Qemu slow disk throughput
I am doing some development for a UN community site, using Zope/Plone. I uses Qemu for hosting the guest OS for my development environment.
For 2 days, I keep wondering why Zope/Plone loads damn slow on the qemu machine eventhough I have allocated both cores of the processor, and 512RAM for it. 15 minutes simply to start up is really not desirable. I kept on investigating and guess what:
Just for a comparison, the host hdd's speed:
Darn.. So, thats what the reason. Dear lazywebs, anybody know how to improve the speed??.
For 2 days, I keep wondering why Zope/Plone loads damn slow on the qemu machine eventhough I have allocated both cores of the processor, and 512RAM for it. 15 minutes simply to start up is really not desirable. I kept on investigating and guess what:
[root@unapcict ~]# /sbin/hdparm -t /dev/hda
/dev/hda:
Timing buffered disk reads: 18 MB in 3.03 seconds = 5.95 MB/secJust for a comparison, the host hdd's speed:
[root@Nobuyuki ~]# /sbin/hdparm -t /dev/sdc
/dev/sdc:
Timing buffered disk reads: 174 MB in 3.01 seconds = 57.71 MB/secDarn.. So, thats what the reason. Dear lazywebs, anybody know how to improve the speed??.
Comments
have u tried user mode linux?
Below is Xen server: -
# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 778 MB in 3.00 seconds = 259.28 MB/sec
Below is Xen guest: -
# hdparm -t /dev/xvda
/dev/xvda:
Timing buffered disk reads: 438 MB in 3.00 seconds = 145.88 MB/sec