[PVE-User] PRoxmox and ceph with just 3 server.

Gilberto Nunes gilberto.nunes32 at gmail.com
Fri Aug 31 13:01:53 CEST 2018


Thanks a lot for all this advice guys.
I still learn with Ceph.
So I have a doubt regarding how to change the weight from certain hdd
Is there some command to do that?

Em sex, 31 de ago de 2018 05:58, Ronny Aasen <ronny+pve-user at aasen.cx>
escreveu:

> when adding a older machine to your cluster, keep in mind that the
> slowest node with determine the overall speed of the ceph cluster (since
> a vm's disk will be spread all over)
>
>
> for RBD vm's you want low latency, so use things like
> nvram > ssd > hdd  with osd latency significant difference here.
>
> 100Gb/25Gb > 40Gb/10Gb (1Gb is useless in this case imho)
>
> as long as you have enough cores, higher ghz is better then lower ghz.
> due to lower latency
>
> kind regards.
> Ronny Aasen
>
>
>
> On 31. aug. 2018 00:21, Gilberto Nunes wrote:
> > An HPE Server will remain after deploy 3 servers with proxmox and ceph.
> > I thing I will use this HPE server as 4th node!
> >
> >
> > ---
> > Gilberto Nunes Ferreira
> >
> > (47) 3025-5907
> > (47) 99676-7530 - Whatsapp / Telegram
> >
> > Skype: gilberto.nunes36
> >
> >
> >
> >
> > 2018-08-30 18:16 GMT-03:00 Ronny Aasen <ronny+pve-user at aasen.cx>:
> >
> >> if HA is important, you should consider having a 4th ceph osd server
> (does
> >> not have to also be proxmox)
> >>
> >> with ceph's default of 3 replicas, that you will want to use in  a
> >> production setup, you do not have any failure domain.
> >> IOW the loss of any one node = a degraded ceph cluster.  if you have an
> >> additional node, ceph will rebalance and return to HEALTH_OK on the
> failure
> >> of a node.
> >>
> >> with vm's iops are important so you must keep latency to a minimum.
> >>
> >> both of these are explained a bit more in detail in the link he posted.
> >>
> >>
> >> kind regards
> >> Ronny Aasen
> >>
> >>
> >>
> >> On 30.08.2018 20:46, Gilberto Nunes wrote:
> >>
> >>> Hi Martin.
> >>>
> >>> Not really worried about highest performance, but to know if it will
> work
> >>> properly, mainly HA!
> >>> I plan work with mesh network too.
> >>>
> >>> Tanks a lot
> >>>
> >>> ---
> >>> Gilberto Nunes Ferreira
> >>>
> >>> (47) 3025-5907
> >>> (47) 99676-7530 - Whatsapp / Telegram
> >>>
> >>> Skype: gilberto.nunes36
> >>>
> >>>
> >>>
> >>>
> >>> 2018-08-30 15:40 GMT-03:00 Martin Maurer <martin at proxmox.com>:
> >>>
> >>> Hello,
> >>>>
> >>>> Not really. Please read in detail the following:
> >>>>
> >>>> https://forum.proxmox.com/threads/proxmox-ve-ceph-benchmark-
> >>>> 2018-02.41761/
> >>>>
> >>>>
> >>>> On 30.08.2018 16:47, Gilberto Nunes wrote:
> >>>>
> >>>> Hi there
> >>>>>
> >>>>> It's possible create a scenario with 3 PowerEdge r540, with Proxmox
> and
> >>>>> Ceph.
> >>>>> The server has this configuration:
> >>>>>
> >>>>> 32 GB memory
> >>>>> SAS 2x 300 GB
> >>>>> SSD 1x 480 GB
> >>>>>
> >>>>> 2 VM with SQL and Windows server.
> >>>>>
> >>>>> Thanks
> >>>>>
> >>>>> ---
> >>>>> Gilberto Nunes Ferreira
> >>>>>
> >>>>> (47) 3025-5907
> >>>>> (47) 99676-7530 - Whatsapp / Telegram
> >>>>>
> >>>>> Skype: gilberto.nunes36
> >>>>> _______________________________________________
> >>>>> pve-user mailing list
> >>>>> pve-user at pve.proxmox.com
> >>>>> https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
> >>>>>
> >>>>>
> >>>>> --
> >>>> Best Regards,
> >>>>
> >>>> Martin Maurer
> >>>>
> >>>> martin at proxmox.com
> >>>> http://www.proxmox.com
> >>>>
> >>>> ____________________________________________________________________
> >>>> Proxmox Server Solutions GmbH
> >>>> Bräuhausgasse 37, 1050 Vienna, Austria
> >>>> Commercial register no.: FN 258879 f
> >>>> Registration office: Handelsgericht Wien
> >>>>
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