Re: Experience reducing size 3 to 2 on production cluster?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hello,

avoid size 2 whenever you can. As long as you know that you might lose
data, it can be an acceptable risk while migrating the cluster. We had that
in the past multiple time and it is a valid use case in our opinion.
However make sure to monitor the state and recover as fast as possible.
Leave min_size on 2 as well and accept the potential downtime!

--
Martin Verges
Managing director

Mobile: +49 174 9335695  | Chat: https://t.me/MartinVerges

croit GmbH, Freseniusstr. 31h, 81247 Munich
CEO: Martin Verges - VAT-ID: DE310638492
Com. register: Amtsgericht Munich HRB 231263
Web: https://croit.io | YouTube: https://goo.gl/PGE1Bx


On Fri, 10 Dec 2021 at 18:05, Marco Pizzolo <marcopizzolo@xxxxxxxxx> wrote:

> Hello,
>
> As part of a migration process where we will be swinging Ceph hosts from
> one cluster to another we need to reduce the size from 3 to 2 in order to
> shrink the footprint sufficiently to allow safe removal of an OSD/Mon node.
>
> The cluster has about 500M objects as per dashboard, and is about 1.5PB in
> size comprised solely of small files served through CephFS to Samba.
>
> Has anyone encountered a similar situation?  What (if any) problems did you
> face?
>
> Ceph 14.2.22 bare metal deployment on Centos.
>
> Thanks in advance.
>
> Marco
> _______________________________________________
> ceph-users mailing list -- ceph-users@xxxxxxx
> To unsubscribe send an email to ceph-users-leave@xxxxxxx
>
_______________________________________________
ceph-users mailing list -- ceph-users@xxxxxxx
To unsubscribe send an email to ceph-users-leave@xxxxxxx



[Index of Archives]     [Information on CEPH]     [Linux Filesystem Development]     [Ceph Development]     [Ceph Large]     [Ceph Dev]     [Linux USB Development]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [xfs]


  Powered by Linux