Re: complexity

2010-12-24 Thread Kevin Irwig
thanks all - and just to clarify the cost of getting a column (and a column given a SuperColumn) is also O(log N) ? From: Zhu Han To: user@cassandra.apache.org Sent: Sat, 25 December, 2010 3:16:08 AM Subject: Re: complexity Yep. I forgot about the binary sear

complexity

2010-12-23 Thread Kevin Irwig
Hi, I've seen a similar question has been asked in this forum in Sept, but not answered. What is the complexity of get(row) and get(row, column-name) operations, and insert(row, column)? What about accessing or inserting a column within a SuperColumn by name? In Arin Sarkissian's "WTF is a Su

Re: atomicity

2010-12-19 Thread Kevin Irwig
Thanks a lot, Peter. K. - Original Message From: Peter Schuller To: user@cassandra.apache.org Sent: Mon, 20 December, 2010 12:05:17 AM Subject: Re: atomicity > Say I have two processes on separate machines, and a Cassandra cluster over > several machines. If the first process writes (

atomicity

2010-12-18 Thread Kevin Irwig
Hi, Say I have two processes on separate machines, and a Cassandra cluster over several machines. If the first process writes (insert) to a column while the second process reads (get / get_slice / get_range_slices / others?) from that column (say the consistency level is QUORUM if that makes a

LongString

2010-09-01 Thread Kevin Irwig
Hi, I came across this presentation (link below) by Sarkissian (no first name given) at Digg about their use of Cassandra. On page 27 he says "Custom comparators turn out to be key" and mentions in the next few slides a LongString (actually once a LongString the other times a LongSting, but I'm

Re: compiled thrift

2010-08-29 Thread Kevin Irwig
Hi, if you're on windows, you can get binaries from http://www.bernhardglueck.com/archives/60 . Not sure how up to date they are though. cheers, Kevin. - Original Message - From: cassam read To: user@cassandra.apache.org Sent: Sunday, August 29, 2010 7:02 PM Subject: compile

Clients, protocols and TSockets

2010-08-28 Thread Kevin Irwig
Hi, performance wise, in a multi-threaded environment, should each Cassandra.Client have it's own new TBinaryProtocol and TSocket? (I'm using java) Or can many clients be created with the same protocol object? Thanks in advance, Kevin.