MicroKV is a tiny kv engine basd on LSM architecture.

The lib is built using cmake. You can run run.sh to build this repo on Linux.

chmod +x ./run.sh
./run.sh

• Allocator
• Memory Pool
• MemTable
• SkipList
• Cache
• SSTable
• Bloom Filter
• FileWriter / FileReader

The storage system can be divided into following parts from top to down:

When searching for a value, it will find in cache first. The cache has multiple partitions, each of which can set different cache policies. Now it support LRU policy.

If not found in cache, it will search in MemTable. MemTable is based on SkipList. So the time complexity of query, insert and delete operation is $O(logn)$.

The allocator is optimized for small memory allocation. It will request a block of memory in advance and organize it as blocks of different size. When allocating, it will chose a minimum block that can hold and allocate. For more detail, see

The data will be stored in SSTable format on disk, which is friendly for searching. The detailed SSTable format is in:

TODO