CouchConf-Berlin-Couchbase-2.0-in-production

Couchbase Server 2.0 in ProductionFrank Weigel, Director Product Management, Couchbase Inc. 1

Couchbase Server 2.0: Overview = Simple. Fast. Elastic. • Membase + CouchDB • Managed memory caching layer = super high performance • Clustering and online data redistribution (Rebalancing) • Indexing and Querying via JSON Map-Reduce • New SDK’s and client libraries • Developer Preview available today! • http://www.couchbase.com/downloads 2

Let’s build a social game… www.facebook.com/farm_town_wars Load Balancer Web Servers Couchbase Servers 3

COUCHBASE SERVER 2.0 IN PRODUCTION: DEV/OPS LIFECYCLE Client setup Initial Setup Test DeployView Development Sizing Monitor Grow Maintain Upgrade Backup/Restore Failures 4

Couchbase Server 2.0 in Production: Initial Setup Extremely easy to get up and running: • RPM/deb/OSX/exe installation • Simple Web UI and setup wizard 5

Couchbase Server 2.0 in Production: Data and Indexes• Data goes “in and out” via the Memcached protocol• Queries/indexes are created and accessed via an HTTP protocol• Couchbase-provided SDK’s expose a single API to the developer and abstract the actual traffic 6

Couchbase Server 2.0 in production: Client-side Deployment Application server Farm Town Wars Farm Town Wars Application server App Code App Code Couchbase PHP Client Coucbase Java LIbrary client library Moxi (Couchbase proxy) OR 11210 5984 11210 5984 Query API Query API Couchbase Server Couchbase Server Couchbase Couchbase Client-side Moxi (“smart”) library 7

Couchbase Server 2.0 in Production: Data and IndexesExample JSON values: Example view:User_id:{ function (doc) { “farms”: *“one_farm”, “two_farm”+ for(var i in doc.animals) “animals”: *, if(doc.animals[i].sheep=="black") “pig”:”pink”, “sheep”:”black”, “chicken”:”yellow” + } emit(doc._id) }] “enemies”: *“you”, “U2”+} = List of black sheep owners 8

Couchbase Server 2.0 in Production: Data and Indexes• Indexes/views are based on incremental map-reduce: • Indexes are updated with incremental changes (not batch)• View processing is done per-node: • Parallel processing on subset of data • Couchbase provides scatter-gather aggregation 9

Couchbase Server 2.0 in Production: Data and Indexes• Views are “developed” off of a random (or specific) sampling of the overall dataset and then deployed • Faster • Less load on system• Updated views can be applied without rescanning entire dataset 10

COUCHBASE SERVER 2.0 IN PRODUCTION: DEV/OPS LIFECYCLE Client setup Deploy Sizing 11

Couchbase Server 2.0 in production: Sizing Sizing Question: How many nodes do I need? Considerations: RAM Disk Network Data Safety 12

Couchbase Server 2.0 in production: Sizing Sizing Question: How many nodes do I need? Considerations: RAM • Metadata Active+Replica • Working set • Buffer/overhead 13

Couchbase Server 2.0 in production: Sizing 500,000 keys to begin with: -20 bytes in length -average value size of 2k -metadata of about 150 bytes per key = ~1Gb to store active data, an extra 1Gb to store replica dataAdding in some headroom: Give 3GB RAM to Couchbase to start and grow with 14

Couchbase Server 2.0 in production: Sizing Sizing Question: How many nodes do I need? Considerations: Disk: • Sustained write rate • Index generation (space and IO) • Append-only B-Tree 15

Couchbase Server 2.0 in production: Sizing Sizing Question: How many nodes do I need? Considerations: Network: • Client traffic • Replication • Rebalancing 16

Couchbase Server 2.0 in production: Sizing Sizing Question: How many nodes do I need? Considerations: Data Safety1 node = single point of failure (bad)2 nodes = 1 replica copy (better)3+ nodes = 1 replica copy AND data/load distribution 17

Couchbase Server 2.0 in production: Sizing Sizing Question: How many nodes do I need? Considerations: RAM Disk Network Data Safety 18

COUCHBASE SERVER 2.0 IN PRODUCTION: DEV/OPS LIFECYCLE Monitor Grow Maintain Upgrade Backup/Restore Failures 19

Couchbase Server 2.0 in production: MonitoringIMMENSE amount of information available-Real-time traffic graphs-REST API accessible-Per bucket, per node and aggregate statistics-Application and inter-node traffic-RAM <-> Disk-Inter-system timing 20

Couchbase Server 2.0 in production: Growth• Going from 1 hundred users to 2 million users… – RAM usage is growing: • Ejecting data to and fetching data from disk • Resident item ratios decreasing – might impact failover – Disk write queue grows higher than usual• Need to add a few more nodes...• Now we have more RAM and more disk throughput without any downtime 22

Couchbase Server 2.0 in production: General Maintenance• Persistence is CouchDB: – Append-only B-tree – Reliability and data integrity – Constantly growing on-disk files• Compaction is the answer: – Automatic – “Fragmentation” data – Scheduled compaction – Per-vbucket database (saves disk space and time) 23

Couchbase Server 2.0 in production: General Maintenance• Backup/Restore: – Backup is as simple as a file-level copy (thanks CouchDB!) – Server will automatically “warmup” from disk files upon reboot• Upgrade: – Add nodes of new version, rebalance… – Remove nodes of old version, rebalance… – Done! – No disruption 24

Couchbase Server 2.0 in production: Failures • Failures happen: – Hardware – Network – Bugs • Failover to replica data for immediate access • Remove and rebalance “malfunctioning” node 25 (Demo)

COUCHBASE SERVER 2.0 IN PRODUCTION: DEV/OPS LIFECYCLE Client setup Initial Setup Test DeployView Development Sizing Monitor Grow Maintain Upgrade Backup/Restore Failures 26

THANK YOU! Q&APerry Krug - perry@couchbase.com 27

CouchConf-Berlin-Couchbase-2.0-in-production

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