Re: hot scsi disk resize

alexey
2003-03-04T09:42:18Z

>>>>> Fabien Salvi (FS) writes:

FS> Well, I also think it's a very important and needed feature for
FS> HA systems. I'm very interested in such things...

FS> But, I thought resize_reiserfs only resize *unmounted* filesystem
FS> : http://www.reiserfs.org/resize_reiserfs.html

citate from this URL: "The resize_reiserfs program allows to grow a
reiserfs on-line if there is a free space on block device."

FS> Will it work under IO load ?

I tested it several times under different load (read-only, write-only,
read-write, single-thread and multi-thread tests). I think reiserfs
team may give comments.

FS> Reiserfs has a way to do it dynamically while using it, with
FS> mount option : http://www.reiserfs.org/mount-options.html

FS> I've tested this without a lot of success (I encounter a lot of
FS> problems).

what kind of problem have you seen? what versions of kernel/reiserfs/tools?

FS> I'm afraid that even if scsi subsystem support the resize option,
FS> FileSystems won't support it correctly... Maybe with LVM ?

FS> Did someone test it ?

>From filesystem point of view, LVM and resizable SCSI HDD are the same
think - just block device which may grow.

I think this patch is just one more step in the right direction.