Deduplication – Windows Server 2012
Domo,
Tonight, let’s have a loot about deduplication. Coming with Windows Server 2012, this technologie factorize datas sequences to gain space on NTFS disks (Other tha system disks).
If i may resume, it’s easy to say that’s it’s useless for databases storageor other I/O carnivorous, but for filers, archives or backups it’s perfect, you will massive space !
To start, let’s install the feature
Import-Module ServerManager Add-WindowsFeature -name FS-Data-Deduplication Import-Module Deduplication
And have a look a cmdlets availables
Get-Command -Module Deduplication
Cmdlet to active deduplication isEnable-DedupVolume.
Get-Help Enable-Dedupvolume
The only argument attended is the volume. To list availables volumes use this cmdlet:
Get-Volume
Enable-DedupVolume -Volume E:
Now, deduplication is actived for the E: volume. By default, deduplication jobs are created when you activate it on a volume. You can see them with the following cmdlet.
Get-DedupSchedule
Obviously you can edit or add jobs as you like, remeber cmdlets available with this module 😉
Now deduplication is configured, let’s have a look where deduplication databases are stored, YOU MUST Backup them, if you encounter a crash, you won’t be able to get deduped datas anymore.
Two folders have to be backup :
- “Chunk Store”  stocké dans /System Volume Information/Dedup/ChunkStore*
- “Dedup Configuration” stocké dans /System Volume Information/Dedup/Settings*
More information here:Â http://msdn.microsoft.com/en-us/library/windows/desktop/hh769304(v=vs.85).aspx
To finish with deduplication, let’s launch a manual dedup job.
Start-DedupJob –Volume E: –Type Optimization
You can list jobs like this
Get-DedupJob
And to see deduplication status…
Get-DedupStatus
If you encouter errors during access deduplicated files, you can use the following command to repair errors, Microsoft thinks about everything 😉
Start-Dedupjob -volume E: -Type -Scrubbing -Full
Hope you’ll find use about deduplication !
See ya !
More informationss:
- http://technet.microsoft.com/en-us/library/hh831434.aspx
- http://technet.microsoft.com/fr-fr/library/hh831602.aspx
- http://blogs.technet.com/b/bruce_adamczak/archive/2012/10/19/follow-me-and-learn-windows-server-2012-data-deduplication.aspx