Set the filesystem block size to BlockSize (must be a power of
two). The minimum block size is 512. The FS block size cannot exceed
the machine's memory page size. On the most architectures (i386,
x86_64, s390, s390x), the memory page size is 4096 bytes. On other
architectures it may be bigger. The default block size is 4096 bytes.
In general, GFS filesystems should not deviate from the default value.
-D
Enable debugging output.
-h
Print out a help message describing available
options, then exit.
-JMegaBytes
The size of the journals in Megabytes. The default journal size is
128 megabytes. The minimum size is 32 megabytes.
-jNumber
The number of journals for gfs_mkfs to create. You need at least one
journal per machine that will mount the filesystem.
-O
This option prevents gfs_mkfs from asking for confirmation before writing
the filesystem.
-pLockProtoName
LockProtoName is the name of the locking protocol to use. Acceptable
locking protocols are lock_dlm, lock_gulm or if you are using GFS
as a local filesystem (1 node only), you can specify the
lock_nolock protocol.
-q
Be quiet. Don't print anything.
-rMegaBytes
gfs_mkfs will try to make Resource Groups about this big.
The default is 256 MB.
-sBlocks
Journal segment size in filesystem blocks. This value must be at
least two and not large enough to produce a segment size greater than
4MB.
-tLockTableName
The lock table field appropriate to the lock module you're using.
It is clustername:fsname.
Clustername must match that in cluster.conf; only members of this
cluster are permitted to use this file system.
Fsname is a unique file system name used to distinguish this GFS file
system from others created (1 to 16 characters). Lock_nolock doesn't
use this field.
This will make a Global File System on the block device
"/dev/vg0/mygfs". It will belong to "mycluster" and register itself
as wanting locking for "mygfs". It will use DLM for locking and make
two journals.
This will make a Global File System on the block device
"/dev/vg0/mygfs". It will belong to "mycluster" and register itself
as wanting locking for "mygfs". It will use GULM for locking and make
two journals.
