背景

背景不在说了 申威服务器..

结论

天坑
做了raid写入性能下降明显. 
充分怀疑驱动不行. 

四快盘的raid5 跟单盘的读几乎没区别. 
感觉这个设置太失败了. 
总体的结果为:
读的情况合计都为 70k
但是写入的情况  RAID卡不足30K的IOPS
单盘可以达到 66k.  

另外也加急验证了一把sysbench: 
单盘比raid卡要好.

读的测试结果

写的测试结果

sysbench的测试结果

性能测试-单盘SSD验证

write128k
  write: IOPS=2586, BW=323MiB/s (339MB/s)(4096MiB/12669msec)
read128k
   read: IOPS=3914, BW=489MiB/s (513MB/s)(4096MiB/8371msec)
randwrite128k
  write: IOPS=2670, BW=334MiB/s (350MB/s)(4096MiB/12272msec)
randread128k
   read: IOPS=2768, BW=346MiB/s (363MB/s)(4096MiB/11835msec)
write16k
  write: IOPS=8607, BW=134MiB/s (141MB/s)(4035MiB/30001msec)
read16k
   read: IOPS=13.6k, BW=213MiB/s (223MB/s)(4096MiB/19265msec)
randwrite16k
  write: IOPS=8623, BW=135MiB/s (141MB/s)(4042MiB/30001msec)
randread16k
   read: IOPS=6272, BW=98.0MiB/s (103MB/s)(2940MiB/30001msec)
write8k
  write: IOPS=10.5k, BW=81.0MiB/s (85.0MB/s)(2460MiB/30001msec)
read8k
   read: IOPS=14.6k, BW=114MiB/s (119MB/s)(3414MiB/30001msec)
randwrite8k
  write: IOPS=10.1k, BW=78.9MiB/s (82.7MB/s)(2366MiB/30001msec)
randread8k
   read: IOPS=7411, BW=57.9MiB/s (60.7MB/s)(1737MiB/30001msec)
write1k
  write: IOPS=11.9k, BW=11.6MiB/s (12.1MB/s)(348MiB/30001msec)
read1k
   read: IOPS=14.4k, BW=14.1MiB/s (14.8MB/s)(423MiB/30001msec)
randwrite1k
  write: IOPS=11.2k, BW=10.9MiB/s (11.4MB/s)(327MiB/30001msec)
randread1k
   read: IOPS=8366, BW=8366KiB/s (8567kB/s)(245MiB/30001msec)

性能测试-四SSD 9361 8i Raid5验证

write128k
  write: IOPS=1530, BW=191MiB/s (201MB/s)(4096MiB/21414msec)
read128k
   read: IOPS=8801, BW=1100MiB/s (1154MB/s)(4096MiB/3723msec)
randwrite128k
  write: IOPS=1172, BW=147MiB/s (154MB/s)(4096MiB/27944msec)
randread128k
   read: IOPS=2575, BW=322MiB/s (338MB/s)(4096MiB/12725msec)
write16k
  write: IOPS=3528, BW=55.1MiB/s (57.8MB/s)(1654MiB/30001msec)
read16k
   read: IOPS=13.8k, BW=215MiB/s (225MB/s)(4096MiB/19056msec)
randwrite16k
  write: IOPS=2991, BW=46.7MiB/s (49.0MB/s)(1402MiB/30001msec)
randread16k
   read: IOPS=5331, BW=83.3MiB/s (87.4MB/s)(2499MiB/30001msec)
write8k
  write: IOPS=4413, BW=34.5MiB/s (36.2MB/s)(1034MiB/30001msec)
read8k
   read: IOPS=13.3k, BW=104MiB/s (109MB/s)(3124MiB/30001msec)
randwrite8k
  write: IOPS=3729, BW=29.1MiB/s (30.6MB/s)(874MiB/30001msec)
randread8k
   read: IOPS=6556, BW=51.2MiB/s (53.7MB/s)(1537MiB/30001msec)
write1k
  write: IOPS=5692, BW=5692KiB/s (5829kB/s)(167MiB/30001msec)
read1k
   read: IOPS=14.4k, BW=14.1MiB/s (14.8MB/s)(423MiB/30001msec)
randwrite1k
  write: IOPS=4189, BW=4189KiB/s (4290kB/s)(123MiB/30001msec)
randread1k
   read: IOPS=7425, BW=7426KiB/s (7604kB/s)(218MiB/30001msec)

单盘SSD的sysbench

SQL statistics:
    queries performed:
        read:                            936796
        write:                           267656
        other:                           133828
        total:                           1338280
    transactions:                        66914  (1114.91 per sec.)
    queries:                             1338280 (22298.23 per sec.)
    ignored errors:                      0      (0.00 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          60.0116s
    total number of events:              66914

Latency (ms):
         min:                                    7.76
         avg:                                    8.96
         max:                                  160.74
         99th percentile:                       14.21
         sum:                               599690.88

Threads fairness:
    events (avg/stddev):           6691.4000/68.50
    execution time (avg/stddev):   59.9691/0.00

Raid卡 四块SSD的 sysbench

SQL statistics:
    queries performed:
        read:                            1748964
        write:                           499698
        other:                           249854
        total:                           2498516
    transactions:                        124924 (1040.88 per sec.)
    queries:                             2498516 (20817.94 per sec.)
    ignored errors:                      2      (0.02 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          120.0118s
    total number of events:              124924

Latency (ms):
         min:                                    8.02
         avg:                                    9.60
         max:                                  176.96
         99th percentile:                       19.29
         sum:                              1199283.15

Threads fairness:
    events (avg/stddev):           12492.4000/82.12
    execution time (avg/stddev):   119.9283/0.00