nosql yes but yescql, no?

2011-06-08 Thread SriSatish Ambati
Gotta love, Eric! http://www.slideshare.net/jericevans/nosql-yes-but-yescql-no <https://twitter.com/#!/jericevans/status/78118651043127297> -- SriSatish Ambati Director of Engineering, DataStax @srisatish

Re: batch dump of data from cassandra?

2011-05-23 Thread SriSatish Ambati
key lookups one by > >>> one, while I really do not care about which key corresponds to which > >>> result, a simple scraping of the underlying SSTable would > >>> be perfect, because I could utilize the file cache coherency as I read > >>> down the file. > >>> > >>> > >>> Thanks > >>> Yang > >>> > >> > >> > >> > >> -- > >> Jonathan Ellis > >> Project Chair, Apache Cassandra > >> co-founder of DataStax, the source for professional Cassandra support > >> http://www.datastax.com > >> > > > -- SriSatish Ambati Director of Engineering, DataStax @srisatish

Re: Java segfault

2011-03-20 Thread SriSatish Ambati
Indeed. This is likely at the JVM level.. (if not lower down the stack) Do you happen to have a hs*err file for the crash? Is it reproducible? What 'java -version"? What version of linux? thanks, Sri On Sun, Mar 20, 2011 at 5:48 PM, Jonathan Ellis wrote: > segfaults are either a JVM bug (are y

Re: Cassandra GC Settings

2011-01-17 Thread SriSatish Ambati
Thanks, Dan: Yes, -Xmn512MB/1G sizes the Young Generation explicitly and removes the adaptive resizing out of the picture. (If at all possible send your gc log over & we can analyze the promotion failure a little bit more finely.) The low load implies that that you are able to use the parallel thr

Re: Cassandra GC Settings

2011-01-17 Thread SriSatish Ambati
Dan, Please kindly attach your: 1) java -version 2) full commandline settings, heap sizes. 3) gc log from one of the nodes via: -XX:+PrintTenuringDistribution \ -XX:+PrintGCDetails \ -XX:+PrintGCTimeStamps \ -Xloggc:/var/log/cassandra/gc.log \ 4) number of cores on your system. How busy is the s