I've been using 2012 dedup for about 6 months now (also using windows storage spaces).
relatively small shop. 24 VMs being backed up in veeam, 14 daily, 10 once a week. (Veeam 6.5, VMware 5.1)
While for many of you this is a tiny shop, for some (even large shops) it may provide some insight, particularly when trying to both keep a lot of restore points, and deal with the 2012 ingest rate issue. Do your backups to a non-dedup volume, and then copy them to the dedup volume for archival. you can continue your forward/reverse incrementals at normal speed, and get your longer term storage at the same time. You do lose the immediate access to the archived jobs from the Veeam GUI, but they are really there for infrequent use anyway. think of them as your old Tape copies. With this process you could even do a G/F/S process in dedup.
Here is my process:
All Veeam backups go to a non-dedup enabled volume on the server. I basically have one job per VM for backup, except for weekend, then the VMs that have minimally changed data are in one job.
I do a full once per week, which ones are done rotate. so VM 1+2 on Monday, 3+4 on tuesday, etc. that splits the volume down for the dedup.
Each day the jobs are finished by midnight. At 1am I kick off a script that does a full robocopy of the non-dedup volume to a external 4TB NAS device. When that finishes, it does a robocopy of the VBK files to the dedup volume, when that finishes it fires off a manual dedup job. (deduce file age=0 - immediate deduplication, disabled built in dedup schedule)
I get an e-mail after each robocopy, and then configured triggered task to e-mail dedup status after dedup jobs complete.
I have also created a script that will remove the archived jobs after they exceed a specified retention period. (haven't removed any yet)
I end up with 1 to 2 weeks (depending on VM) of live backup files - full + forward incremental (duplicated to external NAS) VBK sizes from 3GB up to 280GB. (~1.9TB of VBK files)
Then I have (currently) 6 months of VBK files in the dedup volume. I have expanded the capacity about 3 times in the 6 months. started at 3TB volume. FreeSpace fluctuates a bit. I only need about 400GB free due to staggering the full backups through the week.
Volume : E:
VolumeId : \\?\Volume
Capacity : 6.5 TB
FreeSpace : 607.24 GB
UsedSpace : 5.91 TB
UnoptimizedSize : 53.49 TB
SavedSpace : 47.58 TB
SavingsRate : 88 %
OptimizedFilesCount : 757
OptimizedFilesSize : 53.42 TB
OptimizedFilesSavingsRate : 89 %
InPolicyFilesCount : 757
InPolicyFilesSize : 53.42 TB