[PVE-User] Force reclaiming space on a vdisk...
Marco Gaiarin
gaio at lilliput.linux.it
Thu Jan 20 11:47:28 CET 2022
Mandi! Daniel Plominski
In chel di` si favelave...
> enable ZFS set compression=lz4 on the zvolume
Seems just enabled:
root at ctpve1:~# zpool get all rpool | grep lz4
rpool feature at lz4_compress active local
root at ctpve1:~# zpool get all rpool-data | grep lz4
rpool-data feature at lz4_compress active local
> and perform a memory limit dd run (inside the vm).
> dd if=/dev/zero of=/mountpoint_sda7/CLEANUP bs=99M count=xxx
> (this will release the storage space)
OK. But i've just deleted the partitions. I have to create a new partition,
format them, create a 'dd-zero' file in them and then the space will be
released?
Really?!
I'm asking because i supposed that was the 'trim/thin' feature of ZFS to
permit to shrink a disk (eg, 'don't save the unallocated space'), not the
compressione feature (eg, 'don't save a bunch of consecutive zero, compress
it').
Speaking more clearly, i hope: i've perfectly clear that 'zeroing' a portion
of a disk permit the compression feature of zfs to compress it, but i
supposed that was the management of allocated spaces that make their
business here... i'm only a bit puzzled.
I hope someone can clarify, thanks.
PS: this server have a 'Proxmox VE Community Subscription 1 CPU/year'
currently active on, but i prefere if possible to use mailing list for this
support question. FYI.
--
Ognuno vada dove vuole andare, ognuno invecchi come gli pare
ma non raccontate a me che cos'e` la LIBERTA`. (F. Guccini)
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