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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>13.5. Working with Snapshots</title><link rel="stylesheet" type="text/css" href="Common_Content/css/default.css" /><link rel="stylesheet" media="print" href="Common_Content/css/print.css" type="text/css" /><meta name="generator" content="publican 2.8" /><meta name="package" content="Apache_CloudStack-Admin_Guide-4.0.0-incubating-en-US-1-" /><link rel="home" href="index.html" title="CloudStack Administrator's Guide" /><link rel="up" href="storage.html" title="Chapter 13. Working With Storage" /><link rel="prev" href="working-with-volumes.html" title="13.4. Using Swift for Secondary Storage" /><link rel="next" href="work-with-usage.html" title="Chapter 14. Working with Usage" /></head><body><p id="title"><a class="left" href="http://cloudstack.org"><img src="Common_Content/images/image_left.png" alt="Product Site" /></a><a class="right" href="http://docs.cloudstack.org"><img src="Common_Content/images/image_right.png" alt="Documentation Site" /></a></p><ul class="docnav"><li class="previous"><a accesskey="p" href="working-with-volumes.html"><strong>Prev</strong></a></li><li class="next"><a accesskey="n" href="work-with-usage.html"><strong>Next</strong></a></li></ul><div xml:lang="en-US" class="section" id="working-with-snapshots" lang="en-US"><div class="titlepage"><div><div><h2 class="title" id="working-with-snapshots">13.5. Working with Snapshots</h2></div></div></div><div class="para">
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(Supported for the following hypervisors: <span class="bold bold"><strong>XenServer</strong></span>, <span class="bold bold"><strong>VMware vSphere</strong></span>, and <span class="bold bold"><strong>KVM</strong></span>)
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</div><div class="para">
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CloudStack supports snapshots of disk volumes. Snapshots are a point-in-time capture of virtual machine disks. Memory and CPU states are not captured.
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Snapshots may be taken for volumes, including both root and data disks. The administrator places a limit on the number of stored snapshots per user. Users can create new volumes from the snapshot for recovery of particular files and they can create templates from snapshots to boot from a restored disk.
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</div><div class="para">
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Users can create snapshots manually or by setting up automatic recurring snapshot policies. Users can also create disk volumes from snapshots, which may be attached to a VM like any other disk volume. Snapshots of both root disks and data disks are supported. However, CloudStack does not currently support booting a VM from a recovered root disk. A disk recovered from snapshot of a root disk is treated as a regular data disk; the data on recovered disk can be accessed by attaching the disk to a VM.
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</div><div class="para">
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A completed snapshot is copied from primary storage to secondary storage, where it is stored until deleted or purged by newer snapshot.
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</div></div><ul class="docnav"><li class="previous"><a accesskey="p" href="working-with-volumes.html"><strong>Prev</strong>13.4. Using Swift for Secondary Storage</a></li><li class="up"><a accesskey="u" href="#"><strong>Up</strong></a></li><li class="home"><a accesskey="h" href="index.html"><strong>Home</strong></a></li><li class="next"><a accesskey="n" href="work-with-usage.html"><strong>Next</strong>Chapter 14. Working with Usage</a></li></ul></body></html>
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