Vaibhav By caching do you mean storing storing all the rows in a HashMap in the memory , so that u can access that map repeatedly instead of Disk IOs ?
Thanks On Wed, Aug 12, 2009 at 4:53 AM, Vaibhav Puranik <[email protected]> wrote: > Amandeep, > > We are caching Hbase results in memory (in a HashMap). > > Regards, > Vaibhav > > On Tue, Aug 11, 2009 at 12:56 PM, Amandeep Khurana <[email protected]> > wrote: > > > Vaibhav, > > > > What kind of caching are you doing over hbase and how? > > > > -Amandeep > > > > > > Amandeep Khurana > > Computer Science Graduate Student > > University of California, Santa Cruz > > > > > > On Tue, Aug 11, 2009 at 10:48 AM, Vaibhav Puranik <[email protected] > > >wrote: > > > > > We are using HBase 0.20 (Trunk version at 23rd July evening) in > > production > > > environment at GumGum. > > > > > > Our experience is very good. Initially I mistakenly forgot to add > caching > > > (even though we had planned for it) and every request was fetching two > > rows > > > from Hbase and inserting one row in HBase. > > > In spite of that our request processing time was less than 300 ms. > > > > > > We are not getting huge amounts of requests - we approximately get > 25,000 > > > to > > > 30,000 requests to our web app backed by HBase every day. > > > > > > We have a 4 node cluster running on EC2 (Large instances) and so far we > > > haven't faced any production problem. > > > (Hope it works out that way all the time!) > > > > > > Regards, > > > Vaibhav Puranik, > > > GumGum > > > > > > > > > > > > > > > On Tue, Aug 11, 2009 at 10:29 AM, Fabio Kaminski < > > > [email protected] > > > > wrote: > > > > > > > is there anyone with experience in hbase 0.20 realtime application, > > > > preferably in production environment? > > > > > > > > in thinking in throw away all my legacy knowledge about what i think > > > about > > > > systems.. cause i think this is the hadoop(and hbase) are the next > big > > > > thing > > > > in tecnology.. i really buy this concept and im glady that i found it > > > right > > > > in it's inception. > > > > > > > > Im preparing to work with hadoop and hbase for realtime environment, > > and > > > i > > > > could see that the hbase engineers are preparing hbase for realtime > > > > applications, like rdbms standards does, but in a new and promissing > > > > environment. this is undoubtly a paradigm shift! > > > > > > > > anyone with realtime application runing in such environment? could > you > > > > share > > > > some of you experience with it? > > > > > > > > Thanks ! > > > > > > > > Fabio Kaminski > > > > > > > > > >
