SYNOPSIS

tunefs.lustre [options] device

DESCRIPTION

tunefs.lustre is used to modify the configuration information on a Lustre target disk. This includes upgrading old (pre-Lustre 1.6) disks. This does not reformat the disk or erase the target information, but modifying the configuration information can result in an unusable filesystem. You have been warned.
Changes made here will affect a filesystem only when the target is next mounted.

OPTIONS

--comment=comment

Set user comment about this disk, ignored by Lustre.

--dryrun

Only print what would be done; does not affect the disk

--erase-params

Remove all previous parameter info

--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. Default is 'lustre'

--index=index

Force a particular OST or MDT index

--mountfsoptions=opts

Set the mount options that will be used when mounting the backing fs. WARNING: unlike earlier versions of tunefs.lustre, this version completely replaces the existing 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.

--mgs

Add a configuration management service to this target

--mgsnode=nid,...

Set the NID(s) of the MGS node, required for all targets other than the MGS.

--nomgs

Remove a configuration management service to this target

--quiet

Print less information.

--verbose

Print more information.

--writeconf

Erase all config logs for the filesystem that this MDT is part of, and regenerate them. This is very dangerous. All clients and servers should be stopped. All targets must then be restarted to regenerate the logs. No clients should be started until all targets have restarted. In general this should be executed on the MDT only, not the OSTs.

EXAMPLES

tunefs.lustre --erase-param --mgsnode=<new_nid> --writeconf /dev/sda

Change the MGS NID address. (This should be done on every target disk, since they should all be contacting the same MGS.)

tunefs.lustre --param=failover.node=192.168.0.13@tcp0 /dev/sda

Add a failover NID location for this target

tunefs.lustre --mgs --mdt --fsname=testfs /dev/sda

Upgrade an old 1.4.X Lustre MDT to 1.6. The new filesystem name is "testfs".

tunefs.lustre --writeconf --mgs --mdt --fsname=testfs /dev/sda1

Upgrade an old 1.4.X Lustre MDT to 1.6, and start with brand-new 1.6 configuration logs. All old servers and clients must be stopped.

AVAILABILITY

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