Expand description
This crate is a Rust implementation of the Segcache storage layer.
It is a high-throughput and memory-efficient key-value store with eager expiration. Segcache uses a segment-structured design that stores data in fixed-size segments, grouping objects with nearby expiration time into the same segment, and lifting most per-object metadata into the shared segment header. This reduces object metadata by 88% compared to Memcached.
A blog post about the overall design can be found here: https://pelikan.io/2021/segcache.html
Goals:
- high-throughput item storage
- eager expiration of items
- low metadata overhead
Non-goals:
- not designed for concurrent access
Structs
- A builder that is used to construct a new
Segcacheinstance. - Items are the base unit of data stored within the cache.
- A pre-allocated key-value store with eager expiration. It uses a segment-structured design that stores data in fixed-size segments, grouping objects with nearby expiration time into the same segment, and lifting most per-object metadata into the shared segment header.
Enums
- Policies define the eviction strategy to be used. All eviction strategies exclude segments which are currently accepting new items.
- Possible errors returned by the top-level API