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A comparison of storage performance




IBM DS4700   vs.           IBM DS5300             vs.    IBM Storwize V7000
1. Configuration of test data storage systems:

IBM DS4700 1GB RAM per controller              HDD 15K RPM 3.5” (ST3300657FC 146GB)
IBM DS5300 8GB RAM per controller              HDD 15K RPM 3.5” (MBA3147FD 300GB)
IBM Storwize V7000 8GB RAM per controller      HDD 10K RPM 2.5” (Savvio 10K.3 300GB)

                                                       Features HDD, used in the test storage




                                                                                                                   Savvio 10K.3
MBA3147FD                                             ST3300657FC
Average latency time: 2 ms                            Average latency time: 2 ms                                   Average latency time: 3 ms
2-platter                                             2-platter                                                    2-platter
Areal density: 112.8 Gbits/sq. in.                    Areal density (avg) 225Gbits/sq. in.                         Areal density (avg) 252Gbits/sq. in.
Power requirement (ready) 14.8 W                      Average operating power 13.8W                                Average operating power 4.4W

As can be seen from the above table, 10K RPM 2.5 "HDD SFF lose performance 15K RPM 3.5" HDD SFF, but have a substantially lower power consumption. According to
tests of single disks, 15K RPM 3.5 "HDD give up 40% Input / Output operation Per Second (IOPS). But here, in this case, wondering how it will affect the final performance
storage systems, whether we observe the same difference of 40% on iops? Proceed directly to the test.


    2. When comparing the performance of the raid groups R10 used the following configuration:

IBM DS4700             One raid group R10 (8+8)
IBM DS5300             One raid group R10 (8+8)
IBM Storwize V7000     One raid group R10 (8+8)
2.1. Results of testing with a load of 64 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R/W = 80/20 are shown in
    diagr.2.1a. The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 2.1b




                                                                                                                                                          diagram 2.1B
                                                           diagram 2.1A

                                                                                                                                                          R10
                                                               R10
      4000                                                                                           12,0                                                 64 I/O treads
                                                          64 I/O treads
      3500                                                                                                                                                100%Random
                                                          100%Random                                 10,0
      3000                                                                                                                                                R/W=80/20
      2500                                                 R/W=80/20                                   8,0
      2000                                             IBM DS4700 (16x15K 3.5"                         6,0                                                  IBM DS4700
 IOPS                                                                                 latency, ms
       1500                                            HDD)                                                                                                 15K 3.5" HDD
       1000                                                                                            4,0
        500                                                                                            2,0
                                                       IBM DS5300 (16x15K 3.5"                                                                              IBM DS5300
          0
                                                       HDD)                                            0,0                                                  15K 3.5" HDD
                 4K    8K   32K    64K 256K                                                                   4K     8K    32K
                                                       IBM V7000 Storwize                                                          64K    256K              IBM V7000
                                                       (16x10K 2.5" HDD)                                                                                    Storwize 10K
                                                                                                                                                            2.5" HDD
                      block size
2.2. The results of testing at a load of 512 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R / W = 80/20 are shown in
     diagram.2.2a. The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 2.2b.



                                                              diagram 2.2A                                                                                  diagram 2.2B

                                                              R10                                                                                           R10
        6000                                                  512 I/O treads                            14,0                                                512 I/O treads
        5000                                                  100%Random                                12,0                                                100%Random
        4000                                                  R/W=80/20                                 10,0                                                R/W=80/20
         3000                                              IBM DS4700 16x 15K 3.5"                        8,0                                                 IBM DS4700
 IOPS                                                      HDD                            latency, ms     6,0
         2000                                                                                                                                                 15K 3.5" HDD
                                                                                                          4,0
         1000                                              IBM DS5300 16x 15K 3.5"                        2,0                                                 IBM DS5300
             0                                             HDD                                                                                                15K 3.5" HDD
                                                                                                          0,0
                 4K    8K    32K                                                                                4K     8K
                                    64K   256K                                                                                32K                             IBM V7000
                                                           IBM V7000 Storwize 16x                                                    64K    256K              Storwize 10K
                                                           10K 2.5" HDD
                                                                                                                                                              2.5" HDD

                       block size
3. When comparing the performance of the raid groups used the following configuration R5:

IBM DS4700            One raid group R5 (15+1)
IBM DS5300            One raid group R5 (15+1)
IBM Storwize V7000    One raid group R5 (15+1)


   3.1. Results of testing with a load of 64 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R / W = 80/20 are shown in
       diagr.3.1a.
       The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 3.1b.




                                                          diagram 3.1A                                                                                     diagram 3.1B
                                                          R5                                                                                               R5
     3500                                                 64 I/O treads                                                                                    64 I/O treads
                                                                                                     14,0
     3000                                                 100%Random                                                                                       100%Random
                                                                                                      12,0
     2500                                                 R/W=80/20                                                                                        R/W=80/20
                                                                                                      10,0
      2000
                                                                                                       8,0                                                 IBM DS4700
IOPS 1500                                               IBM DS4700 16x 15K 3.5"        latency, ms                                                         15K 3.5" HDD
                                                        HDD                                            6,0
     1000
                                                                                                       4,0
      500                                                                                                                                                  IBM DS5300
        0                                               IBM DS5300 16x 15K 3.5"                         2,0
                                                                                                                                                           15K 3.5" HDD
                                                        HDD                                             0,0
              4K     8K   32K     64K                                                                         4K                                           IBM V7000
                                        256K                                                                         8K     32K
                                                        IBM V7000 Storwize 16x                                                     64K                     Storwize 10K
                                                        10K 2.5" HDD                                                                      256K
                                                                                                                                                           2.5" HDD


                     block size
3.2. The results of testing at a load of 512 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R / W = 80/20 are shown in
        diagr.3.2a.
        The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 3.2b



                                                           diagram 3.2A
                                                                                                                                                           diagram 3.2B
                                                           R5
                                                                                                                                                           R5
     4500                                                  512 I/O treads
                                                                                                         16,0                                              512 I/O treads
     4000                                                  100%Random
     3500                                                                                                14,0                                              100%Random
                                                           R/W=80/20                                     12,0
     3000                                                                                                                                                  R/W=80/20
     2500                                                IBM DS4700 16x 15K 3.5"                         10,0
     2000                                                                                                 8,0                                                IBM DS4700
IOPS                                                     HDD                            latency, ms
      1500                                                                                                6,0                                                15K 3.5" HDD
      1000                                                                                                 4,0
                                                         IBM DS5300 16x 15K 3.5"
       500                                                                                                 2,0                                               IBM DS5300
         0                                               HDD
                                                                                                           0,0                                               15K 3.5" HDD
               4K    8K                                                                                          4K
                           32K    64K                    IBM V7000 Storwize 16x                                         8K    32K
                                        256K                                                                                         64K                     IBM V7000
                                                         10K 2.5" HDD                                                                       256K
                                                                                                                                                             Storwize 10K
                                                                                                                                                             2.5" HDD

                     block size
4. When comparing the performance of the raid groups used the following configuration R6:

IBM DS4700             does not support this type of raid
IBM DS5300             One raid group R6 (14+2)
IBM Storwize V7000     One raid group R6 (14+2)


   4.1. Results of testing with a load of 64 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R / W = 80/20 are shown in
       diagr.4.1a.
       The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 4.1b.




                                                                                                                                                           diagram 4.1B
                                                              diagram 4.1A
                                                                                                                                                           R6
                                                              R6
                                                                                                                                                           64 I/O treads
          3000                                                64 I/O treads
                                                                                                        8,0                                                100%Random
          2500
                                                              100%Random                                7,0                                                R/W=80/20
                                                              R/W=80/20                                 6,0
          2000
                                                                                                        5,0
          1500                                               IBM DS4700 - not support latency, ms       4,0                                                 IBM DS4700 -
   IOPS
          1000                                                                                           3,0                                                not support
           500                                                                                           2,0
                                                             IBM DS5300 16x 15K 3.5"                     1,0                                                IBM DS5300 15K
              0
                                                             HDD                                         0,0                                                3.5" HDD
                  4K     8K                                                                                     4K
                               32K     64K                                                                            8K
                                             256K                                                                            32K    64K    256K             IBM V7000
                                                             IBM V7000 Storwize 16x
                                                                                                                                                            Storwize 10K
                                                             10K 2.5" HDD
                                                                                                                                                            2.5" HDD

                         block size
4.2 Test results at a load of 512 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R / W = 80/20 are shown in diagr.4.2a.
       The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 4.2b.



                                                                                                                                                            diagram 4.2A
                                                            diagram 4.2A
                                                                                                                                                            R6
                                                            R6
                                                                                                                                                            512 I/O treads
      4000                                                  512 I/O treads                             7,0                                                  100%Random
      3500                                                  100%Random
                                                                                                       6,0                                                  R/W=80/20
      3000                                                  R/W=80/20
                                                                                                       5,0
      2500
                                                                                                       4,0                                                  IBM DS4700 15K
      2000                                                  IBM DS4700 16x 15K
 IOPS 1500                                                                             latency, ms     3,0                                                  3.5" HDD
                                                            3.5" HDD
       1000                                                                                             2,0
        500                                                 IBM DS5300 16x 15K                          1,0                                                 IBM DS5300 15K
          0                                                 3.5" HDD                                                                                        3.5" HDD
                                                                                                        0,0
                4K     8K                                                                                     4K
                             32K    64K                     IBM V7000 Storwize 16x                                   8K     32K                             IBM V7000
                                          256K              10K 2.5" HDD                                                           64K    256K              Storwize 10K
                                                                                                                                                            2.5" HDD


                       block size




As seen from these results, the same number of HDD, IBM Storwize V7000 on all types of raids, shows the best result * than the old IBM DS4700

and behind the IBM DS5300 to an average of 5-15% iops, but a third of tests shows with less response time.



* significantly worse outcome in iops and response time for the IBM DS4700 is in a block size of 256KB, presumably due to the lower plate density use HDD
5. It is well known that in the case of R5 and R6 to a raid group Random Write performance is significantly lower than in the case of R10. But in a typical database
       workload, as a rule, the percentage of write operations at times less than the read operations. What will be the difference for the test pattern, simulating the load of a
       typical DBMS? For ease of comparison, we reduce to a single chart (5A) The results of IBM Storwize V7000, and the other (5B) the results of IBM DS5300.

As we can see the difference in performance R5 vs. R10 used in the pattern of 20-25% of the difference in usable capacity almost doubled.

Also worth noting is a very small difference in this pattern, the performance R5 vs. R6 with a significant difference in the resiliency of data raid groups, because R5 without
loss of data can survive a single disk failure (any), and R6 - the simultaneous failure of any two drives.




                                                                 diagram 5A                                                                                 diagram 5B

           5000                                                  R6 vs. R5 vs. R10                   6000                                                   R6 vs. R5 vs. R10
                                                                 512 I/O treads                      5000
                                                                                                                                                            512 I/O treads
           4000
                                                                 100%Random                                                                                 100%Random
                                                                                                     4000
           3000                                                  R/W=80/20                                                                                  R/W=80/20
                                                                                                     3000
  IOPS     2000                                                  IBM Storwize V7000 R6       IOPS                                                               IBM DS5300 R6
                                                                                                      2000
           1000
                                                                                                      1000
                                                                 IBM Storwize V7000 R5                                                                          IBM DS5300 R5
               0                                                                                          0
                    4K    8K                                                                                  4K
                                32K                                                                                  8K    32K
                                       64K    256K                                                                                64K
                                                                 IBM Storwize V7000 R10                                                  256K                   IBM DS5300 R10



                          block size                                                                                 block size
6.   Estimate the efficiency of data center space for each of the storage system on the example of the kind of performance, presumably, can be obtained using 18U **
        Space RM-cabinet.

**for IBM DS5300 - 19U




                                                             diagram 6A                                                                               diagram 6B
                                                             R10                                                                                      R5
        60000                                                512 I/O treads                      50000
                                                                                                                                                      512 I/O treads
                                                             100%Random                                                                               100%Random
        50000
                                                             R/W=80/20                           40000                                                R/W=80/20
        40000
                                                            IBM DS4700 96x 15K 3.5"              30000                                              IBM DS4700 96x 15K 3.5"
         30000
                                                            HDD, total 18U                        20000                                             HDD, total 18U
                                                                                          IOPS
 IOPS 20000
      10000                                                 IBM DS5300 80x 15K 3.5"               10000                                             IBM DS5300 80x 15K 3.5"
              0                                             HDD, total 19U                                                                          HDD, total 18U
                                                                                                       0
                  4K     8K                                                                                4K
                              32K                           IBM V7000 Storwize 216x                              8K    32K                          IBM V7000 Storwize 216x
                                      64K   256K                                                                              64K
                                                            10K 2.5" HDD, total 18U                                                 256K            10K 2.5" HDD, total 18U



                         block size                                                                             block size

As can be seen from the above chart, an example of test data storage systems, in terms of efficient use of space in the data center SFF-disc 2,5 "10K RPM is much more
efficient LFF-drive 3,5" 15K RPM - more than 2 times.
6.1   Let's count the power consumption for each of the configurations (Section 6) and display the chart 6.1a. Based on the data, calculate the average density in
      watt/unit - figure 6.1B.




           3500                                       diagram 6.1A                                     200                                    diagram 6.1B
                                                                                                        180
           3000                                                                                         160
                                                                                                        140
           2500
                                                                                                        120
           2000                                                                                         100
                                                    IBM DS4700 96x 15K 3.5"                              80                                 IBM DS4700 15K 3.5" HDD
           1500                                     HDD, total 18U                                       60
           1000                                                                                          40
                                                    IBM DS5300 80x 15K 3.5"                                                                 IBM DS5300 15K 3.5" HDD
                                                                                                         20
                                                    HDD, total 19U
             500                                                                                          0

               0                                    IBM V7000 Storwize 216x                                                                 IBM V7000 Storwize 10K
                                                    10K 2.5" HDD, total 18U                                                                 2.5" HDD
                                                                                                         aver
                                                                                                         age
               total                                                                                     watt/
               Watts                                                                                     unit
6.2 How to evaluate the efficiency of each derivative of storage, according to the criterion of maximum / minimum IOPS / unit *** - figure 6.2a and maximum /
minimum IOPS / Watt *** - figure 6.2B. According to the criteria of the benefits of storage with SFF HDD more than obvious.

*** In the test and calculated configurations were used only HDD media by using SSD - performance IOPS/Unit and IOPS/Watt will be much higher.




                                                                diagram 6.2A                                                                             diagram 6.2B
         3500                                                                                       30

         3000                                                                                       25
         2500
                                                                                                    20
         2000                                                 IBM DS4700 15K 3.5" HDD                                                                  IBM DS4700 15K 3.5" HDD
                                                                                                    15
          1500
                                                              IBM DS5300 15K 3.5" HDD                                                                  IBM DS5300 15K 3.5" HDD
                                                                                                     10
          1000
                                                              IBM V7000 Storwize 10K                  5                                                IBM V7000 Storwize 10K
           500
                                                              2.5" HDD                                                                                 2.5" HDD
              0                                                                                       0
                  maximum                                                                                 maximum
                                minimum                                                                                  minimum

                           iops/unit                                                                               iops/watt
Application


- All tested storage systems were connected to the same LPAR with AIX 6.1 TL6 SP4
- Used a JFS2 file system
- The size of the tested area was 640GB (total size of the test files)
- To create a load test was used package nstress, in particular utility ndisk64
 - For collecting and processing information about the response time of storage used by utilities NMON and NMON Analyser
respectively

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Perf Storwize V7000 Eng

  • 1. A comparison of storage performance IBM DS4700 vs. IBM DS5300 vs. IBM Storwize V7000
  • 2. 1. Configuration of test data storage systems: IBM DS4700 1GB RAM per controller HDD 15K RPM 3.5” (ST3300657FC 146GB) IBM DS5300 8GB RAM per controller HDD 15K RPM 3.5” (MBA3147FD 300GB) IBM Storwize V7000 8GB RAM per controller HDD 10K RPM 2.5” (Savvio 10K.3 300GB) Features HDD, used in the test storage Savvio 10K.3 MBA3147FD ST3300657FC Average latency time: 2 ms Average latency time: 2 ms Average latency time: 3 ms 2-platter 2-platter 2-platter Areal density: 112.8 Gbits/sq. in. Areal density (avg) 225Gbits/sq. in. Areal density (avg) 252Gbits/sq. in. Power requirement (ready) 14.8 W Average operating power 13.8W Average operating power 4.4W As can be seen from the above table, 10K RPM 2.5 "HDD SFF lose performance 15K RPM 3.5" HDD SFF, but have a substantially lower power consumption. According to tests of single disks, 15K RPM 3.5 "HDD give up 40% Input / Output operation Per Second (IOPS). But here, in this case, wondering how it will affect the final performance storage systems, whether we observe the same difference of 40% on iops? Proceed directly to the test. 2. When comparing the performance of the raid groups R10 used the following configuration: IBM DS4700 One raid group R10 (8+8) IBM DS5300 One raid group R10 (8+8) IBM Storwize V7000 One raid group R10 (8+8)
  • 3. 2.1. Results of testing with a load of 64 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R/W = 80/20 are shown in diagr.2.1a. The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 2.1b diagram 2.1B diagram 2.1A R10 R10 4000 12,0 64 I/O treads 64 I/O treads 3500 100%Random 100%Random 10,0 3000 R/W=80/20 2500 R/W=80/20 8,0 2000 IBM DS4700 (16x15K 3.5" 6,0 IBM DS4700 IOPS latency, ms 1500 HDD) 15K 3.5" HDD 1000 4,0 500 2,0 IBM DS5300 (16x15K 3.5" IBM DS5300 0 HDD) 0,0 15K 3.5" HDD 4K 8K 32K 64K 256K 4K 8K 32K IBM V7000 Storwize 64K 256K IBM V7000 (16x10K 2.5" HDD) Storwize 10K 2.5" HDD block size
  • 4. 2.2. The results of testing at a load of 512 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R / W = 80/20 are shown in diagram.2.2a. The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 2.2b. diagram 2.2A diagram 2.2B R10 R10 6000 512 I/O treads 14,0 512 I/O treads 5000 100%Random 12,0 100%Random 4000 R/W=80/20 10,0 R/W=80/20 3000 IBM DS4700 16x 15K 3.5" 8,0 IBM DS4700 IOPS HDD latency, ms 6,0 2000 15K 3.5" HDD 4,0 1000 IBM DS5300 16x 15K 3.5" 2,0 IBM DS5300 0 HDD 15K 3.5" HDD 0,0 4K 8K 32K 4K 8K 64K 256K 32K IBM V7000 IBM V7000 Storwize 16x 64K 256K Storwize 10K 10K 2.5" HDD 2.5" HDD block size
  • 5. 3. When comparing the performance of the raid groups used the following configuration R5: IBM DS4700 One raid group R5 (15+1) IBM DS5300 One raid group R5 (15+1) IBM Storwize V7000 One raid group R5 (15+1) 3.1. Results of testing with a load of 64 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R / W = 80/20 are shown in diagr.3.1a. The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 3.1b. diagram 3.1A diagram 3.1B R5 R5 3500 64 I/O treads 64 I/O treads 14,0 3000 100%Random 100%Random 12,0 2500 R/W=80/20 R/W=80/20 10,0 2000 8,0 IBM DS4700 IOPS 1500 IBM DS4700 16x 15K 3.5" latency, ms 15K 3.5" HDD HDD 6,0 1000 4,0 500 IBM DS5300 0 IBM DS5300 16x 15K 3.5" 2,0 15K 3.5" HDD HDD 0,0 4K 8K 32K 64K 4K IBM V7000 256K 8K 32K IBM V7000 Storwize 16x 64K Storwize 10K 10K 2.5" HDD 256K 2.5" HDD block size
  • 6. 3.2. The results of testing at a load of 512 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R / W = 80/20 are shown in diagr.3.2a. The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 3.2b diagram 3.2A diagram 3.2B R5 R5 4500 512 I/O treads 16,0 512 I/O treads 4000 100%Random 3500 14,0 100%Random R/W=80/20 12,0 3000 R/W=80/20 2500 IBM DS4700 16x 15K 3.5" 10,0 2000 8,0 IBM DS4700 IOPS HDD latency, ms 1500 6,0 15K 3.5" HDD 1000 4,0 IBM DS5300 16x 15K 3.5" 500 2,0 IBM DS5300 0 HDD 0,0 15K 3.5" HDD 4K 8K 4K 32K 64K IBM V7000 Storwize 16x 8K 32K 256K 64K IBM V7000 10K 2.5" HDD 256K Storwize 10K 2.5" HDD block size
  • 7. 4. When comparing the performance of the raid groups used the following configuration R6: IBM DS4700 does not support this type of raid IBM DS5300 One raid group R6 (14+2) IBM Storwize V7000 One raid group R6 (14+2) 4.1. Results of testing with a load of 64 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R / W = 80/20 are shown in diagr.4.1a. The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 4.1b. diagram 4.1B diagram 4.1A R6 R6 64 I/O treads 3000 64 I/O treads 8,0 100%Random 2500 100%Random 7,0 R/W=80/20 R/W=80/20 6,0 2000 5,0 1500 IBM DS4700 - not support latency, ms 4,0 IBM DS4700 - IOPS 1000 3,0 not support 500 2,0 IBM DS5300 16x 15K 3.5" 1,0 IBM DS5300 15K 0 HDD 0,0 3.5" HDD 4K 8K 4K 32K 64K 8K 256K 32K 64K 256K IBM V7000 IBM V7000 Storwize 16x Storwize 10K 10K 2.5" HDD 2.5" HDD block size
  • 8. 4.2 Test results at a load of 512 I / O processes for the block size 4KB, 8KB, 32KB, 64KB, 256KB at 100% random and load ratio R / W = 80/20 are shown in diagr.4.2a. The corresponding response time of the disk subsystem at the time of testing shown in the diagram. 4.2b. diagram 4.2A diagram 4.2A R6 R6 512 I/O treads 4000 512 I/O treads 7,0 100%Random 3500 100%Random 6,0 R/W=80/20 3000 R/W=80/20 5,0 2500 4,0 IBM DS4700 15K 2000 IBM DS4700 16x 15K IOPS 1500 latency, ms 3,0 3.5" HDD 3.5" HDD 1000 2,0 500 IBM DS5300 16x 15K 1,0 IBM DS5300 15K 0 3.5" HDD 3.5" HDD 0,0 4K 8K 4K 32K 64K IBM V7000 Storwize 16x 8K 32K IBM V7000 256K 10K 2.5" HDD 64K 256K Storwize 10K 2.5" HDD block size As seen from these results, the same number of HDD, IBM Storwize V7000 on all types of raids, shows the best result * than the old IBM DS4700 and behind the IBM DS5300 to an average of 5-15% iops, but a third of tests shows with less response time. * significantly worse outcome in iops and response time for the IBM DS4700 is in a block size of 256KB, presumably due to the lower plate density use HDD
  • 9. 5. It is well known that in the case of R5 and R6 to a raid group Random Write performance is significantly lower than in the case of R10. But in a typical database workload, as a rule, the percentage of write operations at times less than the read operations. What will be the difference for the test pattern, simulating the load of a typical DBMS? For ease of comparison, we reduce to a single chart (5A) The results of IBM Storwize V7000, and the other (5B) the results of IBM DS5300. As we can see the difference in performance R5 vs. R10 used in the pattern of 20-25% of the difference in usable capacity almost doubled. Also worth noting is a very small difference in this pattern, the performance R5 vs. R6 with a significant difference in the resiliency of data raid groups, because R5 without loss of data can survive a single disk failure (any), and R6 - the simultaneous failure of any two drives. diagram 5A diagram 5B 5000 R6 vs. R5 vs. R10 6000 R6 vs. R5 vs. R10 512 I/O treads 5000 512 I/O treads 4000 100%Random 100%Random 4000 3000 R/W=80/20 R/W=80/20 3000 IOPS 2000 IBM Storwize V7000 R6 IOPS IBM DS5300 R6 2000 1000 1000 IBM Storwize V7000 R5 IBM DS5300 R5 0 0 4K 8K 4K 32K 8K 32K 64K 256K 64K IBM Storwize V7000 R10 256K IBM DS5300 R10 block size block size
  • 10. 6. Estimate the efficiency of data center space for each of the storage system on the example of the kind of performance, presumably, can be obtained using 18U ** Space RM-cabinet. **for IBM DS5300 - 19U diagram 6A diagram 6B R10 R5 60000 512 I/O treads 50000 512 I/O treads 100%Random 100%Random 50000 R/W=80/20 40000 R/W=80/20 40000 IBM DS4700 96x 15K 3.5" 30000 IBM DS4700 96x 15K 3.5" 30000 HDD, total 18U 20000 HDD, total 18U IOPS IOPS 20000 10000 IBM DS5300 80x 15K 3.5" 10000 IBM DS5300 80x 15K 3.5" 0 HDD, total 19U HDD, total 18U 0 4K 8K 4K 32K IBM V7000 Storwize 216x 8K 32K IBM V7000 Storwize 216x 64K 256K 64K 10K 2.5" HDD, total 18U 256K 10K 2.5" HDD, total 18U block size block size As can be seen from the above chart, an example of test data storage systems, in terms of efficient use of space in the data center SFF-disc 2,5 "10K RPM is much more efficient LFF-drive 3,5" 15K RPM - more than 2 times.
  • 11. 6.1 Let's count the power consumption for each of the configurations (Section 6) and display the chart 6.1a. Based on the data, calculate the average density in watt/unit - figure 6.1B. 3500 diagram 6.1A 200 diagram 6.1B 180 3000 160 140 2500 120 2000 100 IBM DS4700 96x 15K 3.5" 80 IBM DS4700 15K 3.5" HDD 1500 HDD, total 18U 60 1000 40 IBM DS5300 80x 15K 3.5" IBM DS5300 15K 3.5" HDD 20 HDD, total 19U 500 0 0 IBM V7000 Storwize 216x IBM V7000 Storwize 10K 10K 2.5" HDD, total 18U 2.5" HDD aver age total watt/ Watts unit
  • 12. 6.2 How to evaluate the efficiency of each derivative of storage, according to the criterion of maximum / minimum IOPS / unit *** - figure 6.2a and maximum / minimum IOPS / Watt *** - figure 6.2B. According to the criteria of the benefits of storage with SFF HDD more than obvious. *** In the test and calculated configurations were used only HDD media by using SSD - performance IOPS/Unit and IOPS/Watt will be much higher. diagram 6.2A diagram 6.2B 3500 30 3000 25 2500 20 2000 IBM DS4700 15K 3.5" HDD IBM DS4700 15K 3.5" HDD 15 1500 IBM DS5300 15K 3.5" HDD IBM DS5300 15K 3.5" HDD 10 1000 IBM V7000 Storwize 10K 5 IBM V7000 Storwize 10K 500 2.5" HDD 2.5" HDD 0 0 maximum maximum minimum minimum iops/unit iops/watt
  • 13. Application - All tested storage systems were connected to the same LPAR with AIX 6.1 TL6 SP4 - Used a JFS2 file system - The size of the tested area was 640GB (total size of the test files) - To create a load test was used package nstress, in particular utility ndisk64 - For collecting and processing information about the response time of storage used by utilities NMON and NMON Analyser respectively