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6250c85912
Signed-off-by: radhikap <radhika.puthiyetath@citrix.com> Signed-off-by: Joe Brockmeier <jzb@zonker.net>
99 lines
4.6 KiB
XML
99 lines
4.6 KiB
XML
<?xml version='1.0' encoding='utf-8' ?>
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<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % BOOK_ENTITIES SYSTEM "cloudstack.ent">
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%BOOK_ENTITIES;
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]>
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<!-- Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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<section id="resizing-volumes">
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<title>Resizing Volumes</title>
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<para>&PRODUCT; provides the ability to resize data disks; &PRODUCT; controls volume size by using
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disk offerings. This provides &PRODUCT; administrators with the flexibility to choose how much
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space they want to make available to the end users. Volumes within the disk offerings with the
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same storage tag can be resized. For example, if you only want to offer 10, 50, and 100 GB
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offerings, the allowed resize should stay within those limits. That implies if you define a 10
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GB, a 50 GB and a 100 GB disk offerings, a user can upgrade from 10 GB to 50 GB, or 50 GB to 100
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GB. If you create a custom-sized disk offering, then you have the option to resize the volume by
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specifying a new, larger size. </para>
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<para>Additionally, using the resizeVolume API, a data volume can be moved from a static disk
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offering to a custom disk offering with the size specified. This functionality allows those who
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might be billing by certain volume sizes or disk offerings to stick to that model, while
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providing the flexibility to migrate to whatever custom size necessary. </para>
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<para>This feature is supported on KVM, XenServer, and VMware hosts. However, shrinking volumes is
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not supported on VMware hosts.</para>
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<para>Before you try to resize a volume, consider the following:</para>
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<itemizedlist>
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<listitem>
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<para>The VMs associated with the volume are stopped.</para>
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</listitem>
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<listitem>
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<para>The data disks associated with the volume are removed.</para>
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</listitem>
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<listitem>
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<para>When a volume is shrunk, the disk associated with it is simply truncated, and doing so
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would put its content at risk of data loss. Therefore, resize any partitions or file systems
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before you shrink a data disk so that all the data is moved off from that disk.</para>
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</listitem>
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</itemizedlist>
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<para>To resize a volume:</para>
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<orderedlist>
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<listitem>
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<para>Log in to the &PRODUCT; UI as a user or admin.</para>
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</listitem>
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<listitem>
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<para>In the left navigation bar, click Storage.</para>
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</listitem>
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<listitem>
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<para>In Select View, choose Volumes.</para>
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</listitem>
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<listitem>
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<para>Select the volume name in the Volumes list, then click the Resize Volume button <inlinemediaobject>
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<imageobject>
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<imagedata fileref="./images/resize-volume-icon.png"/>
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</imageobject>
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<textobject>
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<phrase>resize-volume-icon.png: button to display the resize volume option.</phrase>
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</textobject>
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</inlinemediaobject></para>
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</listitem>
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<listitem>
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<para>In the Resize Volume pop-up, choose desired characteristics for the storage.</para>
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<mediaobject>
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<imageobject>
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<imagedata fileref="./images/resize-volume.png"/>
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</imageobject>
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<textobject>
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<phrase>resize-volume.png: option to resize a volume.</phrase>
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</textobject>
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</mediaobject>
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<orderedlist numeration="loweralpha">
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<listitem>
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<para>If you select Custom Disk, specify a custom size.</para>
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</listitem>
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<listitem>
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<para>Click Shrink OK to confirm that you are reducing the size of a volume. </para>
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<para>This parameter protects against inadvertent shrinking of a disk, which might lead to
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the risk of data loss. You must sign off that you know what you are doing.</para>
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</listitem>
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</orderedlist>
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</listitem>
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<listitem>
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<para>Click OK.</para>
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</listitem>
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</orderedlist>
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</section>
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