New proxmox installation

[maudam]

Hi all,
i'm installing a new server with the latest proxmox to replace an old server with 1.9 version.
Actually i've setup the proxmox 3.3-1 on the machine. It is a dedicated server by Ovh.

Proxmox's setup created these partitions:

Number  Start   End     Size    File system     Name     Flags
 1      20.5kB  1049kB  1029kB                  primary  bios_grub
 2      2097kB  21.0GB  21.0GB  ext3            primary
 3      21.0GB  22.0GB  1073MB  linux-swap(v1)  primary
 4      22.0GB  4000GB  3978GB                  logical  lvm

I had to manually resize the lvm on partition 4 'cause the lv was only 2.61 Tib. After resize the lv is now 3.62 Tib. I had to manually extend the file system to use all space.

Why setup didn't use all space available on vg leaving 762 Gib not allocated in logical volume ?


Second question: The default filesystems used on the disk are

/dev/sda2 / ext3 rw,relatime,errors=remount-ro,user_xattr,acl,barrier=0,data=ordered 0 0
/dev/mapper/pve-data /var/lib/vz ext4 rw,relatime,barrier=1,data=ordered 0 0

The server have hardware raid (MegaRAID LSI 9271-4i Cachevault 1 GB) with 3 sata disks of 2Tb in raid 5 via a bbu raid controller with cache.

I'd like to know if overall disk performance will increase using btrfs or zfs insted of ext4 for vm data, assuming that the server will be used most for ct vm with a one or two full vm.

Thanks in advance

 

[Mitya]

I don't know about partition layout.
As for second question, it's may depend on your workload, but in most cases answer is "no". OK, it MAY be better to use xfs instead of ext4 for huge filesystem with many small files, but only if they're in OpenVZ containers. But then you may have some interesting bugs with disk quotas . For KVM i don't see any reasons for one host's file system to faster than another.

 

[udo]

Hi all,
i'm installing a new server with the latest proxmox to replace an old server with 1.9 version.
Actually i've setup the proxmox 3.3-1 on the machine. It is a dedicated server by Ovh.

Proxmox's setup created these partitions:

Number  Start   End     Size    File system     Name     Flags
 1      20.5kB  1049kB  1029kB                  primary  bios_grub
 2      2097kB  21.0GB  21.0GB  ext3            primary
 3      21.0GB  22.0GB  1073MB  linux-swap(v1)  primary
 4      22.0GB  4000GB  3978GB                  logical  lvm

I had to manually resize the lvm on partition 4 'cause the lv was only 2.61 Tib. After resize the lv is now 3.62 Tib. I had to manually extend the file system to use all space.

Why setup didn't use all space available on vg leaving 762 Gib not allocated in logical volume ?

Hi,
you must ask OVH for that.
The normal installer (cd-iso) create an boot-partition and then logical volumes for root, swap and data!

Udo