Hi
Thank you.
Exactly the same as our experience has shown.
The point I don't understand , after activate PDSE cache for non SMS
i.e the directory cache should work, we didn't noticed any performance
change, but after put the
libraries into LLA, the improvement was dramatic .
We have some PDSE's opened very often by a server, we hope some
performance after putting to SMS managed volumes.
On 7/5/2011 7:58 PM, Elmer Latorre wrote:
Hi Miklos,
Adding to Peter Relson's mail.
Member data for Non-SMS PDSEs are not cached.
If The PDSE is not a pogram object then it must be an SMS managed for
member caching to occur and the sequential response in the storage clase
must be set to a very low value.
Elmer Latorre
PDSE Devepment Team
On 7/2/2011 4:40 PM, Peter Relson wrote:
Simple rule: if you want modules cached, the library needs to be managed
by LLA.
If LLA deems the module cache-worthy then it will either do the caching
using VLF or may notify PDSE processing to do it.
If I remember correctly, long ago, long before z/OS 1.11, PDSE processing
used to try to cache almost everything. Then all of that caching was
removed. And then it was put back for cases where LLA felt it worthwhile.
Peter Relson
z/OS Core Technology Design
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