| - Shifted dedup-able data. |
| Allow for dedup buffer generation to shift contents by random number |
| of sectors (fill the gaps with uncompressible data). Some storage |
| subsystems modernized the deduplication detection algorithms to look |
| for shifted data as well. For example, some databases push a timestamp |
| on the prefix of written blocks, which makes the underlying data |
| dedup-able in different alignment. FIO should be able to simulate such |
| workload. |
| |
| - Generation of similar data (but not exact). |
| A rising trend in enterprise storage systems. |
| Generation of "similar" data means random uncompressible buffers |
| that differ by few(configurable number of) bits from each other. |
| The storage subsystem usually identifies the similar buffers using |
| locality-sensitive hashing or other methods. |
| |
