Thinly provisioned (compressed) metadata volumes is unsupported according to IBM. See the GPFS FAQ here, question 4.12:
"Placing GPFS metadata on an NSD backed by a thinly provisioned volume is dangerous and unsupported." http://www.ibm.com/support/knowledgecenter/en/STXKQY/gpfsclustersfaq.html Bob Oesterlin Sr Storage Engineer, Nuance HPC Grid 507-269-0413 From: <[email protected]> on behalf of Brian Marshall <[email protected]> Reply-To: gpfsug main discussion list <[email protected]> Date: Saturday, July 16, 2016 at 9:56 PM To: "[email protected]" <[email protected]> Subject: [EXTERNAL] [gpfsug-discuss] SSD LUN setup I have read about other products doing RAID1 with deduplication and compression to take less than the 50% capacity hit.
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