are the tdp sessions either lan-free or going directly to tape?

as with any performance issue: measure every parameter in the system. Have nmon 
running during the night, logging all metrics... I'm not convinced that the sdd 
driver change is the only contributing factor,,,,

On 10 dec 2009, at 23:16, Fred Johanson wrote:

> 
> My 6 boxes are TSM 5.5.3.0 on AIX  5.3.11.  The change was to upgrade a 
> driver from SDD to SDDPCM 2.2.03, whatever that means.  On each machine I/O 
> went to hell.  On 3 backups went normally, but migration crawled.  On the 
> other 3 migrations went fine but backups were almost non-existent.  The 
> exception on all 6 was that TDP and SQLBacktrack went normally.  We backed 
> out the changes and things are back to normal.
> 
> The unanswered question that management wants to know is why the TDP weren't 
> affected.

-- 
Met vriendelijke groeten,

Remco Post
r.post AT plcs DOT nl
+31 6 248 21 622