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Related Best Practices
How to implement snapshots
It can take up to 12 hours or more to process a full backup job and move the entire backup volume to tape or disk. For many companies, that's just too much time. IT departments can use snapshots to capture entire storage environments, or simply track changes to the state of mission-critical systems. Snapshots can establish recovery points in just a fraction of the time...
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How to implement disk-to-disk backups
as well as simple file copies. For example, backup software can send a full backup volume to a virtual tape library (VTL) emulating the behaviors of a traditional tape system. But disk platforms don't just emulate tape. Files can just as easily be copied to a disk array in the same data center or located on the other side of the world. Storage administrators can then recover...
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How to improve tape backup performance and reliability
The role of tape is clearly changing, shifting away from everyday data backup and moving toward deep archiving or offsite storage, but tape is still an important element of many data centers. Storage professionals must contend with concerns about tape performance and...
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FAQ's
What type of data reduction ratios should you realistically expect using deduplication?
with backup; backup appliances performing deduplication or even virtual tape libraries (VTL). So, looking at it in that context, you'll hear advertised ratios of anywhere from 10 to 500X.
But, realistically, I think it's safe to assume a ratio of anywhere between 13 to 17X. You'll probably see lower ratios on target... More...
Data deduplication FAQ
on the host
>>Data deduplication benefits >>Target data deduplication on a virtual tape library (VTL) >>Scalability issues >>Growth issues >>Data loss from hash collisions What type of data reduction ratios should you realistically expect using deduplication? There are two ways you can look at it. Most people are looking at data
Are there any major drawbacks to using tape encryption?
order to work. If you start encrypting your data at the source to put it on tape, that will completely destroy your ability to apply deduplication. So that is something worth considering. You can not have both.
If you are encrypting at the device level, it takes care of that problem, but then you are not... More... |