Commit | Line | Data |
---|---|---|
0d71aa98 BD |
1 | - Mixed buffers of dedupe-able and compressible data. |
2 | Major usecase in performance benchmarking of storage subsystems. | |
3 | ||
4 | - Shifted dedup-able data. | |
5 | Allow for dedup buffer generation to shift contents by random number | |
6 | of sectors (fill the gaps with uncompressible data). Some storage | |
7 | subsystems modernized the deduplication detection algorithms to look | |
8 | for shifted data as well. For example, some databases push a timestamp | |
9 | on the prefix of written blocks, which makes the underlying data | |
10 | dedup-able in different alignment. FIO should be able to simulate such | |
11 | workload. | |
12 | ||
13 | - Generation of similar data (but not exact). | |
14 | A rising trend in enterprise storage systems. | |
15 | Generation of "similar" data means random uncompressible buffers | |
16 | that differ by few(configurable number of) bits from each other. | |
17 | The storage subsystem usually identifies the similar buffers using | |
18 | locality-sensitive hashing or other methods. | |
19 |