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

Kilian CAVALOTTI kilian.cavalotti.work at gmail.com
Fri Jun 18 01:08:36 PDT 2010


On Thu, Jun 17, 2010 at 10:59 PM, Craig Tierney <Craig.Tierney at noaa.gov> wrote:
> 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.

GPFS 3.3 on RHEL5.5:

# stat /gpfs/bigfile
  File: `/gpfs/bigfile'
  Size: 10737418240     Blocks: 20971520   IO Block: 1048576 regular file
Device: 13h/19d Inode: 127073      Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2010-06-18 10:04:10.555613000 +0200
Modify: 2010-06-18 10:04:58.764714000 +0200
Change: 2010-06-18 10:04:58.764714000 +0200

But block size is really something you can choose when creating the
filesystem (mmcrfs -B).


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