[PVE-User] Qcow2 and raw format, disk provisioning and SSDs
miguel_3_gonzalez at yahoo.es
Mon Nov 27 12:32:54 CET 2017
I am migrating from a server with Proxmox 4.4-18 with SATA drives to a
Proxmox 5.1-36 with SSD drives.
I am trying to get the best in performance. I already split OS and data
disk drives so /home folder is not being backed up by Proxmox, only OS.
Filesystem Size Used Avail Use% Mounted on
/dev/sda5 29G 17G 12G 58% /
tmpfs 8.3G 0 8.3G 0% /dev/shm
/dev/sdb1 50G 33G 14G 71% /home
/dev/sda1 504M 178M 301M 38% /boot
/dev/sda2 2.0G 75M 1.8G 4% /tmp
The sda drive was 250 Gb and I shrink it to 36 Gb. I have already zeroed
all sda partitions with dd but still after converting qcow2 following
this https://pve.proxmox.com/wiki/Shrink_Qcow2_Disk_Files the resulting
qcow2 file is 48 Gb, not 36-40 Gb.
Something am I missing?
On the other hand, a few more questions:
- Should I move to RAW format? Pros? Cons? I have read that backups take
longer but performance boost is better.
- Anything that I have to change in Proxmox settings when using SSD
instead of SATA?
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