In the process of generating some test data for another post, I managed to completely fill my 5.6TB storage space in 5 minutes, all due to 1 simple thing. IOMeter. The long story short is that I had my storage space running the Hyper-V aware deduplication so I could test the performance. At the same time I was running IOMeter on that volume to generate performance statistics for anther post, however what I didn’t realize was that Microsoft was inline deduping the testfile that IOMeter generated, and then was randomly reading / writing from. The result. 2.1TB of chunk store, and all of my VMs going paused critical.
Thankfully I was able to expand the volume a little bit, get my VMs online again, and then run the following commands to get everything back under control.
Start-DedupJob -Volume E: -Type Scrubbing -Priority High -Memory 50
Start-DedupJob -Volume E: -Type GarbageCollection -Priority High -Memory 50
The Scrubbing job verifies the Chunks, and the GarbageCollection deletes the chunks that are no longer needed.
This process will take a few hours and is pretty I/O intensive on the disk, but it is the only safe way to properly clear that store without destroying your existing data.
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In the process of generating some test data for another post, I managed to completely fill my 5.6TB storage space in 5 minutes, all due to 1 simple thing. IOMeter. The long story short is that I had my storage space running the Hyper-V aware deduplication so I could test the performance. At the same time I was running IOMeter on that volume to generate performance statistics for anther post, however what I didn’t realize was that Microsoft was inline deduping the testfile that IOMeter generated, and then was randomly reading / writing from. The result. 2.1TB of chunk store, and all of my VMs going paused critical.
Thankfully I was able to expand the volume a little bit, get my VMs online again, and then run the following commands to get everything back under control.
The Scrubbing job verifies the Chunks, and the GarbageCollection deletes the chunks that are no longer needed.
This process will take a few hours and is pretty I/O intensive on the disk, but it is the only safe way to properly clear that store without destroying your existing data.
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