Hi Stefan,
I assume with diskpool you mean primary pools devicetype disk.
Create a filepool on the internal disks and measure performance against it.
If this is as expected, the internal RAID-controller honors the
O_SYNC-writes TSM uses for diskpools and in this case the cache of the
Thanks Michael, so the use of the filepool storagepool type does not set
the O_SYNC flag (and therefor uses the cache on the raid controller) but a
normal diskpool does (and therefor doesn't use the cache)?
On Mon, Feb 11, 2013 at 11:45 AM, Michael Prix m...@rs6000.darktech.orgwrote:
Hi
Thanks Michael, so the use of the filepool storagepool type does not set
the O_SYNC flag (and therefor uses the cache on the raid controller) but
a
normal diskpool does (and therefor doesn't use the cache)?
It's also possible that part of what you are seeing is the Raid5 write
penalty.
The
Stefan,
It may be that all (or an unintended mixed subset(i.e. 1 log, 2 DB and
3 STGPOOL disks) of the disks are on a single I/O channel resulting in a
bottleneck on the data path. This would be reflected by high IO (combined
DB,LOG and STGPOOL activity) during a backup to disk while
] On Behalf Of Stefan
Folkerts
Sent: Sunday, February 10, 2013 9:56 AM
To: ADSM-L@VM.MARIST.EDU
Subject: [ADSM-L] Strange TSM diskpool performance issue
Hi all,
I am running into a strange performance issue at a small TSM site.
They have an new intel based TSM server running Windows 2008 R2 running TSM
5.5
Hi Stefan,
that's what IBM told us.
--
Mit freundlichen Grüßen
Michael Prix
On 02/11/2013 01:46 PM, Stefan Folkerts wrote:
Thanks Michael, so the use of the filepool storagepool type does not set
the O_SYNC flag (and therefor uses the cache on the raid controller) but a
normal diskpool does
Thank's all for the reply's, it's not a log/db/diskpool contrain issue
because I was making a backup of a single 150GB SQL database, that should
not result in many iop's to the log/db.
I am going to try the filepool thing with some private volumes that I can
migrate during the housekeeping to see
Hi all,
I am running into a strange performance issue at a small TSM site.
They have an new intel based TSM server running Windows 2008 R2 running TSM
5.5 (don't ask) with enough CPU and memory to run the server 4 times over.
It has 2 disks in raid 1 for the TSM log, 4 disks in raid 10 for the
Hi Stefan,
if it is HP server check to you have cache battery on RAID (if any) I
had simmilar issue, when I do backup form disk to LTO it was ~80-90
MB/s, but when nodes baked up to this disk stg it was ~8-10 MB/s even
I have etherchannel 2x1Gbps ...
Regards
Chavdar
On Sun, Feb 10, 2013 at 4:55
