[Beowulf] Looking for block size settings (from stat) on parallel filesystems

Joshua Baker-LePain jlb17 at duke.edu
Thu Jun 17 17:35:47 EDT 2010


On Thu, 17 Jun 2010 at 2:59pm, Craig Tierney wrote

> I am looking for a little help to find out what block sizes (as shown
> by stat) by Linux based parallel filesystems.
>
> You can find this by running stat on a file.  For example on Lustre:
>
> # stat /lfs0/bigfile
>  File: `/lfs0//bigfile'
>  Size: 1073741824	Blocks: 2097160    IO Block: 2097152 regular file
> Device: 59924a4a8h/1502839976d	Inode: 45361266    Links: 1
> Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
> Access: 2010-06-17 20:24:32.000000000 +0000
> Modify: 2010-06-17 20:16:49.000000000 +0000
> Change: 2010-06-17 20:16:49.000000000 +0000
>
> If anyone can run this test and provide me with the filesystem
> and result (as well as the OS used), it would be a big help.  I am
> specifically looking for GPFS results, but other products (Panasas,
> GlusterFS, NetApp GX) would be helpful.

GlusterFS 3.0.4 on CentOS-5:
stat pdball.pir
   File: `pdball.pir'
   Size: 155471981       Blocks: 303984     IO Block: 4096   regular file
Device: 21h/33d Inode: 205792080   Links: 1
Access: (0644/-rw-r--r--)  Uid: (11805/database)   Gid: (11805/database)
Access: 2010-06-10 16:55:43.000000000 -0700
Modify: 2010-06-10 06:03:53.000000000 -0700
Change: 2010-06-10 23:36:14.000000000 -0700

-- 
Joshua Baker-LePain
QB3 Shared Cluster Sysadmin
UCSF
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