MongoDB on OpenVZ, Warning. What is the problem?

Question

MongoDB

Os debian, on it is openvz, with CentOS.
I'm trying to run mongo:

Fri Feb 21 05:52:57.250 [initandlisten] MongoDB starting : pid=1104 port=27017 dbpath=/var/lib/mongo 64-bit host=мой хост
Fri Feb 21 05:52:57.250 [initandlisten]
Fri Feb 21 05:52:57.250 [initandlisten] ** WARNING: You are running in OpenVZ. This is known to be broken!!!
Fri Feb 21 05:52:57.250 [initandlisten]
Fri Feb 21 05:52:57.250 [initandlisten] db version v2.4.9
Fri Feb 21 05:52:57.250 [initandlisten] git version: 52fe0d21959e32a5bdbecdc62057db386e4e029c
Fri Feb 21 05:52:57.250 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1$
Fri Feb 21 05:52:57.250 [initandlisten] allocator: tcmalloc
Fri Feb 21 05:52:57.250 [initandlisten] options: { config: "/etc/mongod.conf", dbpath: "/var/lib/mongo", fork: "true", logappend: "true", logpath: "/var/log/mong$
Fri Feb 21 05:52:57.307 [initandlisten] journal dir=/var/lib/mongo/journal
Fri Feb 21 05:52:57.307 [initandlisten] recover : no journal files present, no recovery needed
Fri Feb 21 05:52:57.307 [initandlisten]
Fri Feb 21 05:52:57.307 [initandlisten] ERROR: Insufficient free space for journal files
Fri Feb 21 05:52:57.307 [initandlisten] Please make at least 3379MB available in /var/lib/mongo/journal or use --smallfiles
Fri Feb 21 05:52:57.307 [initandlisten]
Fri Feb 21 05:52:57.307 [initandlisten] exception in initAndListen: 15926 Insufficient free space for journals, terminating
Fri Feb 21 05:52:57.307 dbexit:
Fri Feb 21 05:52:57.307 [initandlisten] shutdown: going to close listening sockets...
Fri Feb 21 05:52:57.307 [initandlisten] shutdown: going to flush diaglog...
Fri Feb 21 05:52:57.307 [initandlisten] shutdown: going to close sockets...
Fri Feb 21 05:52:57.307 [initandlisten] shutdown: waiting for fs preallocator...
Fri Feb 21 05:52:57.308 [initandlisten] shutdown: lock for final commit...
Fri Feb 21 05:52:57.308 [initandlisten] shutdown: final commit...
Fri Feb 21 05:52:57.308 [initandlisten] shutdown: closing all files...
Fri Feb 21 05:52:57.308 [initandlisten] closeAllFiles() finished
Fri Feb 21 05:52:57.308 [initandlisten] journalCleanup...
Fri Feb 21 05:52:57.308 [initandlisten] removeJournalFiles
Fri Feb 21 05:52:57.340 [initandlisten] shutdown: removing fs lock...
Fri Feb 21 05:52:57.340 dbexit: really exiting now

Please tell me what is the problem?