Re: Why is the performance of my lvmthin snapshot so poor
Gionatan Danti <[email protected]>
| Newsgroups | gmane.linux.lvm.general |
|---|---|
| Message-ID | <[email protected]> |
Il 2022-06-15 09:42 Zhiyong Ye ha scritto: > I regenerated the thin volume with the chunksize of 64K and the random > write performance data tested with fio 64k requests is as follows: > case iops > thin lv 9381 > snapshotted thin lv 8307 As expected, increasing I/O size (to avoid r/m/w) greatly reduced the issue (the ~11% hit is due to metadata allocation overhead). I don't see anything wrong, so I think you had to live with the previously recorded 10x performance hit when overwriting 4K blocks on a 64K chunk size thin volume... Regards. -- Danti Gionatan Supporto Tecnico Assyoma S.r.l. - www.assyoma.it email: [email protected] - [email protected] GPG public key ID: FF5F32A8 _______________________________________________ linux-lvm mailing list [email protected] https://listman.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/