Re: FC Performance vs SAS

The point is : when using PCIX 1.5 GB Cache RAID adapter and some special
part numbers you need SSD and 16Gb FC to pair with a V5xxx. Maybe with a
V5030 (64GB Cache)

With RPG it's a matter of latency and you need good SAN communication
(forget about VSCSI) and fast disk subsystems with real compute power or
you'll feel disappointed.




El jue., 6 de dic. de 2018 09:42, Christopher Bipes <
chris.bipes@xxxxxxxxxxxxxxx> escribió:

How did you define the connection to the SAN? Do you have just one or
multiple virtual connections?

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-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxx> On Behalf Of Holger
Scherer
Sent: Thursday, December 6, 2018 7:29 AM
To: Midrange-list <midrange-l@xxxxxxxxxxxx>
Subject: FC Performance vs SAS

Hi Friends,
a colleague just called me about an end user having some performance
issues:

- old box: Power6 E4A, 32G RAM, 18 Disks 139GB SAS
- new box: Power7+ E1D, 128G RAM, V5000 with 8GBit FC, 24*300G 15k Disk

the new box is slower when running some old style RPG reporting program,
there is not that much I/O and V5000 box gets about 1000 I/O Sek.
If running serial operations (like save into save file) the box can do
14000 I/O
and up to 550MB/Sek.

As we do not have much customers with a small P7 and SAN - does anyone
of you have experience with these types of config?

-h

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