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

AVAILABILITY

mkfs.lustre is part of the Lustre(7) filesystem package and is available from Sun Microsystems via
http://downloads.lustre.org/