Le 21/04/2014 16:34, Matthew BETTINGER a écrit :
... so that is why I installed on the MDS.
I do not see why changelogs means MDS. I think you do not know very well
how Changelogs work.
You've mounted a client on the MDS node, and this is what Robinhood is
using actually, not the MDS part.
Lustre Changelogs are always ready from a client, and cannot be read
from a simple MDT even if you really want it
Robinhoodadm and daemons installed on MDS
Lustrefilesystem mount is mounted on to the MDS itself /mnt/client/lustre
That's what makes all of this working.
MDS robinhood daemons send changelog updates to the mysql server IPoIB.
Watchout for your SQL traffic and be sure this is not a bottleneck.
If we have to run reports they would be executed from the mds
(rbh-report etc) , scary.
No reason to be scary, you do not have too run this on MDS as RBH only
needs a client.
It is now my understanding that we can put everything on one dedicated
server as long as it is connected to the IB fabric?We can get change
logs from the client ?
Not "you can", but "you must".
Aurélien
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