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From: "Ralf Groß" <ralf.gross+xfs@gmail.com>
To: linux-xfs@vger.kernel.org
Subject: memory requirements for a 400TB fs with reflinks
Date: Sat, 20 Mar 2021 19:01:37 +0100	[thread overview]
Message-ID: <CANSSxym1ob76jW9i-1ZLfEe4KSHA5auOnZhtXykRQg0efAL+WA@mail.gmail.com> (raw)

Hi,

I plan to deploy a couple of Linux (RHEL 8.x) server as Veeam backup
repositories. Base for this might be high density server with 58 x
16TB disks, 2x  RAID 60, each with its own raid controller and 28
disks. So each RAID 6 has 14 disks, + 2 globale spare.

I wonder what memory requirement such a server would have, is there
any special requirement regarding reflinks? I remember that xfs_repair
has been a problem in the past, but my experience with this is from 10
years ago. Currently I plan to use 192GB RAM, this would be perfect as
it utilizes 6 memory channels and 16GB DIMMs are not so expensive.

Thanks - Ralf

             reply	other threads:[~2021-03-20 18:02 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-20 18:01 Ralf Groß [this message]
2021-03-22 16:50 ` memory requirements for a 400TB fs with reflinks Ralf Groß
2021-03-22 21:50   ` Dave Chinner
2021-03-23  9:39     ` Ralf Groß
2021-03-23 22:02       ` Dave Chinner
2021-03-23  9:31   ` Lucas Stach

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