# [OmniOS-discuss] move dump and swap to other pool

Paul B. Henson henson at acm.org
Thu May 8 20:34:00 UTC 2014

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    > From: Dan McDonald
    > Sent: Thursday, May 08, 2014 7:38 AM
    >
    > And for swap (which should be good regardless what "newpool" is...):
    >
    > zfs create -V <size> newpool/swap

    Unless I'm misremembering, the default blocksize for a zvol is 8k, and the
    recommended blocksize for a swap zvol on x86 is 4k, so I usually explicitly
    specify the blocksize when creating a swap zvol:

    zfs create -b 4k -V <size> pool/swap

    Also, in the past there was a bug that could result in a kernel wedge unless
    you tweaked the cache settings for a zvol in use for swap:

    zfs set primarycache=metadata pool/swap
    zfs set secondarycache=none pool/swap

    Possibly that has been fixed? But I don't think it hurts either way, so I
    still do it.

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