At Sat, 31 Dec 2011 12:22:00 +0800, Liu Yuan wrote: > > On 12/29/2011 01:36 AM, MORITA Kazutaka wrote: > > > - add write-cache support > > http://lists.wpkg.org/pipermail/sheepdog/2011-October/001480.html > > > > > Qemu folks has been playing with 'image streaming' feature that grab a > image backed over network in the background. If the image is fully > downloaded, the IO will be on that local image instead of routing to > sheep cluster. If users don't update the remote images on Sheepdog at all, write-cache support is not needed. But I don't think all users would use Sheepdog with image streaming. Write-cache support is one of the essential features for block-level storage system to boost write performance. Thanks, Kazutaka > > http://lists.gnu.org/archive/html/qemu-devel/2011-06/msg01471.html > > So I wonder if we need write-cache implemented by sheep that might > duplicate this feature. |