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Data that is all unique is not going to benefit from deduplication. That is, the amount of deduplication that you are going to get out of a particular data set depends on what is in the data set. Deduplication folder backup exec windows#(NOTE: The Agent for VMWare Virtual Machines and the Agent for Microsoft Hyper-V licenses allow for unlimited usage of the Agent for Windows Systems within the same host machine.)Įxpectations for the Deduplication Optionĭeduplication is data-dependent. Doing so allows the deduplication option to read each of the files and folders within the virtual machine and deduplicate For example, when backing up VMWare or Hyper-V virtual machines, significantly better deduplication rates will be achieved by ensuring the Backup Exec Agent for Windows Systems is installed in each of the virtual machines and backing those machines up as though they are physical machines. The good news is that in these cases, some Backup Exec agents can avoid backing up duplicate data with the use of traditional differential and incremental backup techniques. Because of this, adding data early in the data stream causes the rest of the data stream to deduplicate poorly, if at all (Example: Exchange Database maintenance). These backups appear as one very large stream to the deduplication storage folder. ![]() This segment shift works against the Deduplication Option in cases where a non-file system backup is sent to the deduplication storage folder. For example, when a new bit of data is inserted at the beginning of a large file (VMDKs), the blocks of data are shifted so that none of them will match. Where Other Backup Exec Options Work Bestĭeduplication does not work well if data changes frequently or if the Deduplication Option cannot detect the duplicated blocks of data. ? Where the percentage of data that changes is small ? Where the same file is backed up multiple times ? With Windows and Linux file system data They are the same across multiple systems and do not change often.ĭeduplication works well in the following scenarios: Where the Backup Exec Deduplication Option Works Bestĭeduplication only happens when the Deduplication Option detects blocks of data that are in fact the same. So, if you back up the same unchanged file over and over again, it is stored only one time in the deduplication storage folder. ![]() Data is not stored again when a backup encounters a segment that is already stored in the deduplication storage folder. Deduplication folder backup exec full#More should clear up after the next full backup.Deduplication works by dividing data into 128K segments and then storing the segments in a deduplication storage folder, along with a database that tracks the segments. Deduplication folder backup exec free#I was at 4GB free on the QNAP before the clean-up. Once the process completes you will see that space has been freed on your storage media. ![]() Removing a large amount of old data can easily take an hour or two so be prepared. The process can be quite lengthy as data is being deleted from storage media (like the QNAP) as well as catalogues are being pruned of references to the datasets. The process will repeat as BackupExec rolls through the backup sets you have selected, possibly prompting again for your input on deletion. The green progress bar will appear at some point and slowly update, be patient. I want the data deleted so click Delete this set and all dependent backup sets … Right-click the select Delete … then start answering questions …ĭepending on what is in the backup set you want to delete you may get prompted as follows: Scroll down to the bottom then highlight the items you want to delete … To force the clean-up of old, expired data you need to do the following (all of this is predicated on BackupExec 2012, older versions may operate differently).Ĭlick in to it then into the Backup Sets … BackupExec will NOT delete old data sets, even if they are expired, if more recent full backups have not been successful nor will it let you overwrite those media sets. ![]() The biggest cause of this kind of problem is inconsistent results with full backups. The end result is you can run out of space on your media even though your jobs are set to “overwrite” older media. Backup Exec is supposed to clear (prune) expired data on a regular basis but the process can mess up more often than not. ![]()
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