CouchDB vs. Redis

I installed CouchDB, ZeroMQ in my MacBook Air, with the usages of XCode 5, brew. The following are some helpful articles:

CouchDB，反Redis的产物？－Redis与CouchDB特性对比 Is CouchDB The Anti-Redis? Cassandra、MongoDB、CouchDB、Redis、Riak、HBase比较

CouchDB 的长处正是Redis的短处：存储大量的不易变但会被经常查询的数据。Redis的长处正是CouchDB的短处：存储小量的常变数据。

IndexedDB -> CouchDB localStorage -> Redis Web Workers -> node promises/delay