Various tactics for data compression can decrease the cost of long-term preservation by reducing the amount of storage space required. At the same time, different compression approaches bring with them their own risks. How should one weigh the risks and rewards in the case of the following kinds of compression?
Three types of compression to consider (feel free to suggest others as a comment)
- File compression: using a file compression algorithm suited to the file type. (Considering both lossy or lossless compression)
- Hardware compression: which usually means compression done by a tape drive as the data is written to tape
- Disk compression: which is performed by many new storage appliances and uses a combination of compression and de-duplication