On Mar 1, 2010, at 10:24 PM, Roger Deschner wrote:
then it hits a wall. The maximum seems to be about 10Mbytes/sec on a
point-to-point network consisting of three trunked GigE connections.
I'm interested in how you have the NAS connected to your TSM server.
By point-to-point do you mean direct
Well THAT was dramatic! Thanks, Gary.
With DIRECTIO NO set, the write speed to NFS got a LOT faster. However,
the system also started to page memory very heavily. Watching it with
topas, migration would write to NFS nicely for about 15 seconds, and
then it would stop for 5 seconds while AIX
On 4 mrt 2010, at 05:23, Roger Deschner wrote:
Well THAT was dramatic! Thanks, Gary.
With DIRECTIO NO set, the write speed to NFS got a LOT faster. However,
the system also started to page memory very heavily. Watching it with
topas, migration would write to NFS nicely for about 15 seconds,
Yep, had the same problem with iSCSI volumes. Try turning off
directio with the following undocumented dsmserv.opt option.
directio no
Gary Bowers
Storage Architect
Itrus Technologies
On Mar 1, 2010, at 10:24 PM, Roger Deschner wrote:
We have a devtype=file stgpool that is on NAS disk,
We have a devtype=file stgpool that is on NAS disk, accessed via NFS,
and we're getting very slow performance with TSM reading or writing it.
In a test, the Unix cp command moved data about 5 times faster than TSM
Migration.
I have been adjusting the number of migration processes up and down,
