Dne 25. 10. 23 v 14:55 Borut Rozman napsal(a):
Hi everyone,
I have a machine where I run snapshots of the FS every 12 hours, and
keep a week lot of those snapshots. After a crash or a clean restart,
filesystem with snapshots does not get enabled and I have to wait
several hours for lvm snapshots to get back online which of course is
stressful. Last time I had to wait for 8 hours for all the snapshots to
get enabled and then I had to remove all the snapshots so my FS would
come up normally. I was wondering if this is a know issue or how can I
avoid this.
PS: FS is about 200TB in size and snapshots 5TB in size but they might
be even empty.
Hi
Unfortunately you are misusing the original *thick* snapshot purpose.
It's been designed to be a short living small sized object.
If your snapshot gets into the GiB range - it gets very very inefficient.
You should check the thin-pool and its snapshot capabilities - where your
operation should be mostly instant then. And there is not a problem of
amplified write when you take a multiple snapshot of the same volume and you
can even take snapshot of a snapshot.
With 5TiB old thick snapshot there is simply a zero chance to fly.
Regards
Zdenek
