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是否开启raid卡缓存的影响

时间:2023-02-20 18:03:16浏览次数:56  
标签:缓存 raid read MiB 4096MiB 开启 IOPS write BW

开启raid卡缓存 Write back 对IO性能的影响


背景

公司买了一台服务器. 想进行一下升级
但是因为管理员担心数据丢失, 使用了write through + (raid6 + hotspare)
的终极保护模式. 
但是发现磁盘的IO比较差, 测试结果也不是非常好.
基于此进行了一下raid卡的设置, 希望能够提高一下性能. 

调优背景

计划打开raid卡缓存前后进行一下简要的性能测试:
工具为: fio 
还有数据库测试软件: sysbench

对比结果

IO块大小 是否开启RAID缓存 顺序写入 顺序读取 随机写入 随机读取
128KB 10100 5098 910 266
128KB 272 11500 117 1103
16KB 33200 28300 1902 363
16KB 591 22900 137 959
8KB 36500 33700 1863 390
8KB 837 37800 173 946
1KB 39500 36300 837 358
1KB 700 33900 115 884

数据库部分的差异

是否开启超线程 事务效率(每秒) 查询效率(每秒) 最小响应时间(ms) 平均响应时间 99%的响应时间
直写 32核心/32线程 244.78 5011.98 14.43 40.82 97.55
写回 32核心/32线程 497.56 10012.29 14.19 20.09 27.17

图形展示

  • FIO

image

  • sysbench

image


部分原始数据

  • FIO 写回
write128k
   write: IOPS=10.1k, BW=1258MiB/s (1319MB/s)(4096MiB/3257msec)
read128k
   read: IOPS=5098, BW=637MiB/s (668MB/s)(4096MiB/6427msec)
randwrite128k
  write: IOPS=910, BW=114MiB/s (119MB/s)(3420MiB/30065msec)
randread128k
   read: IOPS=266, BW=33.4MiB/s (34.0MB/s)(1001MiB/30006msec)
write16k
  write: IOPS=33.2k, BW=519MiB/s (544MB/s)(4096MiB/7896msec)
read16k
   read: IOPS=28.3k, BW=442MiB/s (464MB/s)(4096MiB/9265msec)
randwrite16k
  write: IOPS=1902, BW=29.7MiB/s (31.2MB/s)(893MiB/30026msec)
randread16k
   read: IOPS=363, BW=5814KiB/s (5953kB/s)(170MiB/30003msec)
write8k
  write: IOPS=36.5k, BW=285MiB/s (299MB/s)(4096MiB/14369msec)
read8k
   read: IOPS=33.7k, BW=264MiB/s (276MB/s)(4096MiB/15542msec)
randwrite8k
  write: IOPS=1863, BW=14.6MiB/s (15.3MB/s)(437MiB/30001msec)
randread8k
   read: IOPS=390, BW=3128KiB/s (3203kB/s)(91.7MiB/30006msec)
write1k
  write: IOPS=39.5k, BW=38.5MiB/s (40.4MB/s)(1156MiB/30001msec)
read1k
   read: IOPS=36.3k, BW=35.5MiB/s (37.2MB/s)(1064MiB/30001msec)
randwrite1k
  write: IOPS=837, BW=838KiB/s (858kB/s)(24.5MiB/30013msec)
randread1k
   read: IOPS=358, BW=358KiB/s (367kB/s)(10.5MiB/30002msec)

  • FIO 直写
write128k
   write: IOPS=272, BW=34.1MiB/s (35.8MB/s)(1023MiB/30002msec)
read128k
   read: IOPS=11.5k, BW=1442MiB/s (1512MB/s)(4096MiB/2841msec)
randwrite128k
  write: IOPS=117, BW=14.7MiB/s (15.4MB/s)(441MiB/30008msec)
randread128k
   read: IOPS=1103, BW=138MiB/s (145MB/s)(4096MiB/29697msec)
write16k
  write: IOPS=591, BW=9456KiB/s (9683kB/s)(277MiB/30005msec)
read16k
   read: IOPS=22.9k, BW=358MiB/s (375MB/s)(4096MiB/11442msec)
randwrite16k
  write: IOPS=137, BW=2202KiB/s (2255kB/s)(64.5MiB/30013msec)
randread16k
   read: IOPS=959, BW=14.0MiB/s (15.7MB/s)(450MiB/30011msec)
write8k
  write: IOPS=837, BW=6700KiB/s (6861kB/s)(196MiB/30001msec)
read8k
   read: IOPS=37.8k, BW=295MiB/s (310MB/s)(4096MiB/13862msec)
randwrite8k
  write: IOPS=143, BW=1144KiB/s (1172kB/s)(33.5MiB/30001msec)
randread8k
   read: IOPS=946, BW=7569KiB/s (7750kB/s)(222MiB/30001msec)
write1k
  write: IOPS=700, BW=700KiB/s (717kB/s)(20.5MiB/30003msec)
read1k
   read: IOPS=33.9k, BW=33.1MiB/s (34.8MB/s)(995MiB/30001msec)
randwrite1k
  write: IOPS=115, BW=116KiB/s (118kB/s)(3471KiB/30005msec)
randread1k
   read: IOPS=884, BW=885KiB/s (906kB/s)(25.9MiB/30005msec)

sysbench的结果

  • 写回
[ 10s ] thds: 10 tps: 493.60 qps: 9952.25 (r/w/o: 6974.03/1975.31/1002.90) lat (ms,99%): 34.33 err/s: 3.70 reconn/s: 0.00
[ 20s ] thds: 10 tps: 451.21 qps: 9067.76 (r/w/o: 6349.91/1804.43/913.42) lat (ms,99%): 26.68 err/s: 2.80 reconn/s: 0.00
[ 30s ] thds: 10 tps: 547.70 qps: 11024.03 (r/w/o: 7723.12/2189.41/1111.50) lat (ms,99%): 25.28 err/s: 3.70 reconn/s: 0.00
SQL statistics:
    queries performed:
        read:                            210532
        write:                           59728
        other:                           30291
        total:                           300551
    transactions:                        14936  (497.56 per sec.)
    queries:                             300551 (10012.29 per sec.)
    ignored errors:                      102    (3.40 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          30.0166s
    total number of events:              14936

Latency (ms):
         min:                                   14.19
         avg:                                   20.09
         max:                                 1041.03
         99th percentile:                       27.17
         sum:                               300053.39

Threads fairness:
    events (avg/stddev):           1493.6000/82.27
    execution time (avg/stddev):   30.0053/0.01

  • 直写
[ 10s ] thds: 10 tps: 243.35 qps: 4991.08 (r/w/o: 3504.25/972.02/514.80) lat (ms,99%): 82.96 err/s: 6.10 reconn/s: 0.00
[ 20s ] thds: 10 tps: 288.50 qps: 5892.27 (r/w/o: 4134.45/1152.11/605.71) lat (ms,99%): 68.05 err/s: 6.90 reconn/s: 0.00
[ 30s ] thds: 10 tps: 202.30 qps: 4163.91 (r/w/o: 2923.90/814.10/425.90) lat (ms,99%): 893.56 err/s: 6.50 reconn/s: 0.00
SQL statistics:
    queries performed:
        read:                            105658
        write:                           29400
        other:                           15475
        total:                           150533
    transactions:                        7352   (244.78 per sec.)
    queries:                             150533 (5011.98 per sec.)
    ignored errors:                      195    (6.49 per sec.)
    reconnects:                          0      (0.00 per sec.)

General statistics:
    total time:                          30.0331s
    total number of events:              7352

Latency (ms):
         min:                                   14.43
         avg:                                   40.82
         max:                                 2938.61
         99th percentile:                       97.55
         sum:                               300120.33

Threads fairness:
    events (avg/stddev):           735.2000/39.34
    execution time (avg/stddev):   30.0120/0.01

标签:缓存,raid,read,MiB,4096MiB,开启,IOPS,write,BW
From: https://www.cnblogs.com/jinanxiaolaohu/p/17138387.html

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