Per https://www.ibm.com/support/knowledgecenter/STXKQY_5.0.4/com.ibm.spectrum.scale.v5r04.doc/bl1ins_nsdfail.htm and confirmed by several instances in a live environment...
> This disk would exist solely to contain a replica of the file system > descriptor (that is, it would not contain any file system metadata or data). > This disk should be at least 128MB in size. From: [email protected] <[email protected]> On Behalf Of Christoph Krafft Sent: Friday, March 13, 2020 11:00 To: [email protected] Subject: [gpfsug-discuss] Spectrum Scale Sizing Questions -> Typical size of descOnly NSD & Network latency/throughput requirements quorum-only node This message was sent by an external party. Dear Spectrum Scale User Group, can somebody please share with me answers to the following setup / architectural questions: - What size is typically required for a descOnly NSD, that will only hold a copy of a filesystem descriptor area? - Having a 2-node "core-cluster" and a quorum node at a third site with locally attached descOnly NSDs to that q-node. What are the network latency / bandwidth requirements for traffic flowing between core-cluster-nodes and the q-node? (from my understanding the traffic contains primarily mmfsd communication - including FS descOnly updates - but no data/metadata I/O) Thank you in advance for answers - have a nice weekend. Mit freundlichen Grüßen / Sincerely Christoph Krafft Client Technical Specialist - Power Systems, IBM Systems Certified IT Specialist @ The Open Group ________________________________ Phone: +49 (0) 7034 643 2171 IBM Deutschland GmbH [cid:[email protected]] Mobile: +49 (0) 160 97 81 86 12 Am Weiher 24 Email: [email protected]<mailto:[email protected]> 65451 Kelsterbach Germany ________________________________ IBM Data Privacy Statement<https://www.ibm.com/privacy/us/en/> IBM Deutschland GmbH / Vorsitzender des Aufsichtsrats: Martin Jetter Geschäftsführung: Gregor Pillen (Vorsitzender), Agnes Heftberger, Norbert Janzen, Markus Koerner, Christian Noll, Nicole Reimer Sitz der Gesellschaft: Ehningen / Registergericht: Amtsgericht Stuttgart, HRB 14562 / WEEE-Reg.-Nr. DE 99369940
_______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
