Very Slow Write

[sm2x]

test script: for i in {1..24}; do cp 1GB.bin testDir/$i; done
mounted without VDO: ~5 secs
mounted with VDO compression + dedup: 28 minutes

Running on server specs
8x2 cpus
64gb ram
ssd drives

Environment:
Ubuntu 22.04.4 (5.15.0-97-generic)
LVM version: 2.03.11-2.1ubuntu4
VDO version: 8.2.2.2
KVDO version: 8.2.3.3
Filesystem xfs
$ lvcreate --vdo -L8.5T -V8.5T --metadataprofile vdo_create -n vdx0 mediarepo/vdopool0
UDS Sparse Indexing
32gb slab size
4 logical
3 physical
4 cpu
2 hash
8 bio
2 ack threads
100gb cache

[bjohnsto]

Hi @sm2x. I've been assigned to your ticket and will be investigating. I will be trying to reproduce the issue here, but in the meantime, I was wondering if you could send the following information:

1. lsblk
2. dmsetup table
3. lvs

Also, if you happen to have a script or anything that you ran to set up your environment (raided drives, xfs config) it would be good to get that as well.

Thanks
Bruce