Bob, like most questions of this time I think the answer depends on a number of variables. Generally we do not recommend running the mmcheckquota command during the peak usage of your Spectrum Scale system. As I think you know the command will increase the IO to the NSDs that hold metadata and the number of NSDs that hold metadata will contribute to the time it takes for the command to complete, i.e. more metadata NSDs should improve the overall execution time.
Regards, The Spectrum Scale (GPFS) team ------------------------------------------------------------------------------------------------------------------ If you feel that your question can benefit other users of Spectrum Scale (GPFS), then please post it to the public IBM developerWroks Forum at https://www.ibm.com/developerworks/community/forums/html/forum?id=11111111-0000-0000-0000-000000000479 . If your query concerns a potential software error in Spectrum Scale (GPFS) and you have an IBM software maintenance contract please contact 1-800-237-5511 in the United States or your local IBM Service Center in other countries. The forum is informally monitored as time permits and should not be used for priority messages to the Spectrum Scale (GPFS) team. From: "Oesterlin, Robert" <[email protected]> To: gpfsug main discussion list <[email protected]> Date: 08/16/2019 11:57 AM Subject: [EXTERNAL] [gpfsug-discuss] Running mmcheckquota on a file system with 1.3B files Sent by: [email protected] I want to run mmcheckquota on a file system I have on my ESS. It has 1.3B files. Obviously it will take a long time, but I’m looking for anyone who has guidance running this command on a large file system, what I should expect for IO load. - Should I set QOS to minimize impact? - Run directly on the ESS IO nodes, or some other nodes? Bob Oesterlin Sr Principal Storage Engineer, Nuance _______________________________________________ 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=DwICAg&c=jf_iaSHvJObTbx-siA1ZOg&r=IbxtjdkPAM2Sbon4Lbbi4w&m=WUpGs2Rz2EHGkbHv8FBmwheiONLdqvqSIS2FfIlCcc4&s=LX8or_PP0SLUsKP9Kb0wWE1u5jz84jQR-paJuklTvu4&e=
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