On Wed, Jan 27, 2010 at 1:12 PM, Ryan King <r...@twitter.com> wrote: > On Wed, Jan 27, 2010 at 8:34 AM, Jonathan Ellis <jbel...@gmail.com> wrote: >> While being able to write (with CL.ZERO or new-in-0.6 ANY) even if all >> the real write targets are down is cool, but since your goal in real >> life is to keep enough replicas alive that you can actually do reads, >> I'm not sure how useful it is. HH also has a measurable performance >> problem in small clusters (that is, where cluster size is not much >> larger than replication factor) since having a node go down means you >> will increase the write load on the remaining nodes a non-negligible >> amount to write the hints, which can be a nasty surprise if you >> weren't planning for it. > > The HH code currently tries to send the hints to nodes other than the > natural endpoints. If small-scale performance is a problem, we could > make the natural endpoints be responsible for the hints. This reduces > durability a bit, but might be a decent tradeoff.
That is a good idea, I think we should make that change if we want to keep HH. -Jonathan
