Kristina Chodorowkristina@mongodb.org

MongoDB: A New Genie in the LAMP (Stack)

a retrospective

SQL invented1974

now2010

SQL invented1974

now2010

SQL invented1974

now2010

1979

SQL invented1974

now2010

1979

SQL invented1974

now2010

1979

1982-1996

SQL invented1974

now2010

1995

1979

1982-1996

SQL invented1974

now2010

1995

19792010

1982-1996

until 2009...

until 2009...

SQL invented1974

now2010

1995

19792010

1982-1996

databases

contain tables

contain rows

server

databases

contain tables

contain rows

schemaserver

databases

contain tables

contain rows

joins

schemaserver

things have changed in the last 15 years

duh

SQL invented1974

now2010

1995

19792010

1982-1996

SQL invented1974

now2010

1995

19792010

1995

1982-1996

SQL invented1974

now2010

1995

19792010

19952738 websites

1994

1982-1996

SQL invented1974

now2010

1995

19792010

19952738 websites

1994

>10,000 websites

1995

1982-1996

SQL invented1974

now2010

1995

19792010

1998

19952738 websites

1994

>10,000 websites

1995

1982-1996

We should get a mainframe, old chap.

Harumph.

never leave me!

downtime becomes important

hardware ok?

hardware ok?

failover to slave

no

hardware ok?

failover to slave

fsck worked?

yes

no

hardware ok?

failover to slave

fsck worked?

yes

no

no

hardware ok?

failover to slave

fsck worked?

transaction log

yes

yes

no

no

hardware ok?

failover to slave

fsck worked?

transaction log

yes

yes

nono

no

hardware ok?

failover to slave

fsck worked?

transaction log yay!

yes

yes

yes

nono

no

hardware ok?

failover to slave

fsck worked?

transaction log yay!

yes

yes

yes

nono

no

SQL invented1974

now2010

1995

19792010

1998

19952738 websites

1994

>10,000 websites

1995

1982-1996

SQL invented1974

now2010

1995

19792010

2004

1998

19952738 websites

1994

>10,000 websites

1995

1982-1996

SQL invented1974

now2010

1995

19792010

2004

1998

1995

BigTable2004

2738 websites1994

>10,000 websites

1995

1982-1996

SQL invented1974

now2010

1995

19792010

MapReduce2005

2004

1998

1995

BigTable2004

2738 websites1994

>10,000 websites

1995

1982-1996

you left me!

eh, whatever.

prod1.example.com

prod2.example.com

prod1.example.com

prod2.example.com

prod1.example.com

prod2.example.com

prod1.example.com

prod2.example.com

prod1.example.com

prod2.example.com

prod1.example.com

prod2.example.com

prod1.example.com ?

prod2.example.com

prod2.example.com

prod1.example.com

prod2.example.com

prod1.example.com

?

prod2.example.com

prod1.example.com

prod2.example.com

prod1.example.com

primary

secondary

passive

secondary

secondary

passive

secondary

My priority is 2 My priority is

1

primary

passive

secondary

secondary

passive

secondary

I'm 3ms behind

I'm 2ms behind

secondary

passive

primary

passive

I'll still take reads.

okay

?

make sure two slaves have

this

all set

EXCEPTION

EXCEPTION

EXCEPTION

SQL invented1974

now2010

1995

19792010

MapReduce2005

2004

1998

1995

BigTable2004

2738 websites1994

>10,000 websites

1995

1982-1996

2007

Application

PHP

Linux

Apache

getting started

www.mongodb.org

$ mysqld

$ mongod

$ mysql

$ mongo

$ mongoMongoDB shell version 1.6.0connecting to: test>

$ mongoMongoDB shell version 1.6.0connecting to: test> db

$ mongoMongoDB shell version 1.6.0connecting to: test> dbtest>

$ mongoMongoDB shell version 1.6.0connecting to: test> dbtest>

NO ADMINISTRATION

$ mongoMongoDB shell version 1.6.0connecting to: test> dbtest> table = db.foo

server

databases

server

databases

contain tables

server

databases

contain tables

server

databases

contain tables

server

collections

databases

contain rows

server

contain tables collections

databases

contain rows

server

contain tables collections

databases

contain rows

server

contain tables collections documents

databases

contain rows

server

contain tables collections documents

schema

databases

contain rows

server

contain tables collections documents

schema

joins

databases

contain collections

contain documents

server

$ mongoMongoDB shell version 1.5.5url: testconnecting to: testtype "help" for help> dbtest> collection = db.foo

$ mongoMongoDB shell version 1.5.5url: testconnecting to: testtype "help" for help> dbtest> collection = db.foo

NO ADMINISTRATION

{ "name" : "kristina", "contact info" : { "twitter" : "@kchodorow", "email" : "kristina@10gen.com" }, "friends" : 400232, "pic" : BinData(...) "member since" : new Date()}

> doc = { "name" : "kristina", "contact info" : { "twitter" : "@kchodorow", "email" : "kristina@10gen.com" }, "friends" : 400232, "pic" : BinData(...) "member since" : new Date()}

> db.foo.insert(doc)

> db.foo.findOne({"name" : "kristina"});

> db.foo.findOne({"name" : "kristina"})

> db.foo.findOne({... "contact.twitter" : "@kchodorow"})

> db.foo.findOne({"name" : "kristina"})

> db.foo.findOne({... "contact.twitter" : "@kchodorow"})

> db.foo.find({... "member since" : {... "$gt" : yesterday,... "$lt" : today... }})

> db.foo.findOne({"name" : "kristina"})

> db.foo.findOne({... "contact.twitter" : "@kchodorow"})

> db.foo.find({... "member since" : {... "$gt" : yesterday,... "$lt" : today... }}).sort({friends : 1}).limit(10).... skip(100)

db.people.update( {name : "kristina"},

db.people.update( {name : "kristina"}, {$set :

db.people.update( {name : "kristina"}, {$set : {"contact.website" : "snailinaturtleneck.com"}});

> db.pageviews.update( {url : "example.com"}, {$inc : {pageviews : 1}}, true)

some features

I suddenly have a deep love for stored

procedures

I suddenly have a deep love for stored

procedures

now wi

th store

d

procedu

res!

> db.system.js.insert({

"_id" : "x",

"value" : 3});

> db.system.js.insert({

"_id" : "y",

"value" : 4});

> db.eval("return x+y")

> db.system.js.insert({_id : "log",

... value : function(msg, level) {

... var date = "[" + new Date() + "] ";

... var lvl = level ? level+" " : "";

... print(date + lvl + msg);

... }})

> db.eval("log('all your base are

belong to us', 'FATAL');");

> db.eval("log('all your base are

belong to us', 'FATAL');");

[Fri May 19 18:34:57] FATAL all your

base are belong to us

capped collections

indexes

geospatial indexes

MapReduce

scaling

(rdbms)

silly putty

U - ZK - OA - E F - J P - T

U - ZK - OA - E F - J P - T

I want Mark through Sarah.

U - ZK - OA - E F - J P - T

U - ZK - OA - E F - J P - T

U - ZK - OA - E F - J P - T

Insert Linus

U - ZK - OA - E F - J P - T

Insert Linus

U - ZK - OA - E F - J P - T

$ mongoMongoDB shell version 1.6.0connecting to: test>

$ mongoMongoDB shell version 1.6.0connecting to: test> db.foo.insert({x:1})

thank you!

@kchodorow

http://www.snailinaturtleneck.com