thx for this heads up ..
we know ... it's all GNR .. so the answer is a bit different, depending on the scenario
on the regular building blocks.. the RG Layout (2 RGs per BB) .. is different from the scale out ECE (#4+ nodes, one RG )
The absolute max #vdisk is ( I think ) 512 per RG - but I would not recommend to go that far , when designing a data layout .. if ever possible..
we can have a short talk next week on that..
Try to keep the #vdisk as small as you can is the better approach ..
From: "Dietrich, Stefan" <[email protected]>
To: gpfsug main discussion list <[email protected]>
Date: 12/13/2019 02:26 AM
Subject: [EXTERNAL] Re: [gpfsug-discuss] Max number of vdisks in a recovery group - is it 64?
Sent by: [email protected]
Hello Heiner,
the 64 vdisk limit per RG is still present in the latest ESS docs:
https://www.ibm.com/support/knowledgecenter/SSYSP8_5.3.5/com.ibm.spectrum.scale.raid.v5r04.adm.doc/bl1adv_vdisks.htm
For the other questions, no idea.
Regards,
Stefan
----- Original Message -----
> From: "Billich Heinrich Rainer (ID SD)" <[email protected]>
> To: "gpfsug main discussion list" <[email protected]>
> Sent: Thursday, December 12, 2019 3:26:31 PM
> Subject: [gpfsug-discuss] Max number of vdisks in a recovery group - is it 64?
> Hello,
>
> I remember that a GNR/ESS recovery group can hold up to 64 vdisks, but I can’t
> find a citation to proof it. Now I wonder if 64 is the actual limit? And where
> is it documented? And did the limit change with versions? Thank you. I did
> spend quite some time searching the documentation, no luck .. maybe you know.
>
> We run ESS 5.3.4.1 and the recovery groups have current/allowable format
> version 5.0.0.0
>
> Thank you,
>
> Heiner
> --
> =======================
> Heinrich Billich
> ETH Zürich
> Informatikdienste
> Tel.: +41 44 632 72 56
> [email protected]
> ========================
>
>
>
>
> _______________________________________________
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