RE: New Power8 Disk Perf Issues

"Steinmetz, Paul" <PSteinmetz@xxxxxxxxxx> wrote on Thu, 28 Aug
2014 15:50:28 GMT:

Using option 3, high function backplane, fully loaded CEC
18 - 775 GB SFF-3 SSD for IBM I (ES0P) using Raid--5
12TB usable
8 - 387 GB 1.8'' SSD for IBM I (ES17) using Raid-5 -
2.7 TB usable (Are the 387 the largest 1.8 SSD
available?)

Unfortunately, for now, that is the largest in the 1.8 form
factor.

Now the big question, create 3 to 4 I LPARs, non-VIOS,
(previous thread with Jim and Rob) One of LPARS might be an HA
LPAR. I hosting I
What would the performance be with the backplane controller?
Is there a controller that would offer better performance?
(5913, ESA1, ESA3)??

I would expect for the 26 SSDs in question, it to be better than
24 SSDs on any of the features listed above.

IBM did add to the line up the EJ0J adapter with 12 GB of write
cache and the ability to support up to 96 HDDs, a mix of SSD/HDD
not to exceed 96 devices (I don't recommend this!), or up to 48
SSDs. This adapter is IBM's best for "internal" disk at the
present time with the POWER8 high-function back plance a close
2nd.

Sorry for the delayed reply, been out of the office for a bit.