KVM下raw和qcow2格式磁盘文件IO测试

1. Host OS 环境

• CPU: Intel Xeon E5620 2.40GHz
• MEM: 16GB
• DISK: 500GB SATA
• OS: CentOS5.7 64bit

2. Guest OS 环境

• CPU: 2 core
• MEM: 8GB
• DISK: 50GB raw/qcow2 virtio
• OS: Ubuntu 10.04.3 Server 64bit

3. 测试工具

Bonnie++ 1.96

测试命令：bonnie -b -u root -d /root/tmpfile/

4. 测试结果

Host OS

Version  1.96       ------Sequential Output------ --Sequential Input- --Random-
Concurrency   1     -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
jsjcloud20   32088M   763  97 61169  13 34234   6  1541  78 110327   7 284.7  11
Latency             39625us    7351ms    3251ms   24187us     102ms     190ms

Version  1.96       ------Sequential Create------ --------Random Create--------
jsjcloud20          -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16    56   0 +++++ +++    57   0    57   0 +++++ +++    57   0
Latency              1016ms     895us     258ms     233ms      15us     233ms

Guest OS : raw virtio

Version  1.96       ------Sequential Output------ --Sequential Input- --Random-
Concurrency   1     -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
hadoop1         16G   739  96  28405  7 18972   5  3841  96 83858  13 188.9  12
Latency             13992us     873ms   6533ms    18113us   93496ms     291ms

Version  1.96       ------Sequential Create------ --------Random Create--------
hadoop1             -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16    38   0 +++++ +++    53   0    38   0 +++++ +++    53   0
Latency               358ms     815us    1683ms     192ms    2205us    1733ms

Guest OS : qcow2 virtio

Version  1.96       ------Sequential Output------ --Sequential Input- --Random-
Concurrency   1     -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
hadoop2         16G   599  89  2601   1 11303   6  3168  94 45889   7 156.6 2191
Latency             18105us   20413ms    8228ms   61058us     144ms     316ms

Version  1.96       ------Sequential Create------ --------Random Create--------
hadoop2             -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16    37   0 +++++ +++    49   0    37   0 +++++ +++    53   0
Latency               338ms     743us    1797ms     421ms    2768us    1329ms

综合