[Lustre-discuss] Optimal OSS OST drives for boxed deployment

Sat Jan 10 13:48:06 PST 2009

The reason I ask is because I am at the tuning and configuration section of my deployment and that includes raiding the servers properly.  So far this is what it looks like unmounted from a client.  I've had it all mounted from the client connected to an OSS before but that is not ideal.

root at lustreone ~]# cat /proc/fs/lustre/devices
  0 UP mgc MGC192.168.0.19 at tcp 0c8fe823-9b73-df4d-b3d3-73eb8db70038 5
  1 UP ost OSS OSS_uuid 3
  2 UP obdfilter datafs-OST001e datafs-OST001e_UUID 3
  3 UP obdfilter datafs-OST001f datafs-OST001f_UUID 3
  4 UP obdfilter datafs-OST0020 datafs-OST0020_UUID 3
  5 UP obdfilter datafs-OST0021 datafs-OST0021_UUID 3
  6 UP obdfilter datafs-OST0022 datafs-OST0022_UUID 3
[root at lustreone ~]#

Ouch!
[root at lustretwo Desktop]# cat /proc/fs/lustre/devices
  0 UP mgc MGC192.168.0.19 at tcp 19c4feb6-3285-f01f-b528-02dfeaef0b57 5
  1 UP ost OSS OSS_uuid 3
  2 UP obdfilter datafs-OST0023 datafs-OST0023_UUID 5
  3 UP obdfilter datafs-OST0024 datafs-OST0024_UUID 5
  4 UP obdfilter datafs-OST0025 datafs-OST0025_UUID 5
  5 UP obdfilter datafs-OST0026 datafs-OST0026_UUID 5
  6 UP obdfilter datafs-OST0027 datafs-OST0027_UUID 5
[root at lustretwo Desktop]#  

[root at lustrethree Desktop]# cat /proc/fs/lustre/devices
  0 UP mgs MGS MGS 11
  1 UP mgc MGC192.168.0.19 at tcp 3aba1efe-92c2-88dd-c06b-47be63d63f49 5
[root at lustrethree Desktop]#
[root at lustrefour Desktop]# cat /proc/fs/lustre/devices
  0 UP mgc MGC192.168.0.19 at tcp c9c83cf8-2965-4677-5b76-404d738e15bc 5
  1 UP mdt MDS MDS_uuid 3
  2 UP lov datafs-mdtlov datafs-mdtlov_UUID 4
  3 IN osc datafs-OST0000-osc datafs-mdtlov_UUID 5
  4 IN osc datafs-OST0001-osc datafs-mdtlov_UUID 5
  5 IN osc datafs-OST0002-osc datafs-mdtlov_UUID 5
  6 IN osc datafs-OST0003-osc datafs-mdtlov_UUID 5
  7 IN osc datafs-OST0004-osc datafs-mdtlov_UUID 5
  8 IN osc datafs-OST0005-osc datafs-mdtlov_UUID 5
  9 IN osc datafs-OST0006-osc datafs-mdtlov_UUID 5
 10 IN osc datafs-OST0007-osc datafs-mdtlov_UUID 5
 11 IN osc datafs-OST0008-osc datafs-mdtlov_UUID 5
 12 IN osc datafs-OST0009-osc datafs-mdtlov_UUID 5
 13 IN osc datafs-OST000a-osc datafs-mdtlov_UUID 5
 14 IN osc datafs-OST000b-osc datafs-mdtlov_UUID 5
 15 IN osc datafs-OST000c-osc datafs-mdtlov_UUID 5
 16 IN osc datafs-OST000d-osc datafs-mdtlov_UUID 5
 17 IN osc datafs-OST000e-osc datafs-mdtlov_UUID 5
 18 IN osc datafs-OST000f-osc datafs-mdtlov_UUID 5
 19 IN osc datafs-OST0010-osc datafs-mdtlov_UUID 5
 20 IN osc datafs-OST0011-osc datafs-mdtlov_UUID 5
 21 IN osc datafs-OST0012-osc datafs-mdtlov_UUID 5
 22 IN osc datafs-OST0013-osc datafs-mdtlov_UUID 5
 23 UP mds datafs-MDT0000 datafs-MDT0000_UUID 5
 24 UP osc datafs-OST0014-osc datafs-mdtlov_UUID 5
 25 UP osc datafs-OST0015-osc datafs-mdtlov_UUID 5
 26 UP osc datafs-OST0016-osc datafs-mdtlov_UUID 5
 27 UP osc datafs-OST0017-osc datafs-mdtlov_UUID 5
 28 UP osc datafs-OST0018-osc datafs-mdtlov_UUID 5
 29 UP osc datafs-OST0019-osc datafs-mdtlov_UUID 5
 30 UP osc datafs-OST001a-osc datafs-mdtlov_UUID 5
 31 UP osc datafs-OST001b-osc datafs-mdtlov_UUID 5
 32 UP osc datafs-OST001c-osc datafs-mdtlov_UUID 5
 33 UP osc datafs-OST001d-osc datafs-mdtlov_UUID 5
 34 UP osc datafs-OST001e-osc datafs-mdtlov_UUID 5
 35 UP osc datafs-OST001f-osc datafs-mdtlov_UUID 5
 36 UP osc datafs-OST0020-osc datafs-mdtlov_UUID 5
 37 UP osc datafs-OST0021-osc datafs-mdtlov_UUID 5
 38 UP osc datafs-OST0022-osc datafs-mdtlov_UUID 5
 39 UP osc datafs-OST0023-osc datafs-mdtlov_UUID 5
 40 UP osc datafs-OST0024-osc datafs-mdtlov_UUID 5
 41 UP osc datafs-OST0025-osc datafs-mdtlov_UUID 5
 42 UP osc datafs-OST0026-osc datafs-mdtlov_UUID 5
 43 UP osc datafs-OST0027-osc datafs-mdtlov_UUID 5
[root at lustrefour Desktop]#            

--- On Sat, 1/10/09, Arden Wiebe <albert682 at yahoo.com> wrote:

From: Arden Wiebe <albert682 at yahoo.com>
Subject: [Lustre-discuss] Optimal OSS OST drives for boxed deployment
To: lustre-discuss at lists.lustre.org
Date: Saturday, January 10, 2009, 1:40 PM

I have two OSS each have six 1TB drives.  
sda contains the kernel and the operating system.
sdb,sdc,sdd,sde,sdf are the targets and make only a raid 5.

Is it advisable to add another drive to each of these OSS's to facilitate raid 6 for the targets?

sda has only / partion and occupies the entire 1TB drive.

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