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DESCRIPTION
http://yapc2010.com/yn2010/talk/2578
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Who am I?
what is ?
Application
Perl
Linux
Apache
Application
Perl
Linux
DatabaseApache
Application
Perl
Windows
Apache
Application
Perl
Linux
Apache
Application
Perl
Linux
Apache
Application
Perl
Linux
Apache
Application
Perl
Linux
Apache
The world's mostpopular open source
database
Application
Perl
Linux
Apache
The world's mostadvanced open source
database
databases
contain tables
contain rows
databases
contain tables
contain rows
schema
databases
contain tables
contain rows
joins
schema
databases
contain tables
contain rows
joins
schema
Application
Perl
Linux
Apache
getting started
www.mongodb.org
cpan -i MongoDB
$conn = MongoDB::Connection->new;
$conn = MongoDB::Connection->new;$db = $conn->foo;
$conn = MongoDB::Connection->new;$db = $conn->foo;
NO ADMINISTRATION
$conn = MongoDB::Connection->new;$db = $conn->foo;$table = $db->bar;
$conn = MongoDB::Connection->new;$db = $conn->foo;$table = $db->bar;
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
$conn = MongoDB::Connection->new;$db = $conn->foo;$collection = $db->bar;
$conn = MongoDB::Connection->new;$db = $conn->foo;$collection = $db->bar;
NO ADMINISTRATION
$conn = MongoDB::Connection->new;$db = $conn->foo$collection = $db->bar;
$doc = {"name" => "kristina", "contact info" => { "twitter" => "@kchodorow", "email" => "kristina@10gen.com" }, "friends" => 400232, "pic" => \$file_str, "member since" => DateTime->now};
$conn = MongoDB::Connection->new;$db = $conn->foo$collection = $db->bar;
$doc = {"name" => "kristina", "contact info" => { "twitter" => "@kchodorow", "email" => "kristina@10gen.com" }, "friends" => 400232, "pic" => \$file_str, "member since" => DateTime->now};
$collection->insert($doc);
mongo is type-sensitive and type-rich
•null•boolean•integer•double•string•array•hash
•qr/fobar/i•\$bindata•DateTime•MongoDB::OID•MongoDB::Code•MongoDB::MinKey•MongoDB::MaxKey
$collection->find_one({ "name" => "kristina"});
$collection->find_one({ "name" => "kristina"});
$collection->find_one({ "contact.twitter" => "@kchodorow"});
$collection->find_one({ "name" => "kristina"});
$collection->find_one({ "contact.twitter" => "@kchodorow"});
$collection->find({ "member since" => { '$gt' => $yesterday, '$lt' => $now}});
$collection->find_one({ "name" => "kristina"});
$collection->find_one({ "contact.twitter" => "@kchodorow"});
$collection->find({ "member since" => { '$gt' => $yesterday, '$lt' => $now}})->sort({"friends" => 1});
$collection->find_one({ "name" => "kristina"});
$collection->find_one({ "contact.twitter" => "@kchodorow"});
$collection->find({ "member since" => { '$gt' => $yesterday, '$lt' => $now}})->sort({"friends" => 1})->limit(10);
$collection->find_one({ "name" => "kristina"});
$collection->find_one({ "contact.twitter" => "@kchodorow"});
$collection->find({ "member since" => { '$gt' => $yesterday, '$lt' => $now}})->sort({"friends" => 1})->limit(10) ->skip(100);
$collection->find_one({ "name" => "kristina"});
$collection->find_one({ "contact.twitter" => "@kchodorow"});
$cursor = $collection->find({ "member since" => { '$gt' => $yesterday, '$lt' => $now}})->sort({"friends" => 1})->limit(10) ->skip(100);
while (my $doc = $cursor->next) { # ... }
my @results = $cursor->all;
x < 3
{"x" => {'$lt' => 3}}
$gt$lte$ne$mod
$exists$type...
$collection->update( {"name" => "kristina"},
$collection->update( {"name" => "kristina"}, {'$set' =>
$collection->update( {"name" => "kristina"}, {'$set' => {"contact.website" => "snailinaturtleneck.com"}});
updates are...•atomic•in-place (when possible)•able to create and delete fields•able to create documents
$collection->update( {"url" => "example.com"}, {'$inc' => {"pageviews" => 1}}, {"upsert" => 1});
$set$inc$push$pop$pull...
$set$inc$push$pop$pull...
$set$inc$push$pop$pull...
$set$inc$push$pop$pull...
"$gte"
"<null>"
""
'$gte' or "\$gte"
Or define your own!
":gte""=gte""?gte"
Or define your own!
" gte"
Or define your own!
" gte"" ♕ gte"
Or define your own!
" gte"" ♕ gte""xgte"
features
I suddenly have a deep love for stored procedures
I suddenly have a deep love for stored procedures
now with stored
procedures!
$db->system->js->insert({ "_id" => "x", "value" => 3});
$db->system->js->insert({ "_id" => "y", "value" => 4});
$db->eval("return x+y");
my $log = <<<LOGfunction(msg, level) { var date = "[" + new Date() + "] "; var lvl = level ? level+" " : ""; print(date + lvl + msg);}LOG;
$db->system->js->insert({ "_id" => "log", "value" => $log});
$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
J J J
J J J
J J J
$metadata = { "_id" => " " "date" => DateTime->now "downloads" => 0, "user" => $userId, "filename" => "rickroll.flv"}
J
$grid = $db->get_gridfs;
$grid->put($fh, $metadata);
$grid = $db->get_gridfs;
$grid->put($fh, $metadata);
$file = $grid->find_one({ "filename" => qr/rickroll/i});
$grid = $db->get_gridfs;
$grid->put($fh, $metadata);
$file = $grid->find_one({ "filename" => qr/rickroll/i});
$file->print($fh2);
Benefits:• Automatic backups• Unlimited metadata• Millions of files per directory• Random access• Better disk locality
Geospatial Indexes
$coll->insert({location => (-40, 78)});
$coll->insert({location => (-40, 78)});
$coll->find({location => { '$near' => (-40, 77)}})
$coll->insert({location => (-40, 78)});
$coll->find({location => { '$near' => (-40, 77)}})->limit(10)
what doesn't it have?
transactions
are you practicing safedata storage?
Insert this.
Okay, got it.
Phew, my data's safe.
Write this to disk
All over it!
I know better than he does, I'll just let this sit in a buffer for a while.
? I have no idea what you're talking about.
trust no one!
...trust a bunch of ones. Mostly.
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
okay
?
make sure two slaves have this
all set
EXCEPTION
EXCEPTION
EXCE
PTIO
N
$conn->w(3);
$collection->insert({"x" => 1}, {"safe" => 1});
scaling
sometimes read-only
sometimes read-onlysometimes inconsistent
U - ZK - OA - E F - J P - T
U - ZK - OA - E F - J P - T
U - ZK - OA - E F - J P - T
config
mongod mongod mongod
mongos
mongos
mongod mongod mongod
I want posts from April 2009 - June 2009
mongos
mongod mongod mongod
April and May is on #2. June is on #3.
mongos
mongod mongod mongod
mongos
mongod mongod mongod
mongos
mongod mongod mongod
Add this post for March 26, 2010.
mongos
mongod mongod mongod
#3 hold June 2009-present
config
mongod mongod mongod
mongos
So, what's going on?
config
mongod mongod mongod
mongos
$conn = MongoDB::Connection->new;# ...
try.mongodb.org
www.mongodb.org
thank you!
@kchodorow
http://www.snailinaturtleneck.com
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