RE: [Xen-users] Re: Differences in performance between file and LVMbased images.

["JHJE (Jan Holst Jensen)" <jhje@xxxxxxxxxxxxxxx>]

>  With LVMs the only issue is in setting it up. You will need 
> do some jumping through hoops to get / on the LVM. But after 
> that it is as flexible, and sometimes even easier to manage 
> than plain files. So given that they are similar in terms of 
> all other functionalities, to me it makes sense to use LVMs, 
> since the performance improvement for LVMs comes without any 
> other drawbacks.

I totally agree. To make life easier for myself configuration-wise I
have '/' and all other dom0 stuff on a normal SCSI (RAID) block device.
domUs are however served from other (logical) disks managed by LVM as a
single volume group.

sc31:~# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/cciss/c0d0p2      12G  1,5G  9,1G  14% /
tmpfs                  65M     0   65M   0% /dev/shm
/dev/cciss/c0d0p1     250M   31M  206M  13% /boot
/dev/cciss/c0d0p7      45G   33M   43G   1% /home
/dev/cciss/c0d0p3     7,4G   33M  7,0G   1% /tmp
/dev/cciss/c0d1p1      67G   39G   26G  61% /home/xen/staging
sc31:~# vgs
  VG       #PV #LV #SN Attr  VSize   VFree
  vm-disks   1  20   0 wz--n 136,72G 11,23G
sc31:~#

Cheers
-- Jan Holst Jensen, Novo Nordisk A/S, Denmark

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