An Evening with MongoDB - Toronto 2012: Welcome and Keynote

Jenna deBoisblanc
Welcome to MongoDB Toronto and a keynote about what is happening with 10gen, the company behind MongoDB and what is to come.

Transcript

1. An evening in Toronto with MongoDB 2.2 Jenna deBoisblanc Support Engineer, 10gen jenna@10gen.com @jdeboisblanc
2. MongoDB Releases 2.2 Aug ‘12 2.0 Sept ‘11 1.8 March ‘11 2.2-rc0: July 19th 2.2-rc1: targeted July 31st 2.2 – out shortly after
3. Concurrency)improvements Aggregation)framework Tag)aware)sharding Read)Preferences TTL)Collections Shell)enhancements More… • • • • • • • New features in 2.2
4. DB#Level#Locking Global#lock#for#journaling,#fsync#etc.#only Easy#transition#to#collection;level#locks Replication#can#happen#in#parallel#to#write#(client#db#vs. local) Yielding#on#page#faults Started#with#2.0 Yielding#for#updates • – – – • – – Concurrency Improvements
5. Concurrency Stats db.serverStatus(-)- shows-db-level-locks page-fault-details • – – > db.serverStatus().recordStats { "accessesNotInMemory" : 1, "pageFaultExceptionsThrown" : 1, "local" : { "accessesNotInMemory" : 0, "pageFaultExceptionsThrown" : 0 }, "test" : { .... } “foo” : { ... } }
6. Replaces(common(uses(of(map/reduce Implemented(in(C++ Query(optimizer(can(use(indexes Chained(operators $project(–(specified(fields,(compute(values(etc. $unwind(–(stream(arrays $group(–(aggregate(on(key $match $sort • • • • – – – – – Aggregation framework
7. {"_id:"1,"tags:"[“Jenna”,"“pizza”]"} {"_id:"2,"tags:"[“Jenna”,"“sushi”,"“pizza”]"} >db.collection.aggregate( """""{$unwind:"“$tags”}, """""{$group:"{_id:"“$tags”,"total:"{$sum:1}"}"}") "result"":"[ """"""""""""""""{"_id"":""sushi",""total"":"1}, """"""""""""""""{"_id"":""pizza",""total"":"2}, """"""""""""""""{"_id"":""Jenna",""total"":"2} """"""""] Aggregation Framework – example
8. Use$cases force$writes$to$local$data$center distribute$data$based$on$usage • – – Tag aware sharding
9. Modes Drivers*set*on*a*per/connection,*per/collection,*or per/operation*basis Primary*(default)* Primary_Preferred Secondary Secondary_Preferred Nearest Replica*set*tags Read*support*for*replica*set*tags • – • • • • • • – Read Preferences
10. “Time%To%Live” Use%field%in%document%to%specify%expiry Constraints Indexed%field%must%be%a%BSON%date%type Cannot%be%used%on%capped%collection • • • – – TTL Collections {_id:%1,%name:%“Jenna”,%status:%BSONDate} >%db.log.ensureIndex({“status”:%1},%{expireAfterSeconds:%3600})
11. Verbose'mode >'set$verbose$true >'db.foo.update('{'},'{$set:'{field:'10}'}') Updated'2'existing'record(s)'in'2ms Enhanced'editing'features multiDline'support • • – Shell enhancements
12. Replication rs.syncFrom(2“[hostname]2:2[port]”2)2 specify2who2to2sync2from Tools mongooplog2–2tool2for2replaying2oplog Authentication2support2and2concurrency2statistics2in mongotop2and2mongostat • – • – – More…
13. Even More! Query&optimizer Many&improvements&not&directly&visible&to&user Better&support&for&$in&+&sort&+&limit Map/reduce Choose&initial&split&points&for&sharded&output • – – • –
14. What’s next?
15. Operational+enhancements External+authentication+integration Fragmentation+reduction New+features Full9text+search Performance+improvements More+granular+locks Improved+aggregation+framework Index+improvements • – – • – • – – – Post 2.2
16. We’re Hiring ! jenna@10gen.com mongoDB.org