Data Deduplication Methods

Companies need to explore data deduplication as a means to cut business expenses. One of the dearest areas of a business budget is the area of remote data backup. There are a number of ways that data deduplication can be handled to better operations and lower the price of doing business. Deduplication is carried out in a variety of ways, single instance, block level, and byte-level.

Single instance deduplication is when one file or piece of data is saved if there are duplicates. Backup software package has in the past maintained every file even if it was an identical copy. With single instance deduplication one copy of duplicate file would be saved and all other instances would be preserved as pointers. Cutting down on the number of duplicate files that are maintained can result in significant savings. This kind of deduplication the system files from being backed up that are replicated over the network.

With block level data deduplication the pieces of information are separated into blocks of data and then compared. Depending on the software system the blocks to be analyzed can be 4KB up to about 56KB. More space can be retained when comparing smaller blocks. There are some negatives to block level deduplication since there is an increase in processing necessary and I/O disk overhead when backing up. Some computer programs of this character have configuration settings to align performance to provide for quicker restores.

Byte-level data deduplication functions by comparing the current data with the bytes that it has been seen before. By comparing on the byte level you end up with a very accurate backup. Most of these solutions are content aware which means the computer program is able to identify the file name, file type and date/time stamp. Comparing data byte by byte calls for a lot of time so it is often done post backup. Backups happen speedily because they are stored to disk but extra time and backup storage is required to hold them while it is being processed. Byte-level backup software solution preserves the most current backup as a master. This can considerably enhance restore times.

Software solution providers of remote data backup software system each approach data deduplication differently. Whether you need a single software system or a complete solution you will be able to find what you demand. Remote data backup software is able to solve your most serious backup demands.

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