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