Wednesday Nov 18, 2009

Sun Flash Accelerator F20 PCIe Card Achieves 100K 4K IOPS and 1.1 GB/sec

Part of the Sun FlashFire family, the Sun Flash Accelerator F20 PCIe Card is a low-profile x8 PCIe card with 4 Solid State Disks-on-Modules (DOMs) delivering over 101K IOPS (4K IO) and 1.1 GB/sec throughput (1M reads).

The Sun F20 card is designed to accelerate IO-intensive applications, such as databases, at a fraction of the power, space, and cost of traditional hard disk drives. It is based on enterprise-class SLC flash technology, with advanced wear-leveling, integrated backup protection, solid state robustness, and 3M hours MTBF reliability.

  • The Sun Flash Accelerator F20 PCIe Card demonstrates breakthrough performance of 101K IOPS for 4K random read
  • The Sun Flash Accelerator F20 PCIe Card can also perform 88K IOPS for 4K random write
  • The Sun Flash Accelerator F20 PCIe Card has unprecedented throughput of 1.1 GB/sec.
  • The Sun Flash Accelerator F20 PCIe Card (low-profile x8 size) has the IOPS performance of over 550 SAS drives or 1,100 SATA drives.

Performance Landscape

Bandwidth and IOPS Measurements

Test DOMs
4 2 1
Random 4K Read 101K IOPS 68K IOPS 35K IOPS
Maximum Delivered Random 4K Write 88K IOPS 44K IOPS 22K IOPS
Maximum Delivered 50-50 4K Read/Write 54K IOPS 27K IOPS 13K IOPS
Sequential Read (1M) 1.1 GB/sec 547 MB/sec 273 MB/sec
Maximum Delivered Sequential Write (1M) 567 MB/sec 243 MB/sec 125 MB/sec

Sustained Random 4K Write\* 37K IOPS 18K IOPS 10K IOPS
Sustained 50/50 4K Read/Write\* 34K IOPS 17K IOPS 8.6K IOPS

(\*) Maximum Delivered values measured over a 1 minute period. Sustained write performance differs from maximum delivered performance. Over time, wear-leveling and erase operations are required and impact write performance levels.

Latency Measurements

The Sun Flash Accelerator F20 PCIe Card is tuned for 4 KB or larger IO sizes, the write service for IOs smaller than 4 KB can be 10 times more than shown in the table below. It should also be noted that the service times shown below are both the latency and the time to transfer the data. This becomes the dominant portion the the service time for IOs over 64 KB in size.

Transfer Size Service Time (ms)
Read Write
4 KB 0.32 0.22
8 KB 0.34 0.24
16 KB 0.37 0.27
32 KB 0.43 0.33
64 KB 0.54 0.46
128 KB 0.49 1.30
256 KB 1.31 2.15
512 KB 2.25 2.25

- Latencies are measured application latencies via vdbench tool.
- Please note that the FlashFire F20 card is a 4KB sector device. Doing IOs of less than 4KB in size, or not aligned on 4KB boundaries, can result in a significant performance degradations on write operations.

Results and Configuration Summary

Storage:

    Sun Flash Accelerator F20 PCIe Card
      4 x 24-GB Solid State Disks-on-Modules (DOMs)

Servers:

    1 x Sun Fire X4170

Software:

    OpenSolaris 2009.06 or Solaris 10 10/09 (MPT driver enhancements)
    Vdbench 5.0
    Required Flash Array Patches SPARC, ses/sgen patch 138128-01 or later & mpt patch 141736-05
    Required Flash Array Patches x86, ses/sgen patch 138129-01 or later & mpt patch 141737-05

Benchmark Description

Sun measured a wide variety of IO performance metrics on the Sun Flash Accelerator F20 PCIe Card using Vdbench 5.0 measuring 100% Random Read, 100% Random Write, 100% Sequential Read, 100% Sequential Write, and 50-50 read/write. This demonstrates the maximum performance and throughput of the storage system.

Vdbench profile f20-parmfile.txt is here for bandwidth and IOPs. And here is the vdbench profile f20-latency.txt file for latency.

Vdbench is publicly available for download at: http://vdbench.org

Key Points and Best Practices

  • Drive each Flash Modules with 32 outstanding IO as shown in the benchmark profile above.
  • SPARC platforms will align with the 4K boundary size set by the Flash Array. x86/windows platforms don't necessarily have this alignment built in and can show lower performance

See Also

Disclosure Statement

Sun Flash Accelerator F20 PCIe Card delivered 100K 4K read IOPS and 1.1 GB/sec sequential read. Vdbench 5.0 (http://vdbench.org) was used for the test. Results as of September 14, 2009.

About

BestPerf is the source of Oracle performance expertise. In this blog, Oracle's Strategic Applications Engineering group explores Oracle's performance results and shares best practices learned from working on Enterprise-wide Applications.

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