“zfs 'userused@' properties” and “'zfs userspace' command” are good enough to gather usage statistics. I think I mix that with NetApp. If my memory is correct, we have to set quotas to get usage statistics under DataOnTAP. Further, if we can add an ILM-like feature to poll the time-related info(atime,mtime,ctime,etc) with that statistic from ZFS, that will be really cool.
Since no one is focusing on enabling default user/group quota now, the temporarily remedy could be a script which traverse all the users/groups in the directory tree. Tough it is not so decent. Currently, dedup/compression is pool-based right now, they don’t have the granularity on file system or user or group level. There is also a lot of improving space in this aspect. Thanks. Fred From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of Richard Elling Sent: 星期四, 四月 26, 2012 0:48 To: Eric Schrock Cc: zfs-discuss@opensolaris.org; develo...@lists.illumos.org Subject: Re: [zfs-discuss] [developer] Setting default user/group quotas[usage accounting]? On Apr 25, 2012, at 8:14 AM, Eric Schrock wrote: ZFS will always track per-user usage information even in the absence of quotas. See the the zfs 'userused@' properties and 'zfs userspace' command. tip: zfs get -H -o value -p userused@username filesystem Yes, and this is the logical size, not physical size. Some ZFS features increase logical size (copies) while others decrease physical size (compression, dedup) -- richard -- ZFS Performance and Training richard.ell...@richardelling.com<mailto:richard.ell...@richardelling.com> +1-760-896-4422
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