What is the difference between SSDB and Redis?

SSDB is a NoSQL database developed in C, using Google's open source LevelDB engine as the underlying storage engine. Redis is an in-memory NoSQL database developed in C language. SSDB adopts the New BSD License, a very loose and flexible agreement that supports master-slave replication and load balancing.

SSDB is a hard disk database, while Redis is an in-memory database. There are fundamental differences between the two in storage format and reading and writing methods.

SSDB has the main advantages of Redis - high performance, rich data structures; and has capabilities that Redis does not have - big data storage capabilities. The single-machine storage capacity of SSDB server is 100 times that of Redis! Because SSDB can store data on the hard disk.

In tests using the ssdb-bench tool that comes with SSDB and the redis-benchmark tool that comes with Redis on the same machine, the read performance of SSDB completely exceeded that of Redis; but the write performance of SSDB was still better than Redis is about 10% slower.

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