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64 lines
4.0 KiB
XML
64 lines
4.0 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="creating-new-volumes">
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<title>Creating a New Volume</title>
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<para>You can add more data disk volumes to a guest VM at any time, up to the limits of your storage capacity. Both &PRODUCT; administrators and users can add volumes to VM instances. When you create a new volume, it is stored as an entity in &PRODUCT;, but the actual storage resources are not allocated on the physical storage device until you attach the volume. This optimization allows the &PRODUCT; to provision the volume nearest to the guest that will use it when the first attachment is made.</para>
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<section id="local-storage-data-volumes">
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<title>Using Local Storage for Data Volumes</title>
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<para>You can create data volumes on local storage (supported with XenServer, KVM, and VMware).
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The data volume is placed on the same
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host as the VM instance that is attached to the data volume. These
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local data volumes can be attached to virtual machines, detached, re-attached,
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and deleted just as with the other types of data volume.</para>
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<para>Local storage is ideal for scenarios where persistence of data volumes and HA
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is not required. Some of the benefits include reduced disk I/O latency and cost
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reduction from using inexpensive local disks.</para>
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<para>In order for local volumes to be used, the feature must be enabled for the
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zone.</para>
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<para>You can create a data disk offering for local storage. When a user creates a
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new VM, they can select this disk offering in order to cause the data disk
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volume to be placed in local storage.</para>
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<para>You can not migrate a VM that has a volume in local storage to a different
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host, nor migrate the volume itself away to a different host. If you want to put
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a host into maintenance mode, you must first stop any VMs with local data
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volumes on that host.</para>
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</section>
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<section id="creating-new-volume-steps">
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<title>To Create a New Volume</title>
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<orderedlist>
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<listitem><para>Log in to the &PRODUCT; UI as a user or admin.</para></listitem>
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<listitem><para>In the left navigation bar, click Storage.</para></listitem>
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<listitem><para>In Select View, choose Volumes.</para></listitem>
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<listitem><para>To create a new volume, click Add Volume, provide the following details, and click OK.</para>
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<itemizedlist>
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<listitem><para>Name. Give the volume a unique name so you can find it later.</para></listitem>
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<listitem><para>Availability Zone. Where do you want the storage to reside? This should be close to the VM that will use the volume.</para></listitem>
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<listitem><para>Disk Offering. Choose the characteristics of the storage.</para></listitem>
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</itemizedlist>
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<para>The new volume appears in the list of volumes with the state “Allocated.” The volume data is stored in &PRODUCT;, but the volume is not yet ready for use</para></listitem>
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<listitem><para>To start using the volume, continue to Attaching a Volume </para></listitem>
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</orderedlist>
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</section>
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</section>
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