分布式文件系统 SeaweedFS

SeaweedFS 是简单，高伸缩性的分布式文件系统，包含两部分：存储数十亿的文件；快速为文件服务。SeaweedFS 作为支持全 POSIX 文件系统语义替代，Seaweed-FS 选择仅实现 key-file 的映射，类似 "NoSQL"，也可以说是 "NoFS"。

SeaweedFS 仅花费 40 字节的硬盘来存储每个文件的元数据。

基准测试基于 Mac Book，固态硬盘，CPU：1 Intel Core i7 2.6GHz。

编写 1 百万的 1KB 文件：

Concurrency Level:      16
Time taken for tests:   88.796 seconds
Complete requests:      1048576
Failed requests:        0
Total transferred:      1106764659 bytes
Requests per second:    11808.87 [#/sec]
Transfer rate:          12172.05 [Kbytes/sec]

Connection Times (ms)
              min      avg        max      std
Total:        0.2      1.3       44.8      0.9

Percentage of the requests served within a certain time (ms)
   50%      1.1 ms
   66%      1.3 ms
   75%      1.5 ms
   80%      1.7 ms
   90%      2.1 ms
   95%      2.6 ms
   98%      3.7 ms
   99%      4.6 ms
  100%     44.8 ms

自由读取 1 百万文件：

Concurrency Level:      16
Time taken for tests:   34.263 seconds
Complete requests:      1048576
Failed requests:        0
Total transferred:      1106762945 bytes
Requests per second:    30603.34 [#/sec]
Transfer rate:          31544.49 [Kbytes/sec]

Connection Times (ms)
              min      avg        max      std
Total:        0.0      0.5       20.7      0.7

Percentage of the requests served within a certain time (ms)
   50%      0.4 ms
   75%      0.5 ms
   95%      0.6 ms
   98%      0.8 ms
   99%      1.2 ms
  100%     20.7 ms