Thanks! I have just found some.
On Wed, Oct 7, 2015 at 12:51 AM, Patrick Farrell <paf(a)cray.com> wrote:
That depends on what you mean. It's not possible to have two active MGS
servers, but it is possible to configure MGS failover in an active-passive
manner. The Lustre manual (and various places online) have more
On 10/06/2015 02:23 AM, Nguyen Viet Cuong wrote:
Can MGS be replicated?
On Tue, Oct 6, 2015 at 3:33 PM, Dilger, Andreas <andreas.dilger(a)intel.com>
> The main disadvantage today is that if the MGS is on the same server as
> the MDS, then if that node fails it isn't possible to use "Imperative
> Recovery", where the MGS notifies clients that the MDS has restarted.
> Instead, this would mean that the clients need to time out their most
> recent RPC/ping before they notice the MDS has failed.
> That could increases recovery time by 100s or longer, depending on the
> number of clients in the system. If faster recovery is less of an issue
> than having a dedicated MGS node, then it is fine to have them on a single
> node. Note also that the MGS could run on the backup MDS to avoid the
> need to have a dedicated MGS node.
> Cheers, Andreas
> Andreas Dilger
> Lustre Software Architect
> Intel High Performance Data Division
> On 2015/10/05, 10:26 AM, "HPDD-discuss on behalf of Narsimha Reddy" <
> hpdd-discuss-bounces(a)lists.01.org> on behalf of narsimhalocuz(a)gmail.com
> <mailto:firstname.lastname@example.org>> wrote:
> Dear Team,
> Can any one mention what are the disadvantages of having MDS and MDT
> configured on a single server compared to configuration of having MGS and
> MDT on different servers.
> Thanks & Regards,
> HPDD-discuss mailing list
Nguyen Viet Cuong
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