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 11:46 Zhiyong Ye ha scritto: > I also think it meets expectations. But is there any other way to > optimize snapshot performance at the code level? Does it help to > reduce the chunksize size in the code, I see in the help documentation > that the chunksize can only be 64k minimum. I don't think forcing the code to use smaller recordsize is a good idea. Considering the hard limit on metadata size (16 GB max), 64K chunks are good for ~16 TB thin pool - already relatively small. A, say, 16K recordsize would be good for a 4 TB pool only, an so on. Moreover, sequential performance will significantly suffer. I think you have to accept the performance hit on first chunck allocation & rewrite. 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/