Re: Understanding High Availability - iSCSI/CIFS/NFS

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On 04/04/2015 03:30 PM, Justin Chin-You wrote:
> Hi All,
> 
> Hoping someone can help me understand CEPH HA or point me in the direction
> of a doc I missed.
> 
> I understand how CEPH HA itself works in regards to PG, OSD and Monitoring.
> However what isn't clear for me is the failover in regards to things like
> iSCSI and the not yet production ready CIFS/NFS.
> 
> Scenario:
> I have 2 servers that are peered and running CEPH and I am replicating
> between both. Using CEPH I have iSCSI targets and CIFS/NFS stores.
> 
> In the event a server should fail how are iSCSI Initiators and CIFS/NFS
> clients re-directed? I am assuming Multipath and Virtual IPs but I can't
> figure out if this is something I need to configure/run on the OS side or
> if it is in CEPH itself.
> 

I think you are missing something here. Ceph does NOT talk iSCSI nor
NFS. It talks it's own protocol: RADOS

You might want to look into that a bit more. Ceph is also not intended
to run on just two machines. For a good Ceph cluster you need a couple
of machines, but preferably over 10.

You can re-export Ceph via NFS or iSCSI using a gateway, but that's
outside the Ceph project.

> Any help appreciated!
> 
> Thanks!
> 
> 
> 
> _______________________________________________
> ceph-users mailing list
> ceph-users@xxxxxxxxxxxxxx
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> 


-- 
Wido den Hollander
42on B.V.
Ceph trainer and consultant

Phone: +31 (0)20 700 9902
Skype: contact42on
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