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ZFS Raid 0 Performance

mikeyosm
in General Support

Featured Replies

Hi

 

I am experimenting with a RAID 0 ZFS pool and getting odd read/write stats.

I created a pool with 2 x WD black nvme PCIe 4.0 2tb drives in RAID 0.

Running dd on the ZFS share gives me around 3GB/s. I am expecting closer to 10GB/s given both drives are in RAID 0 effectively doubling the speed no? The drives are rated at 5GB/s write and I get that on a single drive. Is there some tuning I need to do?

  • Quote
    • Community Expert

    dd is not really a good way to test, look for FIO, IIRC it can be installed with un-get, also keep in mind that zfs can be difficult to benchmark due to the ARC.

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    • Thanks 1

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