Apache Accumulo vs TiKV

Apache Accumulo is a free, open-source sorted, distributed key/value store for storing and retrieving large datasets across a cluster. It uses Apache Hadoop HDFS for data storage and Apache ZooKeeper for consensus. Each key/value pair can carry a security label, so query results can be restricted according to a user’s authorizations. Accumulo Iterators can modify key/value pairs at different stages of data management. Clusters can use one or more HDFS instances, and nodes can be added or removed as stored data changes. The project says its client API follows Long Term Maintenance releases and semantic versioning, and that each release undergoes extensive testing. The software is licensed under Apache License, Version 2.0. The downloads page lists source and binary archives for versions 4.0.0-alpha-1, 3.0.0, and 2.1.6; the project identifies 4.0.0-alpha-1 as alpha and says alpha or beta releases are not production ready. General questions can go to the user mailing list, while the dev list serves contributor discussions. An interactive tour teaches the Java API through exercises and is designed for Accumulo 2.1.x or greater.

TiKV is a distributed transactional key-value database designed as a unified storage layer across nodes. It provides a raw key-value API and a transactional key-value API with ACID semantics, but those APIs cannot both be used on the same keyspace. The project says it can support petabyte-scale deployments spanning trillions of rows. Raft groups replicate data across nodes for fault tolerance, while horizontal scaling and rebalancing support changes in cluster capacity. RawKV also includes time-to-live expiration and compare-and-swap operations. The documentation lists Java, Go, Rust, Python, and C++ clients; Java and Go are marked stable, while the others are marked unstable. TiKV is self-hosted and Apache 2.0 licensed, with Linux, macOS, Windows, and API listed as platforms. Its documentation describes TLS for network connections and configurable encryption at rest, including AES methods. TiKV was originally created by PingCAP and is a Cloud Native Computing Foundation graduate project. The community page recommends Slack for general communication and provides a dedicated mailing list for security vulnerability reports.