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RE: [Xen-users] Re: Xen domU physical partition disk I/O write throughput %50 slower

From: "Hills, Steve" <Steve.Hills@xxxxxxxxxxxx>

Date: Wed, 29 Sep 2010 13:45:46 -0400

Delivery-date: Wed, 29 Sep 2010 10:47:07 -0700

List-id: Xen user discussion <xen-users.lists.xensource.com>

Thread-index: ActfhidR33f1aWQ3TW+vP6VUqWVvqQAc02eg

Thread-topic: [Xen-users] Re: Xen domU physical partition disk I/O write throughput %50 slower

Note: the bonnie run was from a different time than the dd run but the difference is still 40%-50%. ----- From dom0 (2G mem) bonnie -s 4096 Bonnie 1.4: File './Bonnie.14020', size: 4294967296, volumes: 1 Writing with putc()... done: 63109 kB/s 160.1 %CPU Rewriting... done: 34731 kB/s 4.0 %CPU Writing intelligently... done: 91248 kB/s 10.6 %CPU Reading with getc()... done: 58771 kB/s 105.3 %CPU Reading intelligently... done: 100379 kB/s 4.5 %CPU time dd if=/dev/zero of=test bs=1K count=1048576 conv=fdatasync 1048576+0 records in 1048576+0 records out 1073741824 bytes (1.1 GB) copied, 16.9593 s, 63.3 MB/s real 0m17.162s user 0m0.356s sys 0m4.344s ----- From domU (2G mem) bonnie -s 4096 Bonnie 1.4: File './Bonnie.2089', size: 4294967296, volumes: 1 Writing with putc()... done: 47753 kB/s 57.6 %CPU Rewriting... done: 25996 kB/s 2.8 %CPU Writing intelligently... done: 50126 kB/s 7.3 %CPU Reading with getc()... done: 69383 kB/s 70.4 %CPU Reading intelligently... done: 101596 kB/s 5.0 %CPU time dd if=/dev/zero of=test bs=1K count=1048576 conv=fdatasync 1048576+0 records in 1048576+0 records out 1073741824 bytes (1.1 GB) copied, 26.6137 s, 41.9 MB/s real 0m25.741s user 0m0.512s sys 0m6.500s Steve Hills Teradata Corporation steve.hills@xxxxxxxxxxxx -----Original Message----- From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of khris4 Sent: Tuesday, September 28, 2010 8:25 PM To: xen-users@xxxxxxxxxxxxxxxxxxx Subject: [Xen-users] Re: Xen domU physical partition disk I/O write throughput %50 slower Can you provide us with some statistics. -- View this message in context: http://xen.1045712.n5.nabble.com/Xen-domU-physical-partition-disk-I-O-wr ite-throughput-50-slower-tp2896613p2952475.html Sent from the Xen - User mailing list archive at Nabble.com. _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users

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