MongoDB

Checkout source

dpavlin@t61p:/rest/cvs$ git clone git://github.com/mongodb/mongo.git
Initialized empty Git repository in /rest/cvs/mongo/.git/
remote: Counting objects: 32011, done.
remote: Compressing objects: 100% (9340/9340), done.
remote: Total 32011 (delta 22724), reused 31556 (delta 22412)
Receiving objects: 100% (32011/32011), 20.57 MiB | 1.12 MiB/s, done.
Resolving deltas: 100% (22724/22724), done.

Install build dependencies

dpavlin@t61p:/rest/cvs/mongo$ sudo apt-get install \
 libboost-dev libboost-thread-dev libboost-filesystem-dev libboost-program-options-dev libboost-date-time-dev \
 libpcre3-dev xulrunner-dev

Build Debian package

debian/control file needs modification for unstable: http://svn.rot13.org/index.cgi/pxelator/view/mongodb/mongo-debian-control-xulrunner.diff

dpavlin@t61p:/rest/cvs$ cd mongo/
dpavlin@t61p:/rest/cvs/mongo$ time dpkg-buildpackage -rfakeroot -b

...

real    6m16.744s
user    5m41.701s
sys     0m19.393s

Perl driver

dpavlin@t61p:/rest/cvs$ git clone git://github.com/mongodb/mongo-perl-driver.git
Initialized empty Git repository in /rest/cvs/mongo-perl-driver/.git/
remote: Counting objects: 1782, done.
remote: Compressing objects: 100% (1673/1673), done.
remote: Total 1782 (delta 1122), reused 0 (delta 0)
Receiving objects: 100% (1782/1782), 1.45 MiB | 747 KiB/s, done.
Resolving deltas: 100% (1122/1122), done.

sudo apt-get install libany-moose-perl libdata-types-perl

dpavlin@t61p:/rest/cvs$ cd mongo-perl-driver/

perl Makefile.PL
make test
sudo dh-make-perl

Binaries

• http://debian.rot13.org/

Queries

PXElator audit examples

> use pexlator
> db.audit.group({
 key: { daemon:true }
,initial: { count: 0 } 
,reduce: function(o,p) { p.count++ }
});

We are really interested only in daemons which aren't null:

> db.audit.ensureIndex( { daemon: true } )
> db.audit.group({
 key: { daemon:true }
,cond: { daemon: { $exists: true } }
,initial: { count: 0 }
,reduce: function(o,p) { p.count++ }
});

Profile

> db.setProfilingLevel(2);
{ "was" : 2, "ok" : 1 }
> db.system.profile.find()

Comparison with CouchDB

Migrate from CouchDB to MongoDB using http://svn.rot13.org/index.cgi/pxelator/view/bin/couchdb2mongodb.pl

Disk usage

root@opr:~# du -hc /var/lib/couchdb/0.9.0/.pxelator* /var/lib/couchdb/0.9.0/pxelator.couch
655M    /var/lib/couchdb/0.9.0/.pxelator_design
23M     /var/lib/couchdb/0.9.0/.pxelator_temp
7.8G    /var/lib/couchdb/0.9.0/pxelator.couch
8.4G    total

root@opr:~# du -hc /var/lib/mongodb/pxelator.*
65M     /var/lib/mongodb/pxelator.0
129M    /var/lib/mongodb/pxelator.1
257M    /var/lib/mongodb/pxelator.2
513M    /var/lib/mongodb/pxelator.3
513M    /var/lib/mongodb/pxelator.4
513M    /var/lib/mongodb/pxelator.5
17M     /var/lib/mongodb/pxelator.ns
2.0G    total