Jonathan, You need to create vdisk sets which will create multiple vdisks, you can then assign vdisk sets to your filesystem. (Assigning multiple vdisks at a time)
Things to watch - free space calculations are more complex as it’s building multiple vdisks under the cover using multiple raid parameters Also it’s worth assuming a 10% reserve or approx - drive per disk shelf for rebuild space Mmvdisk vdisk set ... insert parameters https://www.ibm.com/support/knowledgecenter/mk/SSYSP8_5.3.2/com.ibm.spectrum.scale.raid.v5r02.adm.doc/bl8adm_mmvdisk.htm Sent from my iPhone > On 1 Mar 2021, at 21:45, Jonathan Buzzard <[email protected]> > wrote: > > On 01/03/2021 09:08, Luis Bolinches wrote: >> Hi >> >> There other reasons to have more than 1. It is management of those. When >> you have to add or remove NSDs of a FS having more than 1 makes it >> possible to empty some space and manage those in and out. Manually but >> possible. If you have one big NSD or even 1 per enclosure it might >> difficult or even not possible depending the number of enclosures and FS >> utilization. >> >> Starting some ESS version (not DSS, cant comment on that) that I do not >> recall but in the last 6 months, we have change the default (for those >> that use the default) to 4 NSDs per enclosure for ESS 5000. There is no >> impact on performance either way on ESS, we tested it. But management of >> those on the long run should be easier. > Question how does one create a none default number of vdisks per > enclosure then? > > I tried creating a stanza file and then doing mmcrvdisk but it was not > happy, presumably because of the "new style" recovery group management > > mmcrvdisk: [E] This command is not supported by recovery groups under > management of mmvdisk. > > > > > JAB. > > -- > Jonathan A. Buzzard Tel: +44141-5483420 > HPC System Administrator, ARCHIE-WeSt. > University of Strathclyde, John Anderson Building, Glasgow. G4 0NG > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwICAg&c=jf_iaSHvJObTbx-siA1ZOg&r=STXkGEO2XATS_s2pRCAAh2wXtuUgwVcx1XjUX7ELNdk&m=9HlRHByoByQcM0mY0elL-l4DgA6MzHkAGzE70Rl2p2E&s=eWRfWGpdZB-PZ_InCCjgmdQOCy6rgWj9Oi3TGGA38yY&e= > >
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