Dear All, I have a related question. The documentation says nothing about the recommended recordsize for MDTs with ZFS backend. Are there any recommendation? Or is data on MDTs stored in a way that the recordsize does not matter?
Thanks, Robert On 09/28/2018 12:54 AM, Andreas Dilger wrote: > Firstly, we don't test anything larger than 1MB. > > Secondly, the best recordsize is up to the apication IO pattern. If it > is streaming writes, it might be OK. If it is random write then > probably not. > > Cheers, Andreas > > On Sep 27, 2018, at 19:04, Riccardo Veraldi > <[email protected] <mailto:[email protected]>> > wrote: > >> Hello, >> >> I have always been using ZFS record size to 1MB with Lustre on top of >> ZFS. Anyway it is possible to set it to more than 1MB. May this have >> any benefit in performance and is it recommended to set for example: >> >> echo 4194304 > /sys/module/zfs/parameters/zfs_max_recordsize >> zfs set recordsize=4m zpool >> >> >> Thank you. >> >> Rick >> >> >> _______________________________________________ >> lustre-discuss mailing list >> [email protected] <mailto:[email protected]> >> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org > > > _______________________________________________ > lustre-discuss mailing list > [email protected] > http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
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