100 is a good idea. It's one of the most common questions on the dist-list (e.g., hey my MR job is slow? answer: set caching to something more than 1).
On 10/17/12 1:12 AM, "Stack" <st...@duboce.net> wrote: >On Tue, Oct 16, 2012 at 8:25 PM, lars hofhansl <lhofha...@yahoo.com> >wrote: >> We just ran into this again today, where we forgot to set scanner >>caching and observed bad performance. >> The default of 1 does not seem to make any sense (except for very >>specific case of large/wide rows). >> >> Any value between 10 and 1000 should be OK, really. Maybe the default >>should be 100. >> >> This would also go some way to avoid the perception that HBase is slow >>for folks who are just playing around with it. >> > >I'd say all our defaults could do w/ an edit but am fine starting w/ >this one alone (Or we have the UI come w/ flashing neon saying the >configs are super conservative and must be tuned). > >St.Ack >
