On Mon, Oct 28, 2013 at 5:10 PM, Brian Behlendorf <[email protected]>wrote:
> On 10/25/13 09:38, Matthew Ahrens wrote: > >> >> >> >> On Wed, Oct 23, 2013 at 12:21 PM, Steven Hartland >> <[email protected] <mailto:[email protected]>> wrote: >> >> I've been looking through the http://open-zfs.org/wiki/__Features >> >> <http://open-zfs.org/wiki/Features> >> list today, updating a few things and have noticed a few items >> which the ZFS On Linux folks have implemeted that currently >> aren't in FreeBSD. >> >> I've ported a couple simple ones today but the following few >> I'm not as familar with the code area with so would appreciate >> some feedback on. >> >> FASTWRITE Algorithm: Improves synchronous IO performance. >> https://github.com/zfsonlinux/__zfs/commit/__ >> 920dd524fb2997225d4b1ac180bcbc__14b045fda6 >> >> <https://github.com/zfsonlinux/zfs/commit/ >> 920dd524fb2997225d4b1ac180bcbc14b045fda6> >> >> >> This idea seems promising. I haven't looked at the code. >> >> >> >> Use the slog even with logbias=throughput >> https://github.com/zfsonlinux/__zfs/commit/__ >> 5d7a86d114c2706a8d14d94b71f81a__d5cdf066c5 >> >> <https://github.com/zfsonlinux/zfs/commit/ >> 5d7a86d114c2706a8d14d94b71f81ad5cdf066c5> >> >> >> This makes sense to me. I would suggest porting this first since it's >> simpler and easy to understand. >> >> --matt >> > > Both of these changes significantly improved synchronous write performance > under Linux when using a ZIL device. There have been no reported adverse > effects. We would love further review of these changes by the community. > "Use the slog even with logbias=throughput" looks good to me. --matt
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