[Fedora-xen] expected disk performance?

[Kwan Lowe]

> On Tue, 2006-05-23 at 13:31 +0100, Stephen C. Tweedie wrote:
>
>>  File-backed guest:
>>   dom0 hdparm -t:	85.7138 MB/sec
>>   domU hdparm -t:	75.2901 MB/sec
>
> That was rawhide; I get similar performance from current FC5:
>
>     domU hdparm -t: 	77.99 MB/sec
>
> and identical results testing the raw disk rate with lmdd.

Bleah.. didn't CC the list:

Mine:

DBD - 5G LVM partition on a 7200RPM IDE 200G:
[root at xm-fc5-001 ~]# dd if=/dev/zero of=/home/foo bs=4k count=25000
25000+0 records in
25000+0 records out
102400000 bytes (102 MB) copied, 2.06112 seconds, 49.7 MB/s

DBD - 120G dedicated disk 7200RPM IDE (phy device set as xvdb)
[root at xm-fc5-001 ~]# dd if=/dev/zero of=/export/foo bs=4k count=25000
25000+0 records in
25000+0 records out
102400000 bytes (102 MB) copied, 0.719008 seconds, 142 MB/s

hdparm returns similar results. The first physical device is shared with four other
DomU's.


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