Whit Blauvelt wrote:
Hi Deyan,
This may not be a useful suggestion, but why not just partition your storage
so that your bricks remain uniform?
==> Well this is a good suggestion unless you already have non uniform storage
with huge difference in brick sizes. The thing is that I was using one single fs
(XFS) which is over LVM and I was growing it each time I add new hdds. However I
realized that this could bring me a lot of troubles and decided to switch to
glusterfs, which brings the smaller bricks in the game. So basically I dont have
enough space to transfer the huge brick to a smaller bricks and that is why I
got to this situation.
When you get more disk capacity because
you've got 3TB drives instead of 2TB in RAID5, so that you have 15TB rather
than 10TB per system, why not split the storage into 10TB and 5TB
partitions, use the 10TB for a uniform-sized brick to add to an existing
Gluster storage area, and then take your 5TB partitions and set up another
Gluster share using that as your uniform brick size for it?
===> I am trying to build something like cloud storage using Gluster which
basically does not suit to your suggestion. If I wanted to have partitioned
storage I would not have chosen glusterfs. What I was imaging was, just add new
bricks no matter what size it will handle them automatically, which it does not.
If I knew this before I probably would not choose gluster.
Thank you
Regards,
Deyan
Might not fit your requirements at all - depends on what you're storing and
whether it makes sense to separate it into a couple of different areas.
Best,
Whit
On Wed, Aug 17, 2011 at 04:28:42PM +0300, Deyan Chepishev - SuperHosting.BG
wrote:
Hello,
This is really bad news, because I already migrated my data and I
just realized that I am screwed because Gluster just does not care
about the brick sizes.
It is impossible to move to uniform brick sizes.
Currently we use 2TB HDDs, but the disks are growing and soon we
will probably use 3TB hdds or whatever other larges sizes appear on
the market. So if we choose to use raid5 and some level of
redundancy (for example 6hdds in raid5, no matter what their size
is) this sooner or later will lead us to non uniform bricks which is
a problem and it is not correct to expect that we always can or want
to provide uniform size bricks.
With this way of thinking if we currently have 10T from 6x2T in
hdd5, at some point when there is a 10T on a single disk we will
have to use no raid just because gluster can not handle non uniform
bricks.
Regards,
Deyan
_______________________________________________
Gluster-users mailing list
[email protected]
http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
