I created sandbox sysplex within one CPC (shared CPs for both MVS and CF
LPARs, IC channels).
I observed significant performance improvement when changed GRS from
ring to star mode. I didn't notice such improvement, when changed XCF
transport from CTC (ESCON) to CF structures.
From the other han
>Is the difference because of star mode advantage or just I have
something something to tune when using ring mode ?
...
Ring is affected by the number of systems, since the token has to be passed
along to all systems.
Tuning: reduce the number of systems in the SYSPLEX.
Or, go to STAR.
-teD
In
Ted MacNEIL wrote:
Is the difference because of star mode advantage or just I have
something something to tune when using ring mode ?
...
Ring is affected by the number of systems, since the token has to be passed
along to all systems.
Tuning: reduce the number of systems in the SYSPLEX.
Or,
My story is improbable but true. We have four full function parallel
sysplexes in our enterprise. Of these four, three were converted to star
mode some time ago. The fourth had at most two members, one of which was
very lightly used. So lightly used, in fact, that we stopped running it
altogether;
How about some-one going the otherway - more improbable ???.
Multi-site STAR about to be broken down to a (single-CEC) ring of
monoplexes.
True ...
I did some numbers on the environment - CATALOG is a *BIG* contributor to
GRS traffic.
Historically, this customer has some catalogs on "mixed" volum
Radoslaw,
For small XCF signalling message sizes, CTC will give performance very
close and sometimes even better than a CF structure. This behavior is sort
of documented in a WSC Flash.
Gil.
On 11/4/05, R.S. <[EMAIL PROTECTED]> wrote:
>
> I created sandbox sysplex within one CPC (shared CPs for
Gil Peleg wrote:
Radoslaw,
For small XCF signalling message sizes, CTC will give performance very
close and sometimes even better than a CF structure. This behavior is sort
of documented in a WSC Flash.
Gil.
For XCF signaling, CTCs can provide better performance because, unlike a
signaling
Heh. Read this as ". . . the change to ring mode *installs* dread." Thought I
had been present at the birth of a new catchphrase.
Jon
Things can be done in preparation, but the change to ring mode instills
dread.
--
For I
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