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                    <h1 id="test-dbalastbackup">Test-DbaLastBackup</h1>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>Author</strong></td>
<td>Chrissy LeMaire (@cl), netnerds.net</td>
</tr>
<tr>
<td><strong>Availability</strong></td>
<td>Windows, Linux, macOS</td>
</tr>
</tbody>
</table>
<p> </p>
<p>Want to see the source code for this command? Check out <a href="https://github.com/dataplat/dbatools/blob/master/public/Test-DbaLastBackup.ps1">Test-DbaLastBackup</a> on GitHub.
<br>
Want to see the Bill Of Health for this command? Check out <a href="https://dataplat.github.io/boh#Test-DbaLastBackup">Test-DbaLastBackup</a>.</p>
<h2 id="synopsis">Synopsis</h2>
<p>Quickly and easily tests the last set of full backups for a server.</p>
<h2 id="description">Description</h2>
<p>Restores all or some of the latest backups and performs a DBCC CHECKDB.</p>
<ol>
<li>Gathers information about the last full backups</li>
<li>Restores the backups to the Destination with a new name. If no Destination is specified, the originating SQL Server instance wil be used.</li>
<li>The database is restored as &quot;dbatools-testrestore-$databaseName&quot; by default, but you can change dbatools-testrestore to whatever you would like using -Prefix</li>
<li>The internal file names are also renamed to prevent conflicts with original database</li>
<li>A DBCC CHECKDB is then performed</li>
<li>And the test database is finally dropped</li>
</ol>
<h2 id="syntax">Syntax</h2>
<pre><code>Test-DbaLastBackup
    [[-SqlInstance] &lt;DbaInstanceParameter[]&gt;]
    [[-SqlCredential] &lt;PSCredential&gt;]
    [[-Database] &lt;Object[]&gt;]
    [[-ExcludeDatabase] &lt;Object[]&gt;]
    [[-Destination] &lt;DbaInstanceParameter&gt;]
    [[-DestinationSqlCredential] &lt;Object&gt;]
    [[-DataDirectory] &lt;String&gt;]
    [[-LogDirectory] &lt;String&gt;]
    [[-FileStreamDirectory] &lt;String&gt;]
    [[-Prefix] &lt;String&gt;]
    [-VerifyOnly]
    [-NoCheck]
    [-NoDrop]
    [-CopyFile]
    [[-CopyPath] &lt;String&gt;]
    [[-MaxSize] &lt;Int32&gt;]
    [[-DeviceType] &lt;String[]&gt;]
    [-IncludeCopyOnly]
    [-IgnoreLogBackup]
    [[-AzureCredential] &lt;String&gt;]
    [[-InputObject] &lt;Database[]&gt;]
    [[-MaxTransferSize] &lt;Int32&gt;]
    [[-BufferCount] &lt;Int32&gt;]
    [-IgnoreDiffBackup]
    [[-MaxDop] &lt;Int32&gt;]
    [-ReuseSourceFolderStructure]
    [-EnableException]
    [-WhatIf]
    [-Confirm]
    [&lt;CommonParameters&gt;]

</code></pre>
<p> </p>
<h2 id="examples">Examples</h2>
<p> </p>
<h5 id="example-1">Example:  1</h5>
<pre><code>PS C:\&gt; Test-DbaLastBackup -SqlInstance sql2016
</code></pre>
<p>Determines the last full backup for ALL databases, attempts to restore all databases (with a different name and file structure), then performs a DBCC CHECKDB. Once the test is complete, the test <br>
restore will be dropped.<br></p>
<h5 id="example-2">Example:  2</h5>
<pre><code>PS C:\&gt; Test-DbaLastBackup -SqlInstance sql2016 -Database SharePoint_Config
</code></pre>
<p>Determines the last full backup for SharePoint_Config, attempts to restore it, then performs a DBCC CHECKDB.<br></p>
<h5 id="example-3">Example:  3</h5>
<pre><code>PS C:\&gt; Get-DbaDatabase -SqlInstance sql2016, sql2017 | Test-DbaLastBackup
</code></pre>
<p>Tests every database backup on sql2016 and sql2017<br></p>
<h5 id="example-4">Example:  4</h5>
<pre><code>PS C:\&gt; Get-DbaDatabase -SqlInstance sql2016, sql2017 -Database SharePoint_Config | Test-DbaLastBackup
</code></pre>
<p>Tests the database backup for the SharePoint_Config database on sql2016 and sql2017<br></p>
<h5 id="example-5">Example:  5</h5>
<pre><code>PS C:\&gt; Test-DbaLastBackup -SqlInstance sql2016 -Database model, master -VerifyOnly
</code></pre>
<p>Skips performing an action restore of the database and simply verifies the backup using VERIFYONLY option of the restore.<br></p>
<h5 id="example-6">Example:  6</h5>
<pre><code>PS C:\&gt; Test-DbaLastBackup -SqlInstance sql2016 -NoCheck -NoDrop
</code></pre>
<p>Skips the DBCC CHECKDB check. This can help speed up the tests but makes it less tested. The test restores will remain on the server.<br></p>
<h5 id="example-7">Example:  7</h5>
<pre><code>PS C:\&gt; Test-DbaLastBackup -SqlInstance sql2016 -DataDirectory E:\bigdrive -LogDirectory L:\bigdrive -MaxSize 10240
</code></pre>
<p>Restores data and log files to alternative locations and only restores databases that are smaller than 10 GB.<br></p>
<h5 id="example-8">Example:  8</h5>
<pre><code>PS C:\&gt; Test-DbaLastBackup -SqlInstance sql2014 -Destination sql2016 -CopyFile
</code></pre>
<p>Copies the backup files for sql2014 databases to sql2016 default backup locations and then attempts restore from there.<br></p>
<h5 id="example-9">Example:  9</h5>
<pre><code>PS C:\&gt; Test-DbaLastBackup -SqlInstance sql2014 -Destination sql2016 -CopyFile -CopyPath &quot;\\BackupShare\TestRestore\&quot;
</code></pre>
<p>Copies the backup files for sql2014 databases to sql2016 default backup locations and then attempts restore from there.<br></p>
<h5 id="example-10">Example:  10</h5>
<pre><code>PS C:\&gt; Test-DbaLastBackup -SqlInstance sql2016 -NoCheck -MaxTransferSize 4194302 -BufferCount 24
</code></pre>
<p>Determines the last full backup for ALL databases, attempts to restore all databases (with a different name and file structure).<br>
The Restore will use more memory for reading the backup files. Do not set these values to high or you can get an Out of Memory error!!!<br>
When running the restore with these additional parameters and there is other server activity it could affect server OLTP performance. Please use with caution.<br>
Prior to running, you should check memory and server resources before configure it to run automatically.<br>
More information:<br>
<a href="https://www.mssqltips.com/sqlservertip/4935/optimize-sql-server-database-restore-performance/">https://www.mssqltips.com/sqlservertip/4935/optimize-sql-server-database-restore-performance/</a><br></p>
<h5 id="example-11">Example:  11</h5>
<pre><code>PS C:\&gt; Test-DbaLastBackup -SqlInstance sql2016 -MaxDop 4
</code></pre>
<p>The use of the MaxDop parameter will limit the number of processors used during the DBCC command<br></p>
<h3 id="optional-parameters">Optional Parameters</h3>
<h5 id="sqlinstance">-SqlInstance</h5>
<p>The target SQL Server instance or instances. Unlike many of the other commands, you cannot specify more than one server.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="sqlcredential">-SqlCredential</h5>
<p>Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential).<br />
Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported.<br />
For MFA support, please use Connect-DbaInstance.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="database">-Database</h5>
<p>The database backups to test. If -Database is not provided, all database backups will be tested.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="excludedatabase">-ExcludeDatabase</h5>
<p>Exclude specific Database backups to test.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="destination">-Destination</h5>
<p>The destination server to use to test the restore. By default, the Destination will be set to the source server<br />
If a different Destination server is specified, you must ensure that the database backups are on a shared location<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="destinationsqlcredential">-DestinationSqlCredential</h5>
<p>Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential).<br />
Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported.<br />
For MFA support, please use Connect-DbaInstance.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="datadirectory">-DataDirectory</h5>
<p>Specifies an alternative directory for mdfs, ndfs and so on. The command uses the SQL Server's default data directory for all restores.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="logdirectory">-LogDirectory</h5>
<p>Specifies an alternative directory for ldfs. The command uses the SQL Server's default log directory for all restores.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="filestreamdirectory">-FileStreamDirectory</h5>
<p>Specifies a directory for filestream data.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="prefix">-Prefix</h5>
<p>The database is restored as &quot;dbatools-testrestore-$databaseName&quot; by default. You can change dbatools-testrestore to whatever you would like using this parameter.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>dbatools-testrestore-</td>
</tr>
</tbody>
</table>
<h5 id="verifyonly">-VerifyOnly</h5>
<p>If this switch is enabled, VERIFYONLY will be performed. An actual restore will not be executed.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<h5 id="nocheck">-NoCheck</h5>
<p>If this switch is enabled, DBCC CHECKDB will be skipped<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<h5 id="nodrop">-NoDrop</h5>
<p>If this switch is enabled, the newly-created test database will not be dropped.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<h5 id="copyfile">-CopyFile</h5>
<p>If this switch is enabled, the backup file will be copied to the destination default backup location unless CopyPath is specified.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<h5 id="copypath">-CopyPath</h5>
<p>Specifies a path relative to the SQL Server to copy backups when CopyFile is specified. If not specified will use destination default backup location. If destination SQL Server is not local, admin<br />
UNC paths will be utilized for the copy.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="maxsize">-MaxSize</h5>
<p>Max size in MB. Databases larger than this value will not be restored.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>0</td>
</tr>
</tbody>
</table>
<h5 id="devicetype">-DeviceType</h5>
<p>Specifies a filter for backup sets based on DeviceTypes. Valid options are 'Disk','Permanent Disk Device', 'Tape', 'Permanent Tape Device','Pipe','Permanent Pipe Device','Virtual Device', in addition<br />
to custom integers for your own DeviceTypes.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="includecopyonly">-IncludeCopyOnly</h5>
<p>If this switch is enabled, copy only backups will be counted as a last backup.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<h5 id="ignorelogbackup">-IgnoreLogBackup</h5>
<p>If this switch is enabled, transaction log backups will be ignored. The restore will stop at the latest full or differential backup point.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<h5 id="azurecredential">-AzureCredential</h5>
<p>The name of the SQL Server credential on the destination instance that holds the key to the azure storage account.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="inputobject">-InputObject</h5>
<p>Enables piping from Get-DbaDatabase<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>true (ByValue)</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="maxtransfersize">-MaxTransferSize</h5>
<p>Parameter to set the unit of transfer. Values must be a multiple of 64kb and a max of 4GB<br />
Parameter is used as passthrough for Restore-DbaDatabase.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>0</td>
</tr>
</tbody>
</table>
<h5 id="buffercount">-BufferCount</h5>
<p>Number of I/O buffers to use to perform the operation.<br />
Reference: <a href="https://msdn.microsoft.com/en-us/library/ms178615.aspx#data-transfer-options">https://msdn.microsoft.com/en-us/library/ms178615.aspx#data-transfer-options</a><br />
Parameter is used as passthrough for Restore-DbaDatabase.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>0</td>
</tr>
</tbody>
</table>
<h5 id="ignorediffbackup">-IgnoreDiffBackup</h5>
<p>If this switch is enabled, differential backups will be ignored. The restore will only use Full and Log backups, so will take longer to complete<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<h5 id="maxdop">-MaxDop</h5>
<p>Allows you to pass in a MAXDOP setting to the DBCC CheckDB command to limit the number of parallel processes used.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>0</td>
</tr>
</tbody>
</table>
<h5 id="reusesourcefolderstructure">-ReuseSourceFolderStructure</h5>
<p>By default, databases will be migrated to the destination Sql Server's default data and log directories. You can override this by specifying -ReuseSourceFolderStructure.<br />
The same structure on the SOURCE will be kept exactly, so consider this if you're migrating between different versions and use part of Microsoft's default Sql structure (MSSql12.INSTANCE, etc)<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<h5 id="enableexception">-EnableException</h5>
<p>By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.<br />
This avoids overwhelming you with &quot;sea of red&quot; exceptions, but is inconvenient because it basically disables advanced scripting.<br />
Using this switch turns this &quot;nice by default&quot; feature off and enables you to catch exceptions with your own try/catch.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td></td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td>False</td>
</tr>
</tbody>
</table>
<h5 id="whatif">-WhatIf</h5>
<p>If this switch is enabled, no actions are performed but informational messages will be displayed that explain what would happen if the command were to run.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td>wi</td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<h5 id="confirm">-Confirm</h5>
<p>If this switch is enabled, you will be prompted for confirmation before executing any operations that change state.<br></p>
<table>
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>Alias</td>
<td>cf</td>
</tr>
<tr>
<td>Required</td>
<td>False</td>
</tr>
<tr>
<td>Pipeline</td>
<td>false</td>
</tr>
<tr>
<td>Default Value</td>
<td></td>
</tr>
</tbody>
</table>
<p> </p>

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