2011-02-19 09:22:50 
阿炯
Tokyo Cabinet (TC) 是日本第一大SNS网站mixi开发的，而Flare是日本第二大SNS网站green.jp开发的。Flare简单的说就是给TC添加了scale功能，他替换掉了TT部分，自己另外给TC写了网络服务器；Flare的主要特点就是支持scale能力，它在网络服务端之前添加了一个node server，来管理后端的多个服务器节点，因此可以动态添加数据库服务节点，删除服务器节点，也支持failover。如果你的使用场景必须要让TC可以scale，那么可以考虑flare。
Flare只支持memcached协议，因此当你使用flare的时候，就不能使用TC的table数据结构了，只能使用TC的key-value数据结构存储。
Flare is distributed, and persistent key-value storage compatible with memcached, and has more features:
* persistent storage (you can use flare as persistent memcached)
* pluggable storage (currently only Tokyo Cabinet is available, though)
* data replication (synchronous or asynchronous)
* data partitioning (automatically partitioned according to # of master servers (clients do not have to care about it))
* dynamic reconstruction, and partitioning (you can dynamically (I mean, without any service interruption) add slave servers and partition master servers)
* node monitoring and failover (if any server is down, the server is automatically isolated from active servers and another slave server is promoted to master server)
* request proxy (you can always get same result regardless of servers you connect to. so you can think flare servers as one big key-value storage)
* over 256 bytes keys, and over 1M bytes values are available
最新版本：1.0