On Fri, Feb 01, 2013 at 05:25:29PM -0800, Kent Overstreet wrote: > Also, where's the end user documentation? I was trying not to explode this patch's size, since the doc can go straight into Documentation/ without as much fuss as, say, the ~1600 checkpatch warnings and all the other comments we'll have about the source code. > On Fri, Feb 1, 2013 at 5:23 PM, Kent Overstreet <koverstreet@xxxxxxxxxx> wrote: > > On Fri, Feb 1, 2013 at 4:57 PM, Michel Lespinasse <walken@xxxxxxxxxx> wrote: > >> On Fri, Feb 1, 2013 at 4:44 PM, Darrick J. Wong <darrick.wong@xxxxxxxxxx> wrote: > >>> This is a patch to migrate STEC's enhanceio driver out of their github > >>> repository and into the staging tree. From their README: > >>> > >>> "EnhanceIO driver is based on EnhanceIO SSD caching software product developed > >>> by STEC Inc. EnhanceIO was derived from Facebook's open source Flashcache > >>> project. EnhanceIO uses SSDs as cache devices for traditional rotating hard > >>> disk drives (referred to as source volumes throughout this document). > >>> EnhanceIO can work with any block device, be it an entire physical disk, an > >>> individual disk partition, a RAIDed DAS device, a SAN volume, a device mapper > >>> volume or a software RAID (md) device." > >> > >> What's your take on the benefits of this vs bcache ? > > > > I've been trying to review it it for cache coherency and consistency > > wrt. power failures, but the complete lack of high level documentation > > is making that difficult. Agreed. :/ > > I saw some benchmarks the other day where on writes EIO was faster > > than the raw device, which was... suspicious. Hmm, I haven't seen /that/, but then I wasn't specifically looking for it either. --D -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
