|
| From: | Jamie Lokier |
| Subject: | Re: [Qemu-devel] [PATCH 1/4] block: add enable_write_cache flag |
| Date: | Mon, 31 Aug 2009 23:59:25 +0100 |
| User-agent: | Mutt/1.5.13 (2006-08-11) |
Anthony Liguori wrote: > Can someone do some benchmarking with cache=writeback and fdatasync > first and quantify what the real performance impact is? Unfortunately we can't yet quantify the impact on the hardware I care about (ordinary consumer PCs with non-NCQ SATA disks), because Linux hosts don't *yet* implement O_SYNC or fdatasync properly. I would expect the performance difference to be much more significant after those are implemented on the host. -- Jamie
| [Prev in Thread] | Current Thread | [Next in Thread] |