[gpfsug-discuss] Using HAWC (write cache)

[Oesterlin, Robert]

Not directly related to HWAC, but I found a bug in 4.1.1 that results in LROC NSDs not being properly formatted (they don’t work) - Reference APAR IV76242 .

Still waiting for a fix.

Bob Oesterlin
Sr Storage Engineer, Nuance Communications
507-269-0413


From: <gpfsug-discuss-bounces at gpfsug.org<mailto:gpfsug-discuss-bounces at gpfsug.org>> on behalf of "Simon Thompson (Research Computing - IT Services)"
Reply-To: gpfsug main discussion list
Date: Wednesday, August 26, 2015 at 6:26 AM
To: gpfsug main discussion list
Subject: [gpfsug-discuss] Using HAWC (write cache)

Hi,

I was wondering if anyone knows how to configure HAWC which was added in
the 4.1.1 release (this is the hardened write cache)
(http://www-01.ibm.com/support/knowledgecenter/#!/STXKQY/411/com.ibm.spectr
um.scale.v4r11.adv.doc/bl1adv_hawc_using.htm)

In particular I'm interested in running it on my client systems which have
SSDs fitted for LROC, I was planning to use a small amount of the LROC SSD
for HAWC on our hypervisors as it buffers small IO writes, which sounds
like what we want for running VMs which are doing small IO updates to the
VM disk images stored on GPFS.


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