MongoDB: The Way and its Power

MongoDB The Way 道 & its Power 德 Saturday, April 10, 2010

kyle banker @hwaet kyle@10gen.com Saturday, April 10, 2010

Why build MongoDB? Saturday, April 10, 2010

Saturday, April 10, 2010

Mean & Extremes Key-‐Value MongoDB Relational Saturday, April 10, 2010

10 Ideas Saturday, April 10, 2010

1 The Real MongoDB Saturday, April 10, 2010

try.mongodb.org Saturday, April 10, 2010

documents collections dynamic queries secondary indexes explain Saturday, April 10, 2010

Demo Saturday, April 10, 2010

Ruby driver Saturday, April 10, 2010

a pageview document Saturday, April 10, 2010

_id is the primary key Saturday, April 10, 2010

what’s in an oid? Saturday, April 10, 2010

what’s in an oid? 4b6857a0 timestamp Saturday, April 10, 2010

what’s in an oid? 4b6857a0 7613c3 timestamp machine id Saturday, April 10, 2010

what’s in an oid? 4b6857a0 7613c3 6709 timestamp machine id process id Saturday, April 10, 2010

what’s in an oid? 4b6857a0 7613c3 6709 4426b2 timestamp machine id process id counter Saturday, April 10, 2010

bsonspec.org Saturday, April 10, 2010

When we call #save: Saturday, April 10, 2010

When we call #save: 1. Add an _id Saturday, April 10, 2010

When we call #save: 1. Add an _id 2. Serialize to BSON Saturday, April 10, 2010

When we call #save: 1. Add an _id 2. Serialize to BSON 3. socket.send() Saturday, April 10, 2010

2 Object Ids Saturday, April 10, 2010

all about object ids MongoDB standard Timestamp 12-byte BSON type (string is 16) If you still use a string, careful: Saturday, April 10, 2010

3 Use rich documents Saturday, April 10, 2010

Simulating a ﬂexible schema Saturday, April 10, 2010

Simulating a ﬂexible schema What’s the join like? Saturday, April 10, 2010

Simulating a ﬂexible schema What’s the join like? Can we reason about it? Saturday, April 10, 2010

{:sku => ‘637636’, :name => ‘Linen tailored pant’, :about => [{:title => ‘fabric & care’, :content => [‘Dry clean’, ‘Imported’]}, {:title => ‘overview’, :content => [‘Tailored ﬁt’, ‘Yarn dyed’]} ] }* Saturday, April 10, 2010

wordnik.com Saturday, April 10, 2010

migrated 1.2 TB Saturday, April 10, 2010

migrated 1.2 TB queries take 1/4 the time Saturday, April 10, 2010

Text Text Saturday, April 10, 2010

dynamic queries Saturday, April 10, 2010

query operators $ne $in $nin $mod $all $size $exists Saturday, April 10, 2010

4 Array keys Saturday, April 10, 2010

simplify tiny relations Saturday, April 10, 2010

many-to-many Saturday, April 10, 2010

5 Use atomic operators Saturday, April 10, 2010

votes Saturday, April 10, 2010

inventory find_and_modify Saturday, April 10, 2010

update operators $inc $set $push $pushAll $pop $pull $pullAll Saturday, April 10, 2010

6 Map-reduce is for aggregation. Results in a new collection. Saturday, April 10, 2010

map Saturday, April 10, 2010

reduce Saturday, April 10, 2010

7 Indexes are indexes Saturday, April 10, 2010

be smart about indexes Saturday, April 10, 2010

be smart about indexes similar to indexes in MySQL Saturday, April 10, 2010

be smart about indexes similar to indexes in MySQL building indexes can take time Saturday, April 10, 2010

be smart about indexes similar to indexes in MySQL building indexes can take time build compound indexes Saturday, April 10, 2010

8 Performance notes. Saturday, April 10, 2010

notes: Saturday, April 10, 2010

notes: Ruby driver does a lot of work Saturday, April 10, 2010

notes: Ruby driver does a lot of work Run multiple Ruby processes Saturday, April 10, 2010

notes: Ruby driver does a lot of work Run multiple Ruby processes Embedded documents Saturday, April 10, 2010

notes: Ruby driver does a lot of work Run multiple Ruby processes Embedded documents Queries should use indexes Saturday, April 10, 2010

notes: Ruby driver does a lot of work Run multiple Ruby processes Embedded documents Queries should use indexes Keep indexes in RAM Saturday, April 10, 2010

notes: Ruby driver does a lot of work Run multiple Ruby processes Embedded documents Queries should use indexes Keep indexes in RAM Keep working set in RAM Saturday, April 10, 2010

9 Auto-shard, to keep it in RAM. Saturday, April 10, 2010

masterless key-value dynamo order-preserving BigTable PNUTS Saturday, April 10, 2010

client Saturday, April 10, 2010

mongos client Saturday, April 10, 2010

Shards m m m m m m m m m mongos client Saturday, April 10, 2010

Shards m m m Conﬁg m m m m m m Servers mongod mongod mongod mongos client Saturday, April 10, 2010

Shards m m m ... Conﬁg m m m m m m Servers mongod mongod mongod mongos ... mongos client Saturday, April 10, 2010

10 Production Saturday, April 10, 2010

agile development Saturday, April 10, 2010

agile development simplicity / flexibility Saturday, April 10, 2010

agile development simplicity / flexibility analytics / logging Saturday, April 10, 2010

agile development simplicity / flexibility analytics / logging speed / scalability Saturday, April 10, 2010

docs and downloads mongodb.org mailing list: mongodb-user irc: mongodb (freenode) Saturday, April 10, 2010

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MongoDB: The Way and its Power

by Kyle Banker

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