functions/Measure-DbaBackupThroughput.ps1
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function Measure-DbaBackupThroughput { <# .SYNOPSIS Determines how quickly SQL Server is backing up databases to media. .DESCRIPTION Returns backup history details for one or more databases on a SQL Server. Output looks like this: SqlInstance : sql2016 Database : SharePoint_Config AvgThroughput : 1.07 MB AvgSize : 24.17 AvgDuration : 00:00:01.1000000 MinThroughput : 0.02 MB MaxThroughput : 2.26 MB MinBackupDate : 8/6/2015 10:22:01 PM MaxBackupDate : 6/19/2016 12:57:45 PM BackupCount : 10 .PARAMETER SqlInstance The target SQL Server instance or instances. .PARAMETER SqlCredential Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential). Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported. For MFA support, please use Connect-DbaInstance. .PARAMETER Database The database(s) to process. Options for this list are auto-populated from the server. If unspecified, all databases will be processed. .PARAMETER ExcludeDatabase The database(s) to exclude. Options for this list are auto-populated from the server. .PARAMETER Type By default, this command measures the speed of Full backups. Valid options are "Full", "Log" and "Differential". .PARAMETER Since All backups taken on or after the point in time represented by this datetime object will be processed. .PARAMETER Last If this switch is enabled, only the last backup will be measured. .PARAMETER DeviceType Specifies one or more DeviceTypes to use in filtering backup sets. Valid values are "Disk", "Permanent Disk Device", "Tape", "Permanent Tape Device", "Pipe", "Permanent Pipe Device" and "Virtual Device", as well as custom integers for your own DeviceTypes. .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: Backup, Database Author: Chrissy LeMaire (@cl), netnerds.net Website: https://dbatools.io Copyright: (c) 2018 by dbatools, licensed under MIT License: MIT https://opensource.org/licenses/MIT .LINK https://dbatools.io/Measure-DbaBackupThroughput .EXAMPLE PS C:\> Measure-DbaBackupThroughput -SqlInstance sql2016 Parses every backup in msdb's backuphistory for stats on all databases. .EXAMPLE PS C:\> Measure-DbaBackupThroughput -SqlInstance sql2016 -Database AdventureWorks2014 Parses every backup in msdb's backuphistory for stats on AdventureWorks2014. .EXAMPLE PS C:\> Measure-DbaBackupThroughput -SqlInstance sql2005 -Last Processes the last full, diff and log backups every backup for all databases on sql2005. .EXAMPLE PS C:\> Measure-DbaBackupThroughput -SqlInstance sql2005 -Last -Type Log Processes the last log backups every backup for all databases on sql2005. .EXAMPLE PS C:\> Measure-DbaBackupThroughput -SqlInstance sql2016 -Since (Get-Date).AddDays(-7) | Where-Object { $_.MinThroughput.Gigabyte -gt 1 } Gets backup calculations for the last week and filters results that have a minimum of 1GB throughput .EXAMPLE PS C:\> Measure-DbaBackupThroughput -SqlInstance sql2016 -Since (Get-Date).AddDays(-365) -Database bigoldb Gets backup calculations, limited to the last year and only the bigoldb database #> [CmdletBinding()] param ( [parameter(Mandatory, ValueFromPipeline)] [DbaInstanceParameter[]]$SqlInstance, [PSCredential]$SqlCredential, [object[]]$Database, [object[]]$ExcludeDatabase, [datetime]$Since, [switch]$Last, [ValidateSet("Full", "Log", "Differential", "File", "Differential File", "Partial Full", "Partial Differential")] [string]$Type = "Full", [string[]]$DeviceType, [switch]$EnableException ) process { foreach ($instance in $SqlInstance) { try { $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential } catch { Stop-Function -Message "Error occurred while establishing connection to $instance" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } if ($Database) { $DatabaseCollection = $server.Databases | Where-Object Name -in $Database } else { $DatabaseCollection = $server.Databases } if ($ExcludeDatabase) { $DatabaseCollection = $DatabaseCollection | Where-Object Name -NotIn $ExcludeDatabase } foreach ($db in $DatabaseCollection) { Write-Message -Level VeryVerbose -Message "Retrieving history for $db." $allHistory = @() # Splatting didn't work if ($Since) { $histories = Get-DbaDbBackupHistory -SqlInstance $server -Database $db.name -Since $Since -DeviceType $DeviceType -Type $Type } else { $histories = Get-DbaDbBackupHistory -SqlInstance $server -Database $db.name -Last:$Last -DeviceType $DeviceType -Type $Type } foreach ($history in $histories) { $timeTaken = New-TimeSpan -Start $history.Start -End $history.End if ($timeTaken.TotalMilliseconds -eq 0) { $throughput = $history.TotalSize.Megabyte } else { $throughput = $history.TotalSize.Megabyte / $timeTaken.TotalSeconds } Add-Member -Force -InputObject $history -MemberType NoteProperty -Name MBps -value $throughput $allHistory += $history | Select-Object ComputerName, InstanceName, SqlInstance, Database, MBps, TotalSize, Start, End } Write-Message -Level VeryVerbose -Message "Calculating averages for $db." foreach ($db in ($allHistory | Sort-Object Database | Group-Object Database)) { $measureMb = $db.Group.MBps | Measure-Object -Average -Minimum -Maximum $measureStart = $db.Group.Start | Measure-Object -Minimum $measureEnd = $db.Group.End | Measure-Object -Maximum $measureSize = $db.Group.TotalSize.Megabyte | Measure-Object -Average $avgDuration = $db.Group | ForEach-Object { New-TimeSpan -Start $_.Start -End $_.End } | Measure-Object -Average TotalSeconds [PSCustomObject]@{ ComputerName = $db.Group.ComputerName | Select-Object -First 1 InstanceName = $db.Group.InstanceName | Select-Object -First 1 SqlInstance = $db.Group.SqlInstance | Select-Object -First 1 Database = $db.Name AvgThroughput = [DbaSize]([System.Math]::Round($measureMb.Average, 2) * 1024 * 1024) AvgSize = [DbaSize]([System.Math]::Round($measureSize.Average, 2) * 1024 * 1024) AvgDuration = [DbaTimeSpan](New-TimeSpan -Seconds $avgDuration.Average) MinThroughput = [DbaSize]([System.Math]::Round($measureMb.Minimum, 2) * 1024 * 1024) MaxThroughput = [DbaSize]([System.Math]::Round($measureMb.Maximum, 2) * 1024 * 1024) MinBackupDate = [DbaDateTime]$measureStart.Minimum MaxBackupDate = [DbaDateTime]$measureEnd.Maximum BackupCount = $db.Count } } } } } } |