If you can wait a few more month we will have stats for this in Zimon. Sven On Apr 15, 2016 12:02 PM, "Oesterlin, Robert" <[email protected]> wrote:
> This command is just using ssh to all the nodes and dumping the waiter > information and collecting it. That means if the node is down, slow to > respond, or there are a large number of nodes, it could take a while to > return. In my 400-500 node clusters this command usually take less than 10 > seconds. I do prefix the command with a timeout value in case a node is > hung up and ssh never returns (which it sometimes does, and that’s not the > fault of GPFS) Something like this: > > timeout 45s /usr/lpp/mmfs/bin/mmlsnode -N waiters –L > > This means I get incomplete information, but if you don’t you end up > piling up a lot of hung up commands. I would check over your cluster > carefully to see if there are other issues that might cause ssh to hang up > – which could impact other GPFS commands that distribute via ssh. > > Another approach would be to dump the waiters locally on each node, send > node specific information to the database, and then sum it up using the > graphing software. > > Bob Oesterlin > Sr Storage Engineer, Nuance HPC Grid > > From: <[email protected]> on behalf of Roland > Pabel <[email protected]> > Organization: RRZK Uni Köln > Reply-To: gpfsug main discussion list <[email protected]> > Date: Friday, April 15, 2016 at 10:50 AM > To: gpfsug main discussion list <[email protected]> > Subject: Re: [gpfsug-discuss] Executing Callbacks on other Nodes > > Hi, > > In our cluster, mmlsnode –N waiters –L takes about 25 seconds to run. So > running it every 30 seconds is a bit close. I'll try running it once a > minute > and then incorporating this into our graphing. > > Maybe the command is so slow for me because a few nodes are down? > Is there a parameter to mmlsnode to configure the timeout? > > > > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss > >
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