我们正在运行两台具有相同软件设置但不同硬件的服务器。
第一个是位于普通塔式服务器上 VMWare 上的 VM，具有双核 Xeon、16 GB RAM 和 7200 RPM 驱动器。
第二个是功能强大的全新机架服务器上 XenServer 上的 VM，具有 4 核 Xeon 和共享存储。
我们正在运行 Dynamics AX 2012 和 SQL Server 2008 R2。当我在慢速塔式服务器上向表中插入 15,000 条记录时（作为测试），它需要 13 秒。在快速服务器上则需要 33 秒。我多次重新运行这些测试，结果相同。
我感觉这是一种 IO 瓶颈，所以我在两者上都运行了 SQLIO。
以下是慢速塔式服务器的结果：
C:\Program Files (x86)\SQLIO>test.bat
C:\Program Files (x86)\SQLIO>sqlio -kW -t8 -s120 -o8 -frandom -b8 -BH -LS C:\Tes
tFile.dat
sqlio v1.5.SG
using system counter for latency timings, 14318180 counts per second
8 threads writing for 120 secs to file C:\TestFile.dat
using 8KB random IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
using current size: 5120 MB for file: C:\TestFile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec: 226.97
MBs/sec: 1.77
latency metrics:
Min_Latency(ms): 0
Avg_Latency(ms): 281
Max_Latency(ms): 467
histogram:
ms: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 99
C:\Program Files (x86)\SQLIO>sqlio -kR -t8 -s120 -o8 -frandom -b8 -BH -LS C:\Tes
tFile.dat
sqlio v1.5.SG
using system counter for latency timings, 14318180 counts per second
8 threads reading for 120 secs from file C:\TestFile.dat
using 8KB random IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
using current size: 5120 MB for file: C:\TestFile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec: 91.34
MBs/sec: 0.71
latency metrics:
Min_Latency(ms): 14
Avg_Latency(ms): 699
Max_Latency(ms): 1124
histogram:
ms: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 100
C:\Program Files (x86)\SQLIO>sqlio -kW -t8 -s120 -o8 -fsequential -b64 -BH -LS C
:\TestFile.dat
sqlio v1.5.SG
using system counter for latency timings, 14318180 counts per second
8 threads writing for 120 secs to file C:\TestFile.dat
using 64KB sequential IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
using current size: 5120 MB for file: C:\TestFile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec: 1094.50
MBs/sec: 68.40
latency metrics:
Min_Latency(ms): 0
Avg_Latency(ms): 58
Max_Latency(ms): 467
histogram:
ms: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 100
C:\Program Files (x86)\SQLIO>sqlio -kR -t8 -s120 -o8 -fsequential -b64 -BH -LS C
:\TestFile.dat
sqlio v1.5.SG
using system counter for latency timings, 14318180 counts per second
8 threads reading for 120 secs from file C:\TestFile.dat
using 64KB sequential IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
using current size: 5120 MB for file: C:\TestFile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec: 1155.31
MBs/sec: 72.20
latency metrics:
Min_Latency(ms): 17
Avg_Latency(ms): 55
Max_Latency(ms): 205
histogram:
ms: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 100
以下是快速机架服务器的结果：
C:\Program Files (x86)\SQLIO>test.bat
C:\Program Files (x86)\SQLIO>sqlio -kW -t8 -s120 -o8 -frandom -b8 -BH -LS E:\Tes
tFile.dat
sqlio v1.5.SG
using system counter for latency timings, 62500000 counts per second
8 threads writing for 120 secs to file E:\TestFile.dat
using 8KB random IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
open_file: CreateFile (E:\TestFile.dat for write): The system cannot find the pa
th specified.
exiting
C:\Program Files (x86)\SQLIO>sqlio -kR -t8 -s120 -o8 -frandom -b8 -BH -LS E:\Tes
tFile.dat
sqlio v1.5.SG
using system counter for latency timings, 62500000 counts per second
8 threads reading for 120 secs from file E:\TestFile.dat
using 8KB random IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
open_file: CreateFile (E:\TestFile.dat for read): The system cannot find the pat
h specified.
exiting
C:\Program Files (x86)\SQLIO>sqlio -kW -t8 -s120 -o8 -fsequential -b64 -BH -LS E
:\TestFile.dat
sqlio v1.5.SG
using system counter for latency timings, 62500000 counts per second
8 threads writing for 120 secs to file E:\TestFile.dat
using 64KB sequential IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
open_file: CreateFile (E:\TestFile.dat for write): The system cannot find the pa
th specified.
exiting
C:\Program Files (x86)\SQLIO>sqlio -kR -t8 -s120 -o8 -fsequential -b64 -BH -LS E
:\TestFile.dat
sqlio v1.5.SG
using system counter for latency timings, 62500000 counts per second
8 threads reading for 120 secs from file E:\TestFile.dat
using 64KB sequential IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
open_file: CreateFile (E:\TestFile.dat for read): The system cannot find the pat
h specified.
exiting
C:\Program Files (x86)\SQLIO>test.bat
C:\Program Files (x86)\SQLIO>sqlio -kW -t8 -s120 -o8 -frandom -b8 -BH -LS c:\Tes
tFile.dat
sqlio v1.5.SG
using system counter for latency timings, 62500000 counts per second
8 threads writing for 120 secs to file c:\TestFile.dat
using 8KB random IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
using current size: 5120 MB for file: c:\TestFile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec: 2575.77
MBs/sec: 20.12
latency metrics:
Min_Latency(ms): 1
Avg_Latency(ms): 24
Max_Latency(ms): 655
histogram:
ms: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%: 0 0 0 5 8 9 9 9 8 5 3 1 1 1 1 0 0 0 0 0 0 0 0 0 37
C:\Program Files (x86)\SQLIO>sqlio -kR -t8 -s120 -o8 -frandom -b8 -BH -LS c:\Tes
tFile.dat
sqlio v1.5.SG
using system counter for latency timings, 62500000 counts per second
8 threads reading for 120 secs from file c:\TestFile.dat
using 8KB random IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
using current size: 5120 MB for file: c:\TestFile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec: 1141.39
MBs/sec: 8.91
latency metrics:
Min_Latency(ms): 1
Avg_Latency(ms): 55
Max_Latency(ms): 652
histogram:
ms: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 91
C:\Program Files (x86)\SQLIO>sqlio -kW -t8 -s120 -o8 -fsequential -b64 -BH -LS c
:\TestFile.dat
sqlio v1.5.SG
using system counter for latency timings, 62500000 counts per second
8 threads writing for 120 secs to file c:\TestFile.dat
using 64KB sequential IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
using current size: 5120 MB for file: c:\TestFile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec: 341.37
MBs/sec: 21.33
latency metrics:
Min_Latency(ms): 5
Avg_Latency(ms): 186
Max_Latency(ms): 120037
histogram:
ms: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 100
C:\Program Files (x86)\SQLIO>sqlio -kR -t8 -s120 -o8 -fsequential -b64 -BH -LS c
:\TestFile.dat
sqlio v1.5.SG
using system counter for latency timings, 62500000 counts per second
8 threads reading for 120 secs from file c:\TestFile.dat
using 64KB sequential IOs
enabling multiple I/Os per thread with 8 outstanding
buffering set to use hardware disk cache (but not file cache)
using current size: 5120 MB for file: c:\TestFile.dat
initialization done
CUMULATIVE DATA:
throughput metrics:
IOs/sec: 1024.07
MBs/sec: 64.00
latency metrics:
Min_Latency(ms): 5
Avg_Latency(ms): 61
Max_Latency(ms): 81632
histogram:
ms: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24+
%: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 100
在我看来，四项测试中有三项在机架服务器的合理参数范围内。然而，64 个写入测试难以置信在机架服务器上速度很慢。（在较慢的塔式服务器上为 68 mb/秒，而在机架服务器上为 21 mb/秒）。64k 的读取速度似乎也很慢。
这是否足以说明共享存储存在某种瓶颈？我想知道我是否可以采纳这些证据并说我们需要对此展开调查。
任何帮助都将受到赞赏。
答案1
请使用 Citrix Performance VM 测试您的 xenserver 性能：关联
它将作为虚拟机运行并测试磁盘和网络 IO