XVM Performance Testing Results

Host/Server (Magic)

SGI Onyx2
8 250MHz R10K
7168 Mbytes RAM
4 QL1040B differenial SCSI controllers
IRIX 6.5.12f

Storage

Legasys 8 drive SCSI array
Quantum Atlas 10KII Drives
  • 10,000 RPM
  • 4.7ms seek time
  • 478 Mbits/sec internal transfer rate
    • These tests were run from csh scripts with the xdd program.

    Test 1

    Buffered reads and writes with a file size of 8192MB and XVM stripe sizes of 64, 128, and 256

    Test 2

    Buffered/Direct reads and writes with a file size of 512MB and XVM stripe sizes of 128, 256, and 512