For years backup-to-disk technologies have evolved toward the ingestion of large sums of data very quickly, especially when compared to the newest tape options. This evolution has made backup applications influence disk targets for equally fast restores, even down to the file level.
Essentially what this means is that, today clients can integrate disk-based back-up solutions to fulfill the following conditions:
[framed_box bgColor=”#F0F0F0″ textColor=”undefined” rounded=”true”] – Mitigate risk of traditional tape failures
– Reduce the amount of time it takes to perform large back-up jobs
– Reduce the amount of capacity required at the back-up target by nearly 10-20X more than tape
– Reduce the amount of data traversing the network during a back-up job (Avamar or similar “source-based” technologies)
– Lower the total cost of ownership in comparison to tape
– Enable clients to automate the “off-site” requirement for tape by the way of replicating one disk system to the next over long distances
– Lower the RTO and RPO for clients based on custom policies available
Data Domain deduplication methods are useless without backup software in place. By leveraging Data Domains OST functionality (DDBoost), we can now combine Data Domain’s deep compression ability with the superior archiving abilities of Avamar.
Through Source-Based Deduplication, Avamar’s host side enables environments with lower bandwidth and longer backup windows to push the backup process much faster. Also, after completing the initial backup, this strategy results in less data on disks, which is good for everyone.
Where Data Domain shines the most is in its ability to compress the then deduplicated data 10X more than Avamar. This integration allows Avamar to cut weekend, month-end and year-end backups to the Data Domain, allowing for much longer retention. This feature expands Avamar’s reach into extended retention cycles to disk, which is one of the faster restore methods.
Data Domain’s “target-based” deduplication technology means the backup/deduplication process happens at the actual DD Appliance. Data Domain is the actual target, as it is here that the deduplication takes place.
All data has to go over the network to the target when leveraging Data Domain. If there is a need to backup 10TBs then 10TBs need to traverse the network to the DD Appliance. When leveraging Avamar, I may only need to send 2TBs over the network, given the fact that data has been deduped prior to pushing to the target.
Taking Data Domain even further, Avamar can replicate backups to another Data Domain off site.
Allowing Avamar to control the replication enables it to keep the catalogues and track the location of the backup. This ability gives the end user ease of management when a request is made to restore. The prerequisites for DDBoost are both the license enabler for DDBoost and the Replicator on Data Domain. Overall this integration of the two “Best Deduplication Appliances” allows the end user a much wider spectrum of performance, use and compliance.
For a deeper dive into deduplication strategies, read the article from IDS CTO Justin Mescher about Data Domain vs EMC Avamar: which deduplication technology is better.