That sounds like "Did you start beating your wife recently or have you been beating her for a long time now?" :)
Ron On Mon, 2010-05-10 at 09:00 -0700, Paul Prescod wrote: > Does the Caasandra performance start fast and slow down (indicating > some buffer being filled) or does it start slow and stay slow? > > On Mon, May 10, 2010 at 2:05 AM, David Boxenhorn <da...@lookin2.com> wrote: > > I read something like 80,000 rows from Oracle and write them to Cassandra in > > chunks of 1000 rows - so I'm supposedly working to Cassandra's strength and > > Oracle's weakness. > > > > Reading 1000 rows from Oracle is "instantaneous", writing them takes maybe > > 30 seconds. Not too much data per row, maybe 1K. > > > > > > > > On Mon, May 10, 2010 at 11:48 AM, Ran Tavory <ran...@gmail.com> wrote: > >> > >> Hector uses tsocket. not sure what you mean by "buffered" - is that > >> framed? Hector by default does not use framed. > >> The code is here if you'd like to have a > >> look > >> http://github.com/rantav/hector/blob/master/src/main/java/me/prettyprint/cassandra/service/CassandraClientFactory.java#L77 > >> However, I find it hard to believe that the actual connection is the > >> slowing factor. > >> Roughly speaking, cassandra is fast on writes and slow on reads. Exact > >> numbers are per-scenario so it's hard to say, but if you only write and > >> objects are small then from my experience you should expect a few k writes > >> per second on a single host. How much do you see? > >> There are many configuration factors and they all depend on expected usage > >> and available h/w. > >> > >> On Mon, May 10, 2010 at 11:27 AM, vd <vineetdan...@gmail.com> wrote: > >>> > >>> What is the complete code string you are using to connect with cassandra > >>> from Java code > >>> > >>> > >>> > >>> On Mon, May 10, 2010 at 1:49 PM, David Boxenhorn <da...@lookin2.com> > >>> wrote: > >>>> > >>>> I don't know what "TSocket or the buffered one" means. Maybe I should > >>>> know? > >>>> > >>>> I'm using Hector. Does that explain anything? > >>>> > >>>> On Mon, May 10, 2010 at 11:15 AM, vd <vineetdan...@gmail.com> wrote: > >>>>> > >>>>> Hi > >>>>> > >>>>> what is it that you are using to connect with cassnadra TSocket or the > >>>>> buffered one ? > >>>>> > >>>>> > >>>>> ____________________________________ > >>>>> > >>>>> _______________________________________ > >>>>> > >>>>> > >>>>> > >>>>> On Mon, May 10, 2010 at 1:29 PM, David Boxenhorn <da...@lookin2.com> > >>>>> wrote: > >>>>>> > >>>>>> I'm running Java on the client, jdbc queries on Oracle, Hector on > >>>>>> Cassandra. > >>>>>> > >>>>>> The Cassandra and Oracle database designs are radically different, as > >>>>>> you might guess. > >>>>>> > >>>>>> I have no doubt that Cassandra can be tuned, in a multiple-server > >>>>>> cluster, to have superior throughput (that's why I'm doing it!). But > >>>>>> for > >>>>>> now, it's really frustrating my development effort that Cassandra is so > >>>>>> slow. Can't I get it up to twice as slow as Oracle in my configuration? > >>>>>> > >>>>>> On Mon, May 10, 2010 at 10:47 AM, vd <vineetdan...@gmail.com> wrote: > >>>>>>> > >>>>>>> Hi David > >>>>>>> > >>>>>>> If I may ask...how do you plan to import data from oracle to > >>>>>>> cassandra ? > >>>>>>> As answer AFAIK cassandra's true ability comes into play when running > >>>>>>> on more than one machine...and please share how you are making > >>>>>>> comparisons > >>>>>>> like on writes or reads from cassandra. > >>>>>>> > >>>>>>> > >>>>>>> > >>>>>>> _______________________________________ > >>>>>>> _______________________________________ > >>>>>>> > >>>>>>> > >>>>>>> > >>>>>>> > >>>>>>> On Mon, May 10, 2010 at 1:04 PM, David Boxenhorn <da...@lookin2.com> > >>>>>>> wrote: > >>>>>>>> > >>>>>>>> I'm running Oracle and Cassandra on my machine, trying to import my > >>>>>>>> data to Cassandra from Oracle. > >>>>>>>> > >>>>>>>> In my configuration Oracle is about ten times faster than Cassandra. > >>>>>>>> Cassandra has out-of-the-box tuning. > >>>>>>>> > >>>>>>>> I am new to Cassandra. How do I begin trying to tune it? > >>>>>>>> > >>>>>>>> Thanks. > >>>>>>> > >>>>>> > >>>>> > >>>> > >>> > >> > > > >
