>>> They will support servers using ext4 for file storage.  (But not for
client backups yet).

Huh?  What do you mean by "client backups"?  Do you mean as in file device
class?

We did not realize the filesystem type would be such an issue.  We just
built 2-systems using SAN storage and were wondering why one took almost
2x-longer wallclock time to format the storage volumes than the other. The
person who installed the OS realize the "slow" system was ext2 while the
"faster one" is ext4 so he reformatted the "slow" one to be ext4.
Originally I had planned to use the SAN space as file dev class but have
switched to 200GB formatted volumes (for 5TB space).

However, we have noticed the system that was originally ext2, is
generating these strange errors when formatting the SAN space, that we
have not been able to identify nor resolve.  If anyone else has seen these
or can offer some suggestions, it would be greatly appreciated!

Oct 29 10:56:23 moon kernel: qla2xxx 0000:83:00.0: scsi(7:0:0): Abort
command issued -- 1 9e1649 2002.
Oct 29 11:42:57 moon kernel: qla2xxx 0000:83:00.0: scsi(7:0:0): Abort
command issued -- 1 a2cdc8 2002.
Zoltan Forray
TSM Software & Hardware Administrator
Virginia Commonwealth University
UCC/Office of Technology Services
zforray AT vcu DOT edu - 804-828-4807
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From:
"Colwell, William F." <bcolwell AT DRAPER DOT COM>
To:
ADSM-L AT VM.MARIST DOT EDU
Date:
10/28/2010 04:08 PM
Subject:
[ADSM-L] Linux ext4 filesystems - is anyone using them for devt=file
storage?
Sent by:
"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>



Hi,



I am running 2 6.1 servers on rhel 5.5.  I am doing a lot of doing
dedup.  All primary storagepools are

devicetype file.  Current I have 10 16TB ext3 filesystems on raid 6
Sata.  All volumes are

scratch allocations.



I have another 96TB ready to go.  I haven't made the filesystems yet.
So my question is if anyone

is using ext4 yet as the filesystem type for TSM storagepools.



>From my initial reading, I think the extent allocation feature would be
very useful.

See http://en.wikipedia.org/wiki/Ext4



I opened a pmr today to ask if IBM would support servers using ext4, and
they just called back!

They will support servers using ext4 for file storage.  (But not for
client backups yet).



Also, is anyone using ext4 for the database?



Thanks,



Bill Colwell

Draper Lab