VPork 是一个用来对分布式哈希表(NoSQL) 进行负载测试的工具。

• A single JVM is started, with any number of client threads
• Each thread executes for a given number of iterations
• For each iteration, the thread can read an existing record, and/or create a new one
• The probability of each read/write is configurable
• The location of where reads happen is configurable (by default, it reads the most recently written records, trailing off to less frequent reads of writes which occurred long ago)

示例测试结果：

Mar 31, 2009 6:21:17 PM - Writes:  Mar 31, 2009 6:21:17 PM -   Num Writes:           159855  Mar 31, 2009 6:21:17 PM -   Write Failures:       0  Mar 31, 2009 6:21:17 PM -   Write Latency:        85.94 ms  Mar 31, 2009 6:21:19 PM -   Write Latency (%99):  319.00 ms  Mar 31, 2009 6:21:19 PM -   Bytes Written:        3658.79 MB  Mar 31, 2009 6:21:19 PM -   Thread w/Throughput:  0.27 KB / ms  Mar 31, 2009 6:21:19 PM -   Total w/Throughput:   24.29 KB / ms  Mar 31, 2009 6:21:19 PM -   Mar 31, 2009 6:21:19 PM - Reads:  Mar 31, 2009 6:21:19 PM -   Num Read:             19872  Mar 31, 2009 6:21:19 PM -   Read Failures:        0  Mar 31, 2009 6:21:19 PM -   Read Latency:         70.36 ms  Mar 31, 2009 6:21:19 PM -   Read Latency (%99):   298.00 ms  Mar 31, 2009 6:21:19 PM -   Read Not Found:       12 (%0.06)  Mar 31, 2009 6:21:19 PM -   Bytes Read:           453.94 MB  Mar 31, 2009 6:21:19 PM -   Thread r/Throughput:  0.33 KB / ms  Mar 31, 2009 6:21:19 PM -   Total r/Throughput:   3.01 KB / ms

项目主页：http://www.open-open.com/lib/view/home/1331131221499