FAQ: Backup data reduction services for SMEs -
In this Q & A reprinted with permission of BridgeSTOR, get answers to frequently asked questions might your customers ask about the data reduction backup services.
1. Whether to use deduplication, compression, or both?
Both. Deduplication and compression work independently and complementary technologies that together can provide data reduction of up to 90 percent. Used alone or can be effective in reducing backup disk capacity requirements, but a comprehensive strategy for data reduction includes both deduplication and compression. If you get 2: 1 compression of backup data that has already been deduplicated by a ratio of 10: 1, the result is an overall rate of data reduction of 20: 1.
2. What is the best - based on material or data reduction based on software?
There are reasons for your customers to consider both, but compression in particular requires processing power, so its impact on backup performance least when deployed in as a hardware solution. devices based on the data reduction equipment also offer the advantage of pre-configured applications compatible, rather than a piecemeal collection of products that your customers must purchase, install, configure and manage themselves. Look for data reduction devices that do not require a separate backup server, which adds complexity and increases the overall cost of the backup infrastructure. An all-in-one backup data reduction appliance takes the guesswork out of implementing multiple solutions.
3. Tape backup systems include compression; why can not we use hardware compression on my disk backup system?
disk compression was traditionally based on files. Hardware compression works on data blocks, not files. Until recently, the challenges of implementing the compression of block-based data on the disc have been insurmountable. This is changing with the introduction of appliances backup data reduction with disc compression hardware-based.
4. What about backups of remote servers, or backups that are sent off-site for disaster recovery?
reduction of backup data should handle the backup server at the headquarters and remote offices, and sending backup data to a disaster recovery (DR) site. Backup should be one continuous process, centrally managed and easy way, which is possible with data reduction devices.
5. the same data reduction unit for the backup data can be used for primary data?
Typically, deduplication and compression are applied to primary data in very different ways. The primary storage deduplication operates on data blocks aligned with the boundaries of the disc. Windows file systems and Linux align the beginning of each file at the beginning of a block. This means that the primary storage deduplication will always identify duplicate blocks in the file. In addition, the database to read and write on a fixed page size, so that duplicate data in a single database or the database can be detected. Backup applications, on the other hand, create files that are the equivalent of .tar or .zip in which the blocks are not always aligned in the same way, applications deduplication to backup have a job very different to do deduplication of primary data.
6. Why data reduction solutions vary greatly in price?
Just on price will not provide a true assessment of apples to apples. A better measure is the cost per terabyte of backup to disk capacity. How many simultaneous backup streams are supported? What is the impact on backup performance, if any? Wrong answers to these questions will actually cost your customers more, even to the point of entry lower prices.
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