functions/Measure-DbaDiskSpaceRequirement.ps1
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function Measure-DbaDiskSpaceRequirement { <# .SYNOPSIS Calculate the space needed to copy and possibly replace a database from one SQL server to another. .DESCRIPTION Returns a file list from source and destination where source file may overwrite destination. Complex scenarios where a new file may exist is taken into account. This command will accept a hash object in pipeline with the following keys: Source, SourceDatabase, Destination. Using this command will provide a way to prepare before a complex migration with multiple databases from different sources and destinations. .PARAMETER Source Source SQL Server. .PARAMETER SourceSqlCredential Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential) .PARAMETER Database The database to copy. It MUST exist. .PARAMETER Destination Destination SQL Server instance. .PARAMETER DestinationSqlCredential Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential) .PARAMETER DestinationDatabase The database name at destination. May or may not be present, if unspecified it will default to the database name provided in SourceDatabase. .PARAMETER Credential The credentials to use to connect via CIM/WMI/PowerShell remoting. .PARAMETER EnableException By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message. This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting. Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch. .NOTES Tags: Database, DiskSpace, Migration Author: Pollus Brodeur (@pollusb) Website: https://dbatools.io Copyright: (C) Chrissy LeMaire, clemaire@gmail.com License: MIT https://opensource.org/licenses/MIT .LINK https://dbatools.io/Measure-DbaDiskSpaceRequirement .EXAMPLE Measure-DbaDiskSpaceRequirement -Source INSTANCE1 -Database DB1 -Destination INSTANCE2 Calculate space needed for a simple migration with one database with the same name at destination. .EXAMPLE @([PSCustomObject]@{Source='SQL1';Destination='SQL2';Database='DB1'}, [PSCustomObject]@{Source='SQL1';Destination='SQL2';Database='DB2'} ) | Measure-DbaDiskSpaceRequirement Using a PSCustomObject with 2 databases to migrate on SQL2. .EXAMPLE Import-Csv -Path .\migration.csv -Delimiter "`t" | Measure-DbaDiskSpaceRequirement | Format-Table -AutoSize Using a CSV file. You will need to use this header line "Source<tab>Destination<tab>Database<tab>DestinationDatabase". .EXAMPLE Invoke-DbaSqlCmd -SqlInstance DBA -Database Migrations -Query 'select Source, Destination, Database from dbo.Migrations' ` | Measure-DbaDiskSpaceRequirement Using a SQL table. We are DBA after all! #> [CmdletBinding()] param( [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true)] [DbaInstanceParameter]$Source, [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true)] [string]$Database, [PSCredential]$SourceSqlCredential, [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true)] [DbaInstanceParameter]$Destination, [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)] [string]$DestinationDatabase, [PSCredential]$DestinationSqlCredential, [PSCredential]$Credential, [Alias('Silent')] [switch]$EnableException ) begin { $local:cacheMP = @{} $local:cacheDP = @{} function Get-MountPointFromPath { [CmdletBinding()] param( [Parameter(Mandatory = $true)] $path, [Parameter(Mandatory = $true)] $computerName, [PSCredential]$credential ) if (!$cacheMP[$computerName]) { try { $cacheMP.Add($computerName, (Get-DbaDiskSpace -ComputerName $computerName -Credential $Credential -EnableException)) Write-Message -Level Verbose -Message "cacheMP[$computerName] is in cache" } catch { # This way, I won't be asking again for this computer. $cacheMP.Add($computerName, '?') Stop-Function -Message "Can't connect to $computerName. cacheMP[$computerName] = ?" -ErrorRecord $_ -Target $computerName -Continue } } if ($cacheMP[$computerName] -eq '?') { return '?' } foreach ($m in ($cacheMP[$computerName] | Sort-Object -Property Name -Descending)) { if ($path -like "$($m.Name)*") { return $m.Name } } Write-Message -Level Warning -Message "Path $path can't be found in any MountPoints of $computerName" } function Get-MountPointFromDefaultPath { [CmdletBinding()] param( [Parameter(Mandatory = $true)] [ValidateSet('Log', 'Data')] $DefaultPathType, [Parameter(Mandatory = $true)] $SqlInstance, [PSCredential]$SqlCredential, # Could probably use the computer defined in SqlInstance but info was already available from the caller $computerName, [PSCredential]$Credential ) if (!$cacheDP[$SqlInstance]) { try { $cacheDP.Add($SqlInstance, (Get-DbaDefaultPath -SqlInstance $SqlInstance -SqlCredential $SqlCredential -EnableException)) Write-Message -Level Verbose -Message "cacheDP[$SqlInstance] is in cache" } catch { Stop-Function -Message "Can't connect to $SqlInstance" -Continue $cacheDP.Add($SqlInstance, '?') return '?' } } if ($cacheDP[$SqlInstance] -eq '?') { return '?' } if (!$computerName) { $computerName = $cacheDP[$SqlInstance].ComputerName } if (!$cacheMP[$computerName]) { try { $cacheMP.Add($computerName, (Get-DbaDiskSpace -ComputerName $computerName -Credential $Credential)) } catch { Stop-Function -Message "Can't connect to $computerName." -Continue $cacheMP.Add($computerName, '?') return '?' } } if ($DefaultPathType -eq 'Log') { $path = $cacheDP[$SqlInstance].Log } else { $path = $cacheDP[$SqlInstance].Data } foreach ($m in ($cacheMP[$computerName] | Sort-Object -Property Name -Descending)) { if ($path -like "$($m.Name)*") { return $m.Name } } } } process { Write-Message -Level Verbose -Message "Connecting to SQL Servers." try { Write-Message -Level Verbose -Message "Connecting to $Source." $sourceServer = Connect-SqlInstance -SqlInstance $Source -SqlCredential $SourceSqlCredential } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $Source } try { Write-Message -Level Verbose -Message "Connecting to $Destination." $destServer = Connect-SqlInstance -SqlInstance $Destination -SqlCredential $DestinationSqlCredential } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $Destination } if (Test-Bound 'DestinationDatabase' -not) { $DestinationDatabase = $Database } Write-Message -Level Verbose -Message "$Source.[$Database] -> $Destination.[$DestinationDatabase]" $sourceDb = Get-DbaDatabase -SqlInstance $sourceServer -Database $Database -SqlCredential $SourceSqlCredential if (Test-Bound 'Database' -not) { Stop-Function -Message "Database [$Database] MUST exist on Source Instance $Source." -ErrorRecord $_ } $sourceFiles = @($sourceDb.FileGroups.Files | Select-Object Name, FileName, Size, @{n='Type'; e= {'Data'}}) $sourceFiles += @($sourceDb.LogFiles | Select-Object Name, FileName, Size, @{n='Type'; e= {'Log'}}) if ($destDb = Get-DbaDatabase -SqlInstance $destServer -Database $DestinationDatabase -SqlCredential $DestinationSqlCredential) { $destFiles = @($destDb.FileGroups.Files | Select-Object Name, FileName, Size, @{n='Type'; e= {'Data'}}) $destFiles += @($destDb.LogFiles | Select-Object Name, FileName, Size, @{n='Type'; e= {'Log'}}) $computerName = $destDb.ComputerName } else { Write-Message -Level Verbose -Message "Database [$DestinationDatabase] does not exist on Destination Instance $Destination." $computerName = $destServer.NetName } foreach ($sourceFile in $sourceFiles) { foreach ($destFile in $destFiles) { if ($found = ($sourceFile.Name -eq $destFile.Name)) { # Files found on both sides [PSCustomObject]@{ SourceComputerName = $sourceServer.NetName SourceInstance = $sourceServer.ServiceName SourceSqlInstance = $sourceServer.DomainInstanceName DestinationComputerName = $destServer.NetName DestinationInstance = $destServer.ServiceName DestinationSqlInstance = $destServer.DomainInstanceName SourceDatabase = $sourceDb.Name SourceLogicalName = $sourceFile.Name SourceFileName = $sourceFile.FileName SourceFileSize = [DbaSize]($sourceFile.Size * 1000) DestinationDatabase = $destDb.Name DestinationLogicalName = $destFile.Name DestinationFileName = $destFile.FileName DestinationFileSize = [DbaSize]($destFile.Size * 1000) * -1 DifferenceSize = [DbaSize]( ($sourceFile.Size * 1000) - ($destFile.Size * 1000) ) MountPoint = Get-MountPointFromPath -Path $destFile.Filename -ComputerName $computerName -Credential $Credential } | Select-DefaultView -ExcludeProperty SourceComputerName, SourceInstance, DestinationComputerName, DestinationInstance break } } if (!$found) { # Files on source but not on destination [PSCustomObject]@{ SourceComputerName = $sourceServer.NetName SourceInstance = $sourceServer.ServiceName SourceSqlInstance = $sourceServer.DomainInstanceName DestinationComputerName = $destServer.NetName DestinationInstance = $destServer.ServiceName DestinationSqlInstance = $destServer.DomainInstanceName SourceDatabase = $sourceDb.Name SourceLogicalName = $sourceFile.Name SourceFileName = $sourceFile.FileName SourceFileSize = [DbaSize]($sourceFile.Size * 1000) DestinationDatabase = $DestinationDatabase DestinationLogicalName = $null DestinationFileName = $null DestinationFileSize = [DbaSize]0 DifferenceSize = [DbaSize]($sourceFile.Size * 1000) MountPoint = Get-MountPointFromDefaultPath -DefaultPathType $sourceFile.Type -SqlInstance $destServer -SqlCredential $DestinationSqlCredential } | Select-DefaultView -ExcludeProperty SourceComputerName, SourceInstance, DestinationComputerName, DestinationInstance } } if ($destDb) { # Files on destination but not on source (strange scenario but possible) $destFilesNotSource = Compare-Object -ReferenceObject $destFiles -DifferenceObject $sourceFiles -Property Name -PassThru foreach ($destFileNotSource in $destFilesNotSource) { [PSCustomObject]@{ SourceComputerName = $sourceServer.NetName SourceInstance = $sourceServer.ServiceName SourceSqlInstance = $sourceServer.DomainInstanceName DestinationComputerName = $destServer.NetName DestinationInstance = $destServer.ServiceName DestinationSqlInstance = $destServer.DomainInstanceName SourceDatabaseName = $Database SourceLogicalName = $null SourceFileName = $null SourceFileSize = [DbaSize]0 DestinationDatabaseName = $destDb.Name DestinationLogicalName = $destFileNotSource.Name DestinationFileName = $destFile.FileName DestinationFileSize = [DbaSize]($destFileNotSource.Size * 1000) * -1 DifferenceSize = [DbaSize]($destFileNotSource.Size * 1000) * -1 MountPoint = Get-MountPointFromPath -Path $destFileNotSource.Filename -ComputerName $computerName -Credential $Credential } | Select-DefaultView -ExcludeProperty SourceComputerName, SourceInstance, DestinationComputerName, DestinationInstance } } $DestinationDatabase = $null } } |