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40 lines
2.0 KiB
XML
40 lines
2.0 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="snapshot-performance-vmware">
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<title>VMware Volume Snapshot Performance</title>
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<para>When you take a snapshot of a data or root volume on VMware, &PRODUCT; uses an
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efficient storage technique to improve performance.</para>
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<para>A snapshot is not immediately exported from vCenter to a mounted NFS
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share and packaged into an OVA file format. This operation would consume time and resources.
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Instead, the original file formats (e.g., VMDK) provided by vCenter are
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retained. An OVA file will only be created as needed, on demand. To generate the OVA,
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&PRODUCT; uses information in a properties file (*.ova.meta) which it stored along with
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the original snapshot data. </para>
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<note><para>For upgrading customers: This process applies only to newly created snapshots after upgrade to &PRODUCT;
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4.2. Snapshots that have already been taken and stored in OVA format will continue to
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exist in that format, and will continue to work as expected.</para></note>
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<para/>
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</section>
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