NAME
mkfs.lustre - format a disk for a Lustre service
SYNOPSIS
mkfs.lustre{--ost|--mdt|--mgs} [options] device
<target_type> is one of
--ost object storage target
--mdt metadata storage target
--mgs configuration management service - one per site. This service
can be combined with one --mdt service by specifying both types
DESCRIPTION
mkfs.lustre is used to format a disk device for use as part of a Lustre
filesystem. After formatting, a disk can be mounted to start the Lustre
service defined by this command.
OPTIONS
--backfstype=fstype
Force a particular format for the backing fs (ext3, ldiskfs)
--comment=comment
Set user comment about this disk, ignored by Lustre.
--device-size=KB
Set device size for loop devices
--dryrun
Only print what would be done; does not affect the disk
--failnode=nid,...
Set the NID(s) of a failover partner. This option can be
repeated as desired.
--fsname=filesystem_name
The Lustre filesystem this service will be part of. The maximum
filesystem_name length is 8 characters. Default is ’lustre’
--index=index
Force a particular OST or MDT index
--mkfsoptions=opts
Format options for the backing fs. For example, ext3 options
could be set here.
--mountfsoptions=opts
Set the mount options that will be used when mounting the
backing fs. WARNING: unlike earlier versions of mkfs.lustre,
this version completely replaces the default mount options with
those specified on the command line, issuing a warning on stderr
if any of the default mount options are omitted. The defaults
for ldiskfs are OST: errors=remount-ro,mballoc,extents; MGS/MDT:
errors=remount-ro,iopen_nopriv,user_xattr. DO NOT alter the
default mount options unless you know what you are doing.
--mgsnode=nid,...
Set the NID(s) of the MGS node, required for all targets other
than the MGS.
--param key=value
Set permanent parameter key to value value. This option can be
repeated as desired. Typical options might include:
--param sys.timeout=40
System obd timeout
--param lov.stripesize=2M
Default stripe size
--param lov.stripecount=2
Default stripe count
--param failover.mode=failout
Return errors instead of waiting for recovery
--quiet
Print less information.
--reformat
Reformat an existing Lustre disk
--stripe-count-hint=stripes
Used for optizing MDT inode size
--verbose
Print more information.
EXAMPLES
mkfs.lustre --fsname=testfs --mdt --mgs /dev/sda1
Combined MGS and MDT for filesystem ’testfs’ on node e.g. cfs21
mkfs.lustre --fsname=testfs --ost --mgsnode=cfs21@tcp0 /dev/sdb
OST for filesystem ’testfs’ on any node using the above MGS.
mkfs.lustre --mgs /dev/sda1
Standalone MGS on e.g. node cfs22
mkfs.lustre --fsname=myfs1 --mdt --mgsnode=cfs22@tcp0 /dev/sda2
MDT for filesystem ’myfs1’ on any node, using the above MGS
BUGS
Please report all bugs to Sun Microsystems via
http://bugzilla.lustre.org/
AVAILABILITY
mkfs.lustre is part of the Lustre(7) filesystem package and is
available from Sun Microsystems via
http://downloads.lustre.org/
SEE ALSO
lustre(7), mount.lustre(8), tunefs.lustre(8), lctl(8), lfs(1)