;) That was not the question ;) So Nick, merge on 1.1 is not recommended??? Was working very well on previous versions. Is ProcV2 really impact it that bad??
JMS 2016-04-01 13:49 GMT-04:00 Vladimir Rodionov <vladrodio...@gmail.com>: > >> This is something > >> which makes it far less useful for time-series databases with short TTL > on > >> the tables. > > With a right row-key design you will never have empty regions due to TTL. > > -Vlad > > On Thu, Mar 31, 2016 at 10:31 PM, Mikhail Antonov <olorinb...@gmail.com> > wrote: > > > Crazy idea, but you might be able to take stripped down version of region > > normalizer code and make a Tool to run? Requesting split or merge is done > > through the client API, and the only weighing information you need is > > whether region empty or not, that you could find out too? > > > > > > "Short of upgrading to 1.2 for the region normalizer," > > > > A bit off topic, but I think unfortunately region normalizer now ignores > > empty regions to avoid undoing pre-split on the table. This is something > > which makes it far less useful for time-series databases with short TTL > on > > the tables. We'll need to address that. > > > > -Mikhail > > > > On Thu, Mar 31, 2016 at 9:56 PM, Nick Dimiduk <ndimi...@gmail.com> > wrote: > > > > > Hi folks, > > > > > > I have a table with TTL enabled. It's been receiving data for a while > > > beyond the TTL and I now have a number of empty regions. I'd like to > drop > > > those empty regions to free up heap space on the region servers and > > reduce > > > master load. I'm running a 1.1 derivative. > > > > > > The only threads I found on this topic are from circa 0.92 timeframe. > > > > > > Short of upgrading to 1.2 for the region normalizer, what's the > > recommended > > > method of cleaning up this cruft? Should I be merging empty regions > into > > > their neighbor's? Looks like region merge hasn't been migrated to > ProcV2 > > > yet so would be wise to reduce online table activity, or at least aim > > for a > > > "quiet period"? Is there a documented process for off-lining and > > deleting a > > > region by name? I don't see anything in the book about it. > > > > > > I experimented with online merge on pseudodist, looks like it's working > > > fine for the most basic case. I'll probably pursue this unless someone > > has > > > some other ideas. > > > > > > Thanks, > > > Nick > > > > > > > > > > > -- > > Thanks, > > Michael Antonov > > >
