* feat: sstable
* fix: add magic number version
* feat: new mem kv store based sstable
* feat: binary_search
* fix: sstable iter scan
* fix: new mem kv
* feat: add cache for sstable
* fix: encode schema comment
* fix: sstable iter scan
* chore: clean
* fix: export all
* fix: sstable scan bound
* fix: sstable iter scan next==prev
* fix: merge iter next_back
* fix: mem kv export
* chore: clean
* fix: prev to key
* fix: prev find block
* fix: get prev block idx
* refactor: kv store
* fix: checksum when import
* fix: meta first last key
* Revert "fix: meta first last key"
This reverts commit a069c1ed37.
* fix: skip empty iter
* fix: remove key from large block
* chore: comment
* feat: compress block
* fix: remove key in large block
* chore: const
* doc: intro sstable encode
* test: add kv store fuzz
* style: format file
* feat: add fuzz to kv store (#428)
* fix: kv fuzzer
* fix: debug
* bk
* fix: block iter next back
* fix: block prev iter left = next idx
* feat: move kv store a crate
* fix: remove value len from normal block
* doc: sstable format
* test: add more test
* test: add test
* feat: new merge iter
* chore: revert
* fix: rename next back
* fix: rename mem sstable
* fix: rename to mem
* fix: use Bytes as key
* fix: use simple merge iter
* feat: compress option
* fix: remove empty iter
* style: refine some impl details
* fix: large block compress
* feat: use write read for encode
* doc: refine doc
* fix: simplify the first chunk
* feat: import many times
* refactor: refine styles
* test: fuzz merge iter
* fix: rename peek_xxx()
* fix: better sstable iter inner
* fix: use mem kv store
* pref: mem kv store
* perf: export mem kv
* chore: clean
---------
Co-authored-by: Zixuan Chen <remch183@outlook.com>
* refactor: use kv in state
* refactor: do not load the state into the inner fxhashmap if not needed
* refactor: calc offset without unsafe code
* style: replace unsafe code
