Achim, Thankyou for your clear reply. Yes indeed we are using AFM at the moment.
From: [email protected] [mailto:[email protected]] On Behalf Of Achim Rehor Sent: Thursday, January 25, 2018 11:21 AM To: gpfsug main discussion list <[email protected]> Subject: Re: [gpfsug-discuss] storage-based replication for Spectrum Scale John, yes, they definitely can! Nodes in a remote cluster are tob viewed just as local nodes in terms of taking part in the mechanisms of access to data. Token management will be done just as with local nodes. So if one node in cluster A recognizes a communication issue with a node in cluster B, it will let the clustermgr know, and that one then decides on whether to expel one or the other. Having a remote cluster connected relies on a stable and low latency network, just as a local cluster does. if your network is not reliable, you woudl go for AFM or other replication mechanisms (as the thread title implies;) ) Mit freundlichen Grüßen / Kind regards Achim Rehor ________________________________ Software Technical Support Specialist AIX/ Emea HPC Support [cid:[email protected]] IBM Certified Advanced Technical Expert - Power Systems with AIX TSCC Software Service, Dept. 7922 Global Technology Services ________________________________ Phone: +49-7034-274-7862 IBM Deutschland E-Mail: [email protected]<mailto:[email protected]> Am Weiher 24 65451 Kelsterbach Germany ________________________________ IBM Deutschland GmbH / Vorsitzender des Aufsichtsrats: Martin Jetter Geschäftsführung: Martin Hartmann (Vorsitzender), Norbert Janzen, Stefan Lutz, Nicole Reimer, Dr. Klaus Seifert, Wolfgang Wendt Sitz der Gesellschaft: Ehningen / Registergericht: Amtsgericht Stuttgart, HRB 14562 WEEE-Reg.-Nr. DE 99369940 From: John Hearns <[email protected]<mailto:[email protected]>> To: gpfsug main discussion list <[email protected]<mailto:[email protected]>> Date: 25/01/2018 10:53 Subject: Re: [gpfsug-discuss] storage-based replication for Spectrum Scale Sent by: [email protected]<mailto:[email protected]> ________________________________ Jan Frode, thankyou for that link. I have a general question regarding remote GPFS filesystems. If we have two clusters, in separate locations on separate Infiniband fabrics, we can set up a remote relationship between filesystems. As Valdis discusses, what happens if the IP link between the clusters goes down or is unstable? Can nodes in one cluster vote out nodes in the other cluster? From: [email protected]<mailto:[email protected]> [mailto:[email protected]] On Behalf Of Jan-Frode Myklebust Sent: Wednesday, January 24, 2018 8:08 AM To: gpfsug main discussion list <[email protected]<mailto:[email protected]>> Subject: Re: [gpfsug-discuss] storage-based replication for Spectrum Scale Have you seen https://www.ibm.com/support/knowledgecenter/en/STXKQY_4.2.0/com.ibm.spectrum.scale.v4r2.adv.doc/bl1adv_dr.htm<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ibm.com%2Fsupport%2Fknowledgecenter%2Fen%2FSTXKQY_4.2.0%2Fcom.ibm.spectrum.scale.v4r2.adv.doc%2Fbl1adv_dr.htm&data=01%7C01%7Cjohn.hearns%40asml.com%7C1e23d7bb660147eab5c908d562f93422%7Caf73baa8f5944eb2a39d93e96cad61fc%7C1&sdata=iFBORcGPjln9bDh1d2vpOHAvjHAZuiNguvNwZSMJJ2g%3D&reserved=0>? Seems to cover what you're looking for.. -jf ons. 24. jan. 2018 kl. 07:33 skrev Harold Morales <[email protected]<mailto:[email protected]>>: Thanks for answering. Essentially, the idea being explored is to replicate LUNs between identical storage hardware (HP 3PAR volumesrein) on both sites. There is an IP connection between storage boxes but not between servers on both sites, there is a dark fiber connecting both sites. 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