09-06-2017
Clustered filesystem which one to pick
Hi all,
I'm a bit new to advanced filesystem types. I've just only learned that if you wish to share a single fibre channel extent with many servers you need to use a clustered filesystem to prevent data corruption.
looking through a list of clustered file systems I saw gfs2 which I thought might be a good one to use. but is it the best for what I need or want to do?
I have a large 7TB fibre channel extent which is accessible by 14+ servers on the fibre channel network. I'd like each server to be able to use this storage space for the vHDs of their running VMs. I don't want to split up this 7TB into 500GB vdisks so each server can have a slice.
So I understand I need a special filesystem to do this. what would you recommend?
If it is an important detail I'll mention these 14 servers are Openstack Newton Nova/Compute nodes. (Ubuntu 16.04.3LTS)
my guess is I would have to format the drive as GFS2 from one of the 14 servers and then gfs mount it from all 14 servers
please let me know what you think of GFS2
or comment on what I' doing.
I'll gladly supply more info on my setup if you need it!
thx!
Last edited by rbatte1; 09-07-2017 at 04:52 AM..
Reason: Spelling
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LEARN ABOUT DEBIAN
gfs_grow
gfs_grow(8) System Manager's Manual gfs_grow(8)
NAME
gfs_grow - Expand a GFS filesystem
SYNOPSIS
gfs_grow [OPTION]... <DEVICE|MOINTPOINT>...
DESCRIPTION
gfs_grow is used to expand a GFS filesystem after the device upon which the filesystem resides has also been expanded. By running gfs_grow
on a GFS filesystem, you are requesting that any spare space between the current end of the filesystem and the end of the device is filled
with a newly initialized GFS filesystem extension. When this operation is complete, the resource index for the filesystem is updated so
that all nodes in the cluster can use the extra storage space which has been added.
You may only run gfs_grow on a mounted filesystem; expansion of unmounted filesystems is not supported. You only need to run gfs_grow on
one node in the cluster. All the other nodes will see the expansion has occurred and automatically start to use the newly available space.
You must be superuser to execute gfs_grow. The gfs_grow tool tries to prevent you from corrupting your filesystem by checking as many of
the likely problems as it can. When expanding a filesystem, only the last step of updating the resource index affects the currently
mounted filesystem and so failure part way through the expansion process should leave your filesystem in its original unexpanded state.
You can run gfs_grow with the -Tv flags to get a display of the current state of a mounted GFS filesystem. This can be useful to do after
the expansion process to see if the changes have been successful.
gfs_grow will consume all the remaining space in a device and add it to the filesystem. If you want to add journals too, you need to add
the journals first using gfs_jadd.
OPTIONS
-h Prints out a short usage message and exits.
-q Quiet. Turns down the verbosity level.
-T Test. Do all calculations, but do not write any data to the disk and do not expand the filesystem. This is used to discover what the
tool would have done were it run without this flag. You probably want to turn the verbosity level up in order to gain most informa-
tion from this option.
-V Version. Print out version information, then exit.
-v Verbose. Turn up verbosity of messages.
SEE ALSO
mkfs.gfs(8) gfs_jadd(8)
gfs_grow(8)