Can we confirm the requirement for disks per RG? I have 4 RG, but only 6 x 3TB NVMe drives per box.
> On Jul 29, 2019, at 1:34 PM, Luis Bolinches <[email protected]> wrote: > > Hi, from phone so sorry for typos. > > I really think you should look into Spectrum Scale Erasure Code Edition (ECE) > for this. > > Sure you could do a RAID on each node as you mention here but that sounds > like a lot of waste to me on storage capacity. Not to forget you get other > goodies like end to end checksum and rapid rebuilds with ECE, among others. > > Four servers is the minimum requirement for ECE (4+3p) and from top of my > head 12 disk per RG, you are fine with both requirements. > > There is a presentation on ECE on the user group web page from London May > 2019 were we talk about ECE. > > And the ibm page of the product > https://www.ibm.com/support/knowledgecenter/STXKQY_ECE_5.0.3/com.ibm.spectrum.scale.ece.v5r03.doc/b1lece_intro.htm > > <https://www.ibm.com/support/knowledgecenter/STXKQY_ECE_5.0.3/com.ibm.spectrum.scale.ece.v5r03.doc/b1lece_intro.htm> > -- > Cheers > > El 29 jul 2019, a las 19:06, David Johnson <[email protected] > <mailto:[email protected]>> escribió: > >> We are planning a 5.0.x upgrade onto new hardware to make use of the new 5.x >> GPFS features. >> The goal is to use up to four NSD nodes for metadata, each one with 6 NVMe >> drives (to be determined >> whether we use Intel VROC for raid 5 or raid 1, or just straight disks). >> >> So questions — >> Has anyone done system pool on shared nothing cluster? How did you set it >> up? >> With default metadata replication set at 3, can you make use of four NSD >> nodes effectively? >> How would one design the location vectors and failure groups so that the >> system metadata is >> spread evenly across the four servers? >> >> Thanks, >> — ddj >> Dave Johnson >> _______________________________________________ >> gpfsug-discuss mailing list >> gpfsug-discuss at spectrumscale.org <http://spectrumscale.org/> >> http://gpfsug.org/mailman/listinfo/gpfsug-discuss >> <http://gpfsug.org/mailman/listinfo/gpfsug-discuss> >> > > Ellei edellä ole toisin mainittu: / Unless stated otherwise above: > Oy IBM Finland Ab > PL 265, 00101 Helsinki, Finland > Business ID, Y-tunnus: 0195876-3 > Registered in Finland > > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss
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