Date: Sun, 4 Sep 2016 17:16:23 +0200 From: Ben RUBSON <ben.rubson@gmail.com> To: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: [ZFS] refquota is very slow ! Message-ID: <EDDE17FC-1B3A-4912-B93C-08E18433A4C9@gmail.com> In-Reply-To: <1524067530.1937.a66cb17f-9141-4bef-b758-5bb129d16681.open-xchange@ox.internetx.com> References: <D559DE69-A535-427C-A401-1458C2AA8C31@gmail.com> <1472914773423.63807@kuleuven.be> <0E828163-AEAB-4C8C-BFCF-93D42B3DB3B6@gmail.com> <1524067530.1937.a66cb17f-9141-4bef-b758-5bb129d16681.open-xchange@ox.internetx.com>
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Same kind of results with a single local (SSD) disk based pool, refquota takes much more time than quota around the limit. Here is the output for this single disk based pool : zfs get all : http://pastebin.com/raw/TScgy0ps zdb : http://pastebin.com/raw/BxmQ4xNx zpool get all : http://pastebin.com/raw/XugMbydy Thank you ! Ben > On 04 Sep 2016, at 13:42, InterNetX - Juergen Gotteswinter <juergen.gotteswinter@internetx.com> wrote: > > Did you try the same in a single local disk based pool? And pls post output of > zfs get all, zdb & zpool get all > > >> Ben RUBSON <ben.rubson@gmail.com> hat am 4. September 2016 um 11:28 >> geschrieben: >> >> >> Juergen & Bram, >> >> Thank you for your feedback. >> >> I then investigated further and think I found the root cause. >> >> No issue with refquota in my zroot pool containing (in this example) 300.000 >> inodes used. >> >> However, refquota is terribly slow in my data pool containing around >> 12.000.000 inodes used. >> >> I then created 12.000.000 empty file in my zroot pool, in a test dataset. >> I put a refquota on this dataset and created a dd file to fulfil empty space. >> And around the limit, it began to stall... >> I then created an empty dataset in the same pool, refquota is even slow in >> this dataset having no inode used. >> The root cause seems then to be the total number of inodes used in the pool... >> >> Some numbers : >> Time to fulfil 512MB with quota : 17s >> Time to fulfil 512MB with refquota : 3m35s >> >> Very strange. >> >> Do you experience the same thing ? >> >> Thank you again, >> >> Ben >> >>> On 03 Sep 2016, at 16:59, Bram Vandoren <bram.vandoren@kuleuven.be> wrote: >>> >>> I encountered the same problem over NFS. I didn't manage to reproduce it not >>> using NFS. I think the userquota property works without any problem though. >>> >>> Cheers, >>> Bram. >> >>> On 03 Sep 2016, at 12:26, InterNetX - Juergen Gotteswinter >>> <juergen.gotteswinter@internetx.com> wrote: >>> >>> cant confirm this, works like a charm without difference to normal quota >>> setting >> >> _______________________________________________ >> freebsd-fs@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-fs >> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"help
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