Deduplication can be run as an inline process as the data is being written into the storage system and/or as a background process to eliminate duplicates after the data is written to disk. If you want to know what is being worked on directly, I find looking in Resource Monitor and under disk utilisation, filtering down to the fsdmhost process, this will then show what files are being touched by the dedup process. Data deduplication is a process that eliminates excessive copies of data and significantly decreases storage capacity requirements. With data deduplication enabled, Veeam Backup & Replication does not store to the resulting file identical data blocks and space that has been pre-allocated but not used. Data deduplication decreases the size of files. Check the number of in-policy files with Get-DedupStatus in PowerShell and then wait for the excluded files to fall out of policy and be re-inflated. All subsequent backup files in the backup chain will also use the new compression level. You could also possibly set an exclusion, so name some specific VHDX files in the exclusions. In the same way if you have two separate dedup enabled volumes and you move the VHDX file for a VM between the two, it will be re-inflated in transit and then re-deduped on it’s target volume. My understanding is, because dedup is done on a per volume basis, if you migrated the VM storage to another volume that doesn’t have dedup enabled on it, that will effectively re-inflate the VHDX file, as it no longer lives on a dedup enabled volume. I would guess this is just a bug, but it seems once a volume has been touched by the deduplication processes, it never goes back to a blank value for dedup rate.
I have noticed that several folders/files after the file system restore are not fully inflated as they should be immediately after the restore.
FILE DEDUPLICATION SOFTWARE WINDOWS FULL
When all this is done, the volume will still show in some places like server manager sat at 0% deduplication rate, which is fine, as we’ve turned it off. Windows 2012 with deduplication file restore I recently had to do a full system rebuild (not restore) and did a file system restore of our volume that had the 2012 de-duplication option set. Start-DedupJob -Type GarbageCollection -Volume E: -Fullįinally, after that, the final step is to turn off dedup on the volume with the following command Īnd that should save you any unnecessary drama. Data deduplication software Find duplicate data records even in the absence of unique identifiers and exact data values by leveraging a combination of advanced probabilistic and deterministic algorithms, and identifying fuzzy, phonetic, mis-keyed, and abbreviated variants of data values. Once this is done, the next step is to run the following command to start your garbage collection on the volume Since there’s still the garbage collection job to run, we need to rather counter-intuitively turn dedup back on for the volume with the following command Enable-DedupVolume -Volume E: When that job has completed, which you can check with the Get-DedupJobĬommand, you’ll then find that deduplication has been disabled on the disk. Verify your account to enable IT peers to see that you are a professional. Start-DedupJob -Type Unoptimization -Volume E: -Full File deduplication for Windows Server came after Windows Server 2012 and there is no native feature for Server 2008 R2. So with that in mind the, step two would be to run the following command in PowerShell If you disable dedup on the volume first, you simply stop new data being processed, rather than rehydrating your already deduplicated data. In this example, the volume in question is E:ĭO NOT DISABLE DEDUPLICATION ON THE VOLUME
FILE DEDUPLICATION SOFTWARE WINDOWS HOW TO
I just thought I’d post about this, as it’s something I’ve come up against recently, how to disable deduplication on a volume on Server 2012, 2012 R2 or 2016 and inflate the data back to it’s original form. You can look at this type of thing that is built in to Windows too.Update – : I’ve added a link here to Microsoft’s updated Server 2016 documentation that details deduplication – Understanding Data Deduplication You would have to go out of your way to enable any such ability in Windows 8, and in doing so, probably invalidate several Licensing conditions making your engineered copy of Windows illegal? Of course I am no Lawyer so that might be an error on my part. (Optional) Another computer or virtual machine running Windows Server 2012 R2 or Windows Server 2012 that is connected to the server over a network".Server: One computer or virtual machine running Windows Server 2012 R2 or Windows Server 2012 with at least one data volume.
To take advantage of data deduplication, the environment must meet the following requirements:
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