Figure first what is slow before adding yet more stuff
On May 24, 2011, at 14:06, Himanish Kushary <[email protected]> wrote: > Don't worry..its ok...i am going through one of those days for the last few > days :-) > > Jokes apart, when you talk about Caching, could we put something like > ehCache in-front of hbase integrated like a level-2 cache on top of the > already provided block cache ? > > - Himanish > > On Tue, May 24, 2011 at 3:19 PM, Michael Segel > <[email protected]>wrote: > >> >> Sorry, >> Its been one of those days. >> >> ---------------------------------------- >>> From: [email protected] >>> To: [email protected] >>> Subject: RE: HBase Transaction per second in Map-Reduce >>> Date: Tue, 24 May 2011 14:18:28 -0500 >>> >>> >>> >>> Himanish, >>> >>> Are we talking about an African or European Swallow? >>> (Sorry its a reference to the Monty Python movie scene where they cross >> the bridge after being asked 3 questions which they must answer correctly? >> [What's the forward air speed velocity of an unladen swallow?]) >>> >>> The point is that you're asking a question which has no valid answer >> because there are so many variables that will effect the timings. >>> >>> Just to list a couple of the things that will impact your performance: >>> 1) Hardware >>> 2) Network topology >>> 3) Table schema. >>> 4) Tuning of Hadoop environment >>> 5) Caching? Oh wait, that could be considered Tuning. >>> >>> So while I can understand that you want to improve your performance, you >> really have to get down and look at a couple of larger issues. >>> >>> -Mike >>> >>> PS. Whatever expectations you have, you'll need to lower them. ;-) >>> >>> ---------------------------------------- >>>> Date: Tue, 24 May 2011 14:31:21 -0400 >>>> Subject: HBase Transaction per second in Map-Reduce >>>> From: [email protected] >>>> To: [email protected] >>>> >>>> Hi, >>>> >>>> Could anybody please point to some article or paper which can give an >>>> understanding of the transaction per second (both read and write) that >> is >>>> supported or seen to be accomplished using HBase Map-Reduce. >>>> >>>> We have written few HBase Map-reduces which are not giving us the >>>> desired/expected performance . >>>> >>>> -- >>>> Thanks & Regards >>>> Himanish >>> >> >> > > > > -- > Thanks & Regards > Himanish
