BACKUP STORAGE BLOCK-LEVEL DEDUPLICATION WITH DDUMBFS AND BACULA

Data deduplication is not only becoming an essential backup system component, because it reduces storage space requirements, but also a critical one, since the performance of all the backup operation depends on storage throughput. This paper is focused on the backup data volume ratio of deduplication when stored in file systems with this feature, and how a newly developed volume format can improve it. Bacula backup software is currently the third most popular backup software worldwide and it’s also open source, therefore selected to this performance analysis study. Corresponding to the results, it is possible to verify that the proposed Bacula aligned backup format brings gains of 82%, even for a workload that emulates a relatively small backup policy and with minimum impact on backup or restore times.