zips.json • https://docs.mongodb.com/getting-started/shell/import-data/ (primer-dataset.json restaurants) • https://docs.mongodb.com/manual/reference/program/
- 9. Storage Engines • MMAPv1 (B-Tree) • WiredTiger (B-Tree, LSM) • MongoRocks (LSM) • (PerconaFT, formerly TokuMX/TokuKV) • In-memory engine (Enterprise)
- 10. Distributions of MongoDB • MongoDB • MongoDB Enterprise • Percona Server for MongoDB • MongoRocks, audit logging, SASL authentication,
- 11. Replication • Node: single mongod process • Majority • Replica set: group of nodes. HA via elections. All members are equal by default + replicate to each other asynchronously • Oplog: capped collection, idempotent
- 12. Replication II • Shard: replica sets are groups. Queries filtered for data chunk holds • Config servers: metadata for sharded clusters
- 13. Backups • mongodump / mongorestore • filesystem snapshots (LVM) • rocks-strata (MongoRocks); TokuBackup (PerconaFT) • $: Ops Manager / Cloud Manager
- 14. Monitoring • mongostat • mongotop • db.serverStatus(), etc. • host of OSS tools • $aa$: Cloud Manager, New Relic, DataDog
- 15. DBaaS • mLab • ObjectRocket • Compose • MongoDB Atlas
- 16. Production Notes • Configure mongod.conf! • Follow through and you’ll be off to a good start • https://docs.mongodb.com/manual/ administration/production-notes/ • https://docs.mongodb.com/manual/ administration/production-checklist/
- 17. There’s more • Understanding aggregation framework • Sizing and provisioning • db.collection.stats(), .explain() • GIS functionality • Grants? There are roles in MongoDB! • Percona Toolkit? mlogsummary, mongo-summary
- 18. Books
- 19. Resources • MongoDB University - https:// university.mongodb.com/ • Quick Reference Cards - https:// www.mongodb.com/collateral/quick-reference- cards • The Little MongoDB Book (2.6) - https:// github.com/karlseguin/the-little-mongodb-book/ blob/master/en/mongodb.markdown
- 20. Thank You! byte@bytebot.net | @bytebot | http://bytebot.net/blog/ slides: slideshare.net/bytebot