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45 lines
1.9 KiB
XML
45 lines
1.9 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="volume-deletion-garbage-collection">
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<title>Volume Deletion and Garbage Collection</title>
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<para>The deletion of a volume does not delete the snapshots that have been created from the
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volume</para>
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<para>When a VM is destroyed, data disk volumes that are attached to the VM are not
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deleted.</para>
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<para>Volumes are permanently destroyed using a garbage collection process. The global
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configuration variables expunge.delay and expunge.interval determine when the physical deletion
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of volumes will occur.</para>
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<itemizedlist>
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<listitem>
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<para>expunge.delay: determines how old the volume must be before it is destroyed, in
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seconds</para>
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</listitem>
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<listitem>
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<para>expunge.interval: determines how often to run the garbage collection check</para>
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</listitem>
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</itemizedlist>
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<para>Administrators should adjust these values depending on site policies around data
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retention.</para>
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</section>
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