weed-fs 压力测试

阅读《Weed-FS/杂草文件系统 小文件存储集群 安装 使用 测试》中提到weedfs的负载压力不是很好，在看过代码后进行了相应测试，未发现负载压力有何问题。

	weedfs master	weedfs volume	操作系统
我	weed_0.45_amd64.deb	weed_0.45_amd64.deb	ubuntu 12.04 64
棋仙博客	weed_0.45_linux_amd64.tar.gz	weed_0.45_linux_386.tar.gz?	未知

可能存在的不同：

对方进行ab测试时未知测试的是amd64的版本还是386版本

对方操作系统版本未知

对方在设置volume时是否设置了readTimeout的值

对方ab测试参数未知

以下为我的测试结果

测试系统Ubuntu 12.04 64

服务器：

云服务器名称：Server2	CPU核数：4核	付费方式：免费试用
拥有磁盘：2个	内存大小：4GB

root@:~/data1# ab -k -c 100 -n 1000 http://localhost:9333/dir/assign
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests

Server Software:
Server Hostname:        localhost
Server Port:            9333

Document Path:          /dir/assign
Document Length:        86 bytes

Concurrency Level:      100
Time taken for tests:   0.044 seconds
Complete requests:      1000
Failed requests:        0
Write errors:           0
Keep-Alive requests:    1000
Total transferred:      224000 bytes
HTML transferred:       86000 bytes
Requests per second:    22826.36 [#/sec] (mean)
Time per request:       4.381 [ms] (mean)
Time per request:       0.044 [ms] (mean, across all concurrent requests)
Transfer rate:          4993.27 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   1.4      0       6
Processing:     0    4   2.1      3      12
Waiting:        0    4   2.1      3      12
Total:          0    4   2.8      3      16

Percentage of the requests served within a certain time (ms)
  50%      3
  66%      5
  75%      5
  80%      5
  90%      9
  95%     10
  98%     12
  99%     13
 100%     16 (longest request)

root:~/data1# ab -k -c 100 -n 10000 http://localhost:9333/dir/assign
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient)
Completed 1000 requests
Completed 2000 requests
Completed 3000 requests
Completed 4000 requests
Completed 5000 requests
Completed 6000 requests
Completed 7000 requests
Completed 8000 requests
Completed 9000 requests
Completed 10000 requests
Finished 10000 requests

Server Software:
Server Hostname:        localhost
Server Port:            9333

Document Path:          /dir/assign
Document Length:        86 bytes

Concurrency Level:      100
Time taken for tests:   0.413 seconds
Complete requests:      10000
Failed requests:        0
Write errors:           0
Keep-Alive requests:    10000
Total transferred:      2240000 bytes
HTML transferred:       860000 bytes
Requests per second:    24185.90 [#/sec] (mean)
Time per request:       4.135 [ms] (mean)
Time per request:       0.041 [ms] (mean, across all concurrent requests)
Transfer rate:          5290.67 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.3      0       4
Processing:     0    4   3.7      3      50
Waiting:        0    4   3.7      3      50
Total:          0    4   3.7      3      50

Percentage of the requests served within a certain time (ms)
  50%      3
  66%      5
  75%      6
  80%      6
  90%      8
  95%     11
  98%     13
  99%     17
 100%     50 (longest request)

root@:~/data1# ab -k -c 100 -n 20000 http://localhost:9333/dir/assign
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient)
Completed 2000 requests
Completed 4000 requests
Completed 6000 requests
Completed 8000 requests
Completed 10000 requests
Completed 12000 requests
Completed 14000 requests
Completed 16000 requests
Completed 18000 requests
Completed 20000 requests
Finished 20000 requests

Server Software:
Server Hostname:        localhost
Server Port:            9333

Document Path:          /dir/assign
Document Length:        86 bytes

Concurrency Level:      100
Time taken for tests:   0.810 seconds
Complete requests:      20000
Failed requests:        0
Write errors:           0
Keep-Alive requests:    20000
Total transferred:      4480000 bytes
HTML transferred:       1720000 bytes
Requests per second:    24679.17 [#/sec] (mean)
Time per request:       4.052 [ms] (mean)
Time per request:       0.041 [ms] (mean, across all concurrent requests)
Transfer rate:          5398.57 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.5      0       7
Processing:     0    4   4.4      3      86
Waiting:        0    4   4.4      3      85
Total:          0    4   4.4      3      86

Percentage of the requests served within a certain time (ms)
  50%      3
  66%      4
  75%      5
  80%      6
  90%      8
  95%     10
  98%     15
  99%     20
 100%     86 (longest request)