[SOLVED] OpenVZ Speeds are Slow on NAS Share

[Raymond Burns]

Anything dealing with OpenVZ on shared storage is unbearable slow. Any way to speed up CT Creation, Backup, and Restoration for CT's?
What log file do I show to help solve this issue?

pveversion -v

root@zwtprox1:/var/log/vzdump# pveversion -vpve-manager: 3.0-23 (pve-manager/3.0/957f0862)
running kernel: 2.6.32-22-pve
proxmox-ve-2.6.32: 3.0-107
pve-kernel-2.6.32-20-pve: 2.6.32-100
pve-kernel-2.6.32-22-pve: 2.6.32-107
lvm2: 2.02.95-pve3
clvm: 2.02.95-pve3
corosync-pve: 1.4.5-1
openais-pve: 1.1.4-3
libqb0: 0.11.1-2
redhat-cluster-pve: 3.2.0-2
resource-agents-pve: 3.9.2-4
fence-agents-pve: 4.0.0-1
pve-cluster: 3.0-4
qemu-server: 3.0-20
pve-firmware: 1.0-23
libpve-common-perl: 3.0-4
libpve-access-control: 3.0-4
libpve-storage-perl: 3.0-8
vncterm: 1.1-4
vzctl: 4.0-1pve3
vzprocps: 2.0.11-2
vzquota: 3.1-2
pve-qemu-kvm: 1.4-13
ksm-control-daemon: 1.1-1

 

[Raymond Burns]

Is it safe to assume that if I purchase a license for my servers, this issue will be resolved? It is not specific to my server setup, and it is not specific to my NAS OS. I don't have the servers in full formation just yet to be able to buy the license, but I don't want there to be issues with my VPS Provisioning project, that could have been forseen.

 

[Raymond Burns]

That's ok.
NAS sync was still enabled for all the new datasets I created.
The original dataset I had created for ZFS had sync disabled, but I created new datasets for the new Containers, and the sync was still standard.
So if you have slow speeds, turn off sync. If it changes, reenable sync and purchase a SLOG device to combat the speed issue.

 

[mir]

There is also one other setting which can improve speed providing at least a high speed duo core CPU. The trick is to enable the compression algorithm LZ4. Why does enabling compression improves speed? The reason is that using compression greatly reduces the amount of data needed to be written to the storage. LZ4 will in general be able to compress the data with 30% which also, roughly, will increase the speed by 25-30%. https://calomel.org/zfs_raid_speed_capacity.html

 

[Raymond Burns]

How do you set that with omnios?

[COLOR=#4D3E32][FONT=verdana]zpool set feature@lz4_compress=enabled poolname[/FONT][/COLOR]

Those are for freenas and nas4free, but I know there are a lot of differences with Illumos and Solaris directives.

 

[mir]

The same way. To see this then try:
zpool get feature@lz4_compress poolname