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[Xen-devel] I/O priorities
- To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
- From: Авраменко Андрей <Andrey.Avramenko@xxxxxxxxxxx>
- Date: Fri, 9 Mar 2007 10:28:54 +0300
- Delivery-date: Thu, 08 Mar 2007 23:28:12 -0800
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
- Thread-index: AcdiHJfGh+v9EVyoRaSzME+mJUYxBg==
- Thread-topic: I/O priorities
Hi there!
Could you tell me if there available facilities to make priorities to disk i/o for guest domains?
I've make it with the folowing way:
I've started guest domains (xm create). Then I've make "ls -la" and found PIDs of xvd drivers. Then I've make priorities with "ionice" for this PIDs. The benchmarks:
1-st guest with Real Time class and second with idle class.
"dd if=/dev/zero of=/root/file.txt bs=1024 count=10240000"
1-st: 40Mb/sec
2-nd: 20Mb/sec
"hdparm -t /dev/xvda"
1-st: 25Mb/sec
2-ns: 2Mb/sec
Is it a right way to make disk subsystem priorities?
Thank you!
---
With best regards,
RHCE, Avramenko Andrew
JSC R-Style. Technical support. DIT.
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