[pve-devel] new cache benchmark results

[Alexandre DERUMIER]

On my proxmox host, I have the lvm partition begin at sector 66.

So it seem to be misaligned, it should be sector 64. (I don't know how lvm volumes are aligned inside this partition).

Recommandations on rhel6 and win2008 is now alignement on sector 2048 (which is best for ssd, as it's aligned on 1MB sdd cells)

# fdisk -l /dev/sda

Disk /dev/sda: 72.7 GB, 72746008576 bytes
255 heads, 63 sectors/track, 8844 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000e4e71

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          66      523264   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              66        8845    70516736   8e  Linux LVM




----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: "Michael Rasmussen" <mir at datanom.net>, pve-devel at pve.proxmox.com 
Envoyé: Lundi 12 Novembre 2012 05:52:59 
Objet: RE: [pve-devel] new cache benchmark results 

> (BTW: Maybe we need to check if default proxmox setup is correctly aligned) 

AFAIK it is correctly aligned.