SQL Server Performance

Number of disks decrease performance

Discussion in 'Performance Tuning for Hardware Configurations' started by humut, Aug 29, 2006.

  1. humut New Member

    Does anyone have a good case regarding how much overhead extra discs in raid 1+0 konfiguration ?
    if 8 disks give 1040 iops, how many iops can be expected for 16 or 32 disks?
  2. joechang New Member

    it is possible to get linear scaling on small block random IOPS
    for large block and sequential IO, it is necessary to ensure sufficient bandwidth (multiple SCSI/FC channels)
  3. humut New Member

    thx for the answer
    Do you know any articles which document linear scaling?
    so i can provide them as documentation

  4. joechang New Member

    i am not aware of any documentation on disk io scaling
    it seems to be accepted as common knowledge by people who work on disk performance, so no one bothers to demonstrate this

    it is very easy to verify for yourself

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