Got confused at the design of SST in LevelDB.
As I known, there are multiple datablocks in a SSTable.
What is the advantages of multiple datablocks.
Thanks.
When you have multiple data block in one .sst file you can compress those blocks and decompressed them on the fly. Keeping the block uncompressed in a dedicated cache is also possible.
If you had one unique data block this would be less efficient (decompression is not free) and would increase cache pressure.