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NAME

mkfs.lustre − format a disk for a Lustre service

SYNOPSIS

mkfs.lustre{--ost|--mdt|--mgs} [options] device
<target_type> is one of

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)