From: <C.Hotan_at_email.protected>
Date: Wed, 2 Sep 2009 10:24:30 +0800

Hi guys,

Remember, VLBI starts tomorrow and it'd be good if all the disks used could be reformatted to xfs prior to the run (not actually mandatory as we're not doing any 512mbps expts, but still, better to change them as soon as possible). So if you haven't already reformatted your disks, please follow Jamie's instructions below, and we'll need to get our scripts on the vsi machines updated before the next run. You can probably do each set immediately prior to each experiment if need be - just remember to do so!! :)

Don't reformat any v271c disks yet, they're still under embargo.

cheers,

Claire

-----Original Message-----
From: Jamie Stevens [mailto:Jamie.Stevens_at_csiro.<!--nospam-->au]
Sent: Fri 8/28/2009 7:12 AM
To: Phillips, Chris (ATNF, Marsfield); Claire Hotan; Brett.Reid_at_utas.<!--nospam-->edu.au; Jamie.McCallum_at_utas.<!--nospam-->edu.au; Amy, Shaun (ATNF, Marsfield)
Subject: XFS filesystem
Hi all,

Tuning the XFS filesystem is not as simple as just a format command, but
it is still easy.

To format a disk with XFS, I used the command (an example anyway):
mkfs.xfs -f -l size=64m -L "ATNF V006B" /dev/sdc1

Then to further increase performance, I mounted the disk with:
mount -o noatime,nodiratime,logbufs=8 /dev/sdc1 /data/xraid0

Of course, once the disk is formatted, you can just change fstab to
remember these options:
/dev/sdc1 /data/xraid0 xfs noatime,nodiratime,logbufs=8 0 0

Jamie and Brett, you should alter mount_xraids_new.pl on hovsi and cdvsi
to mount XFS disks with the new options.

cheers
Jamie
Received on 2009-09-02 12:24:57