There is a non-technical issue you may need to consider. IBM has set licensing rules about mixing in the same Spectrum Scale cluster both ESS from IBM and 3rd party storage that is licensed under ESA/OEM (Lenovo, DDN, Bull, Pixit et al.).
I am sure Carl Zetie or other IBMers who watch this list can explain the exact restrictions. Daniel _________________________________________________________ Daniel Kidger IBM Technical Sales Specialist Spectrum Scale, Spectrum NAS and IBM Cloud Object Store +44-(0)7818 522 266 [email protected] On 3 Apr 2019, at 19:47, Sanchez, Paul <[email protected]> wrote: >> note though you can't have GNR based vdisks (ESS/DSS-G) in the same storage >> pool. > > At one time there was definitely a warning from IBM in the docs about not > mixing big-endian and little-endian GNR in the same cluster/filesystem. But > at least since Nov 2017, IBM has published videos showing clusters containing > both. (In my opinion, they had to support this because they changed the > endian-ness of the ESS from BE to LE.) > > I don't know about all ancillary components (e.g. GUI) but as for Scale > itself, I can confirm that filesystems can contain NSDs which are provided by > ESS(BE), ESS(LE), GSS, and DSS in all combinations, along with SAN storage > based NSD servers. We typically do rolling upgrades of GNR building blocks > by adding blocks to an existing cluster, emptying and removing the existing > blocks, upgrading those in isolation, then repeating with the next cluster. > As a result, we have had every combination in play at some point in time. > Care just needs to be taken with nodeclass naming and mmchconfig parameters. > (We derive the correct params for each new building block from its final > config after upgrading/testing it in isolation.) > > -Paul > > -----Original Message----- > From: [email protected] > <[email protected]> On Behalf Of Simon Thompson > Sent: Wednesday, April 3, 2019 12:18 PM > To: gpfsug main discussion list <[email protected]> > Subject: Re: [gpfsug-discuss] Adding ESS to existing Scale Cluster > > We have DSS-G (Lenovo equivalent) in the same cluster as other SAN/IB storage > (IBM, DDN). But we don't have them in the same file-system. > > In theory as a different pool it should work, note though you can't have GNR > based vdisks (ESS/DSS-G) in the same storage pool. > > And if you want to move to new block size or v5 variable sunblocks then you > are going to have to have a new filesystem and copy data. So it depends what > your endgame is really. We just did such a process and one of my colleagues > is going to talk about it at the London user group in May. > > Simon > ________________________________________ > From: [email protected] > [[email protected]] on behalf of > [email protected] [[email protected]] > Sent: 03 April 2019 17:12 > To: [email protected] > Subject: [gpfsug-discuss] Adding ESS to existing Scale Cluster > > We are planning to add an ESS GL6 system to our existing Spectrum Scale > cluster. Can the ESS nodes be added to existing scale cluster without > changing existing cluster name? Or do we need to create a new scale cluster > with ESS and import existing filesystems into the new ESS cluster? > > Prasad Surampudi > Sr. Systems Engineer > The ATS Group > > > > > > _______________________________________________ > 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=HlQDuUjgJx4p54QzcXd0_zTwf4Cr2t3NINalNhLTA2E&m=qihHkHSqt2rVgrBVDaeGaUrYw-BMlNQ6AQ1EU7EtYr0&s=EANfMzGKOlziRRZj0X9jkK-7HsqY_MkWwZgA5OXOiCo&e= > _______________________________________________ > 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=HlQDuUjgJx4p54QzcXd0_zTwf4Cr2t3NINalNhLTA2E&m=qihHkHSqt2rVgrBVDaeGaUrYw-BMlNQ6AQ1EU7EtYr0&s=EANfMzGKOlziRRZj0X9jkK-7HsqY_MkWwZgA5OXOiCo&e= > Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU
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