XFS Preallocate using ALLOCSP

[Michael Monnerie]

On Dienstag 16 Juni 2009 Smit Shah wrote:
> In the vmware sparse disk

Ah, virtualization again. Yes, that's no good for performance ;-) 
There's a "defragment disk" button in VMware which simply copies the 
flat file on the filesystem in order to remove fragmentation. I guess 
running xfs_fsr would help more in that case. Did you try with that?

> chunks are allocated of the size of 64k,

It's a pity that there's no option to define how large each chunk should 
be. Using 1-50MB of real disk space for each new chunk could help a lot 
to keep the file less fragmented. It get's really funny when you run 
"defrag" within the VM on a sparse vdisk.

mfg zmi
-- 
// Michael Monnerie, Ing.BSc    -----      http://it-management.at
// Tel: 0660 / 415 65 31                      .network.your.ideas.
// PGP Key:         "curl -s http://zmi.at/zmi.asc | gpg --import"
// Fingerprint: AC19 F9D5 36ED CD8A EF38  500E CE14 91F7 1C12 09B4
// Keyserver: wwwkeys.eu.pgp.net                  Key-ID: 1C1209B4