Any thoughts on HBASE-9121. At it's heart it's just a version bump of HTrace to 2.0 (fully released into maven central and available on Cloudera's github). The new version of htrace is modularized so that hbase-client doesn't drag in any new dependencies on the client side.
Along with that modularization we would get the ability for 0.95/0.96 to relay to Zipkin producing some pretty useful info for stabilizing the release(tracing is what found that scan pre-fetching was broken) and very useful for our users. For me I think that it's small enough that it would meet a higher bar to get things into 0.95. But since there were some thoughts on here I've held off on comitting. On Mon, Aug 5, 2013 at 10:01 AM, Andrew Purtell <apurt...@apache.org> wrote: > Clarification would be great. I read Elliot's veto of our work as based on > both process and maturity concerns. Let's see how they stack up. > >> HFileV3: >> * Showed up very late in the merge window > > Same > >> * Still needs revisions > > Has not even been reviewed yet. Depends on code only existing in a > developer's private GitHub. > >> * Hasn't been put on large clusters publicly. > > Same > >> * Is not the green field HFileV3, and doesn't have time for a complete > re-do > > Not applicable > >> * Can easily be done without out downtime > > Same > >> * Will 100% have perf impacts. > > See my other comment about perf impacts if V3 is used without tags. > > > I have no objection to the trace work on technical grounds. > > > On Mon, Aug 5, 2013 at 8:31 AM, Stack <st...@duboce.net> wrote: > >> On Sat, Aug 3, 2013 at 3:10 PM, Andrew Purtell <apurt...@apache.org> >> wrote: >> >> > JIRA says that was created August 3, ie today, is that right? >> > >> > >> Yes. >> >> (Elliott can clarify later when he gets in) My understanding is that it is >> an update to our bundled htrace jar -- pushing a new release -- and adding >> some trace extra trace spans to expose where time is being spent during >> MTTR. >> >> St.Ack >> > > > > -- > Best regards, > > - Andy > > Problems worthy of attack prove their worth by hitting back. - Piet Hein > (via Tom White)
