As of today AFM does not support replication or caching of the filesystem or fileset level metadata like quotas, replication factors etc.. , it only supports replication of user's metadata and data. Users have to make sure that same quotas are set at both cache and home clusters. An error message is logged (mmfs.log) at AFM cache gateway if the home have quotas exceeded, and the queue will be stuck until the quotas are increased at the home cluster.
~Venkat ([email protected]) From: Ryan Novosielski <[email protected]> To: gpfsug main discussion list <[email protected]> Date: 10/11/2019 11:13 PM Subject: [EXTERNAL] [gpfsug-discuss] Quotas and AFM Sent by: [email protected] Does anyone have any good resources or experience with quotas and AFM caches? Our scenario is that we have an AFM home one one site, an AFM cache on another site, and then a client cluster on that remote site that mounts the cache. The AFM filesets are IW. One of them contains our home directories, which have a quota set on the home side. Quotas were disabled entirely on the cache side (I enabled them recently, but did not set them to anything). What I believe we’re running into is scary long AFM queues that are caused by people writing an amount that is over the home quota to the cache, but the cache is accepting it and then failing to sync back to the home because the user is at their hard limit. I believe we’re also seeing delays on unaffected users who are not over their quota, but that’s harder to tell. We have the AFM gateways poorly/not tuned, so that is likely interacting. Is there any way to make the quotas apparent to the cache cluster too, beyond setting a quota there as well, or do I just fundamentally misunderstand this in some other way? We really just want the quotas on the home cluster to be enforced everywhere, more or less. Thanks! -- ____ || \\UTGERS, |---------------------------*O*--------------------------- ||_// the State | Ryan Novosielski - [email protected] || \\ University | Sr. Technologist - 973/972.0922 (2x0922) ~*~ RBHS Campus || \\ of NJ | Office of Advanced Research Computing - MSB C630, Newark `' _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=92LOlNh2yLzrrGTDA7HnfF8LFr55zGxghLZtvZcZD7A&m=v6Rlb90lfAveMK0img3_DIq6tq6dce4WXaxNhN0TDBQ&s=PNlMZJgKMhodVCByv07nOOiyF2Sr498Rd4NmIaOkL9g&e=
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