zvoltrim

2017年4月14日 — ZFS respects SATA TRIM and SCSI unmap commands so when the OS marks a block deleted in will be released in the ZVOL. So all you need to do is to ...

2020年8月26日 — The problem here is that trim is not enabled on iSCSI and therefore is a configuration issue because the UNMAP command has to be send over the ...

2022年7月5日 — Since I do have an autotrim service (weekly) running on the physical pool on the host, do I need to also have an autotrim service running on the ...

ZVOLs - single dnode which references two dnodes. • disk data - dnode references an array of block pointers. • master node - records ZVOl-specific ...

2023年6月10日 — I'm running a bunch of VMs on a SSD (Crucial MX) pool. The ZVOLs are set up as sparce-provisioned and Auto-Trim is enabled on the pool.

2023年3月27日 — Your guest OS needs to issue trim command for ZFS to be made aware of which blocks on the Zvol are not really used anymore.

2019年3月29日 — ZVOL TRIM has enabled me to cut my write volume by 40% in production. Not space used, write IO volume. It's a neat trick. Upvote 1. Downvote

2023年2月26日 — At best, ZFS can be notified via unmap/TRIM that a block is no longer in use, but let's say your zvol's block size is 16KB, and you write ...

2023年6月17日 — My thin provisioned (sparse) zvol does not free up space upon trimming from inside the allocated VM, but is blowing up in size further and ...

2023年3月23日 — Now two things I observed: 1) The total used size exceeds the allocated zvol size. I assume this is because the snapshots consume space and that ...