Re: [lustre-discuss] ZFS atime is it required?
Thank you Andreas!! That is helpful. Regards, Amit From: Andreas Dilger Sent: Thursday, October 29, 2020 4:28 AM To: Kumar, Amit Cc: lustre-discuss@lists.lustre.org Subject: Re: [lustre-discuss] ZFS atime is it required? On Oct 23, 2020, at 14:03, Kumar, Amit mailto:ahku...@mail.smu.edu>> wrote: Dear All, Quick question, can I get away by setting "zfs set atime=off on_all_my_voulmes_mgt_mdt_and_osts" ? I ask this as it is noted to be performance boosting tip with the assumption filesystems(Lustre) handles all access times? You don't really need atime enabled on the OSTs, but I also don't think "atime=off" will make any difference. That is a VFS/ZPL level option, and Lustre osd-zfs doesn't use any of the ZPL code, but rather handles atime internally. Cheers, Andreas -- Andreas Dilger Principal Lustre Architect Whamcloud ___ lustre-discuss mailing list lustre-discuss@lists.lustre.org http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
Re: [lustre-discuss] ZFS atime is it required?
On Oct 23, 2020, at 14:03, Kumar, Amit mailto:ahku...@mail.smu.edu>> wrote: Dear All, Quick question, can I get away by setting “zfs set atime=off on_all_my_voulmes_mgt_mdt_and_osts” ? I ask this as it is noted to be performance boosting tip with the assumption filesystems(Lustre) handles all access times? You don't really need atime enabled on the OSTs, but I also don't think "atime=off" will make any difference. That is a VFS/ZPL level option, and Lustre osd-zfs doesn't use any of the ZPL code, but rather handles atime internally. Cheers, Andreas -- Andreas Dilger Principal Lustre Architect Whamcloud ___ lustre-discuss mailing list lustre-discuss@lists.lustre.org http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
[lustre-discuss] ZFS atime is it required?
Dear All, Quick question, can I get away by setting "zfs set atime=off on_all_my_voulmes_mgt_mdt_and_osts" ? I ask this as it is noted to be performance boosting tip with the assumption filesystems(Lustre) handles all access times? Thank you, Amit ___ lustre-discuss mailing list lustre-discuss@lists.lustre.org http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
