I'm using the jars packed in Hector 0.6.0-19 (the one compatible with Cassandra 0.6.*). I wanted to use hector, but for some reason I haven't been able to do so yet. What I'm doing is a POC kind of thing, and only if it works out properly, we'll go on to build on it.
The reason I asked this question in the first place was a high idle cpu percentage. I'm currently doing the POC on an 8-core machine. I have 8 client threads inserting data into Cassandra. But, most of the time, I can see 40-45% user time, 15-20% system time and the rest idle - for each core, even if I change the number of client threads (increase or decrease). Then I used jstack on my Java application, and the result was exactly similar to the JIRA issue 1594. I was just wondering whether this can be the reason for idle CPU. Because the same application was earlier tried with Lucene (to store the indices) and we had about 90% CPU utilization. We've replaced Lucene with Cassandra (to store the index and inverted index), and the CPU utillization is down, the total time required went up by 5 folds (for the same data set). We tried Cassandra directly as apparently Lucandra is 10% slower than Cassandra... Arijit On 25 January 2011 20:30, Nate McCall <n...@riptano.com> wrote: > What version of the Thrift API are you using? > > (In general, you should use an existing client library rather than > rolling your own - I recommend Hector: > https://github.com/rantav/hector). > > On Tue, Jan 25, 2011 at 12:38 AM, Arijit Mukherjee <ariji...@gmail.com> wrote: >> I'm using Cassandra 0.6.8. I'm not using Hector - it's just raw thrift APIs. >> >> Arijit >> >> On 21 January 2011 22:13, Nate McCall <n...@riptano.com> wrote: >>> What versions of Cassandra and Hector? The versions mentioned on this >>> ticket are both several releases behind. >>> >>> On Fri, Jan 21, 2011 at 3:53 AM, Arijit Mukherjee <ariji...@gmail.com> >>> wrote: >>>> Hi All >>>> >>>> I'm facing the same issue as this one mentioned here - >>>> https://issues.apache.org/jira/browse/CASSANDRA-1594 >>>> >>>> Is there any solution or work-around for this? >>>> >>>> Regards >>>> Arijit >>>> >>>> >>>> -- >>>> "And when the night is cloudy, >>>> There is still a light that shines on me, >>>> Shine on until tomorrow, let it be." >>>> >>> >> >> >> >> -- >> "And when the night is cloudy, >> There is still a light that shines on me, >> Shine on until tomorrow, let it be." >> > -- "And when the night is cloudy, There is still a light that shines on me, Shine on until tomorrow, let it be."
