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README.md

#WELCOME TO NVMKV

  1. OVERVIEW
  2. GETTING STARTED WITH NVMKV
  3. NVMKV API REFERENCE
  4. NVMKV SAMPLE CODE
  5. NVMKV MAXIMUM SUPPORTED LIMITS
  6. NVMKV BENCHMARKING UTILITY

1. OVERVIEW

A Key-Value (KV) store is a type of NoSQL database used in high-performance, data-intensive, and scale-out environments. Persistent KV stores today use flash as a block device and are unable to fully leverage powerful capabilities that a Flash Translation Layer (FTL) offers, such as dynamic mapping, transaction persistence, and autoexpiry. Additionally, non-FTL-aware KV stores maintain some of the same metadata that are maintained by the underlying FTL, resulting in wasted memory.

The NVMKV library, as described in the API specification, is a lightweight user space library that provides basic key-value operations such as get, put, delete, and advanced operations such as batch put/get/delete, pools, iterator, and lookup. The library leverages highly-optimized primitives such as sparse addressing, atomic-writes, Persistent TRIM, etc., provided by the underlying FTL. The strong consistency guarantees of the underlying NVM Primitives allow KV to achieve high performance combined with ACID compliance.

2. GETTING STARTED WITH NVMKV

See the 'DIY On-Premises -> NVMKV' section under http://opennvm.github.io/get-started.html

3. NVMKV API REFERENCE

http://opennvm.github.io/nvmkv-documents/

4. NVMKV SAMPLE CODE

https://github.com/opennvm/nvmkv/tree/master/docs/examples/

5. NVMKV MAXIMUM SUPPORTED LIMITS

Maximum number of pools within a store, 1048576 Maximum key size, 128 bytes. Maximum value size, 1 MiB - 1 KiB (1 MiB less 1 KiB). See NOTE below. Maximum number of iterators, 128.

NOTE: NVMKV has been tested with VSL block sizes of 512 Bytes, 1 KiB, 2 KiB, and 4 KiB. If you are using 2 KiB or 4 KiB blocks, then the maximum value size will be 1 MiB - block size.

6. NVMKV BENCHMARKING UTILITY

https://github.com/opennvm/nvmkv/tree/master/test