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add docs: disk I/O statistics and disk I/O throttling (KVM)

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Wei Zhou 2013-09-27 15:41:13 +02:00
parent 2c0430610d
commit a463f5eccc
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docs/en-US/Release_Notes.xml
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@ -868,6 +868,22 @@ under the License.
</listitem>
</itemizedlist>
</section>
<section id="vm-disk-statistics">
<title>Disk I/O statistics for VMs</title>
<para>(Supported on KVM)</para>
<para>The disk I/O statistics for virtual machines, including read/write (bytes and I/O requests)
are collected and save in the database from &PRODUCT; 4.2. The data are also managed by
&PRODUCT; Usage Server. You can get the statistics through listUsageRecords API call. </para>
<para>This functionality is supported from libvirt 0.9.4. </para>
</section>
<section id="vm-disk-throttling">
<title>Disk I/O throttling for VMs</title>
<para>(Supported on KVM)</para>
<para>In &PRODUCT; 4.2, you can limit the read/write rate (bytes and I/O requests per second)
at user's virtual machines. This is useful to deduce the mutual influence between the
virtual machines running on the same storage device.</para>
<para>This functionality is supported from libvirt 0.9.8 and QEMU 1.1.0.</para>
</section>
</section>
<section id="ops">
<title>Monitoring, Maintenance, and Operations Enhancements</title>