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Ceph-disk (which ceph-deploy uses), uses GPT to partition OSDs so that
they can be automatically started by udev and reference partitions for
journals using unique identifiers. The necessary data to start the
OSD, the auth key, fsid, etc, are stored
On Fri, Sep 18, 2015 at 6:33 PM, Robert LeBlanc
wrote:
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>
> Depends on how easy it is to rebuild an OS from scratch. If you have
> something like Puppet or Chef that configure a node completely for
> you, it may not be too much of a pain to forgo
Hello!
On Sat, Sep 19, 2015 at 07:03:35AM +0200, martin wrote:
> Thanks all for the suggestions.
> Our storage nodes have plenty of RAM and their only purpose is to host the
> OSD daemons, so we will not create a swap partition on provisioning.
As an option, You can use swap file on demand. It
Thanks all for the suggestions.
Our storage nodes have plenty of RAM and their only purpose is to host the
OSD daemons, so we will not create a swap partition on provisioning.
For the OS disk we will then use a software raid 1 to handle eventually
disk failures. For provisioning the hosts we use
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If you decide to use swap, be warned that significant parts of the OSD
code can be swapped out even without memory pressure. This has caused
OSD processes to take 5 minutes to shut down in my experience. I would
recommend tuning swappiness in this ca
yes, a raid1 system disk is necessary, from my perspective.
And a swap partition is still needed even though the memory is big.
Martin Palma mailto:mar...@palma.bz>> 于
2015年9月18日，下午11:07写道：___
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Hi,
> On 18 Sep 2015, at 17:06, Martin Palma wrote:
>
> Hi,
>
> Is it a good idea to use a software raid for the system disk (Operating
> System) on a Ceph storage node? I mean only for the OS not for the OSD disks.
>
Yes, absolutely. Or even a hardware RAID if that's what you use elsewhere.
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Depends on how easy it is to rebuild an OS from scratch. If you have
something like Puppet or Chef that configure a node completely for
you, it may not be too much of a pain to forgo the RAID. We run our
OSD nodes from a single SATADOM and use Puppet
Hi,
Is it a good idea to use a software raid for the system disk (Operating
System) on a Ceph storage node? I mean only for the OS not for the OSD
disks.
And what about a swap partition? Is that needed?
Best,
Martin
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