Re: Atomically adding a column to columns_

2010-09-27 Thread Jonathan Ellis
On Mon, Sep 27, 2010 at 1:54 PM, Peter Schuller wrote: > In the case of this bit of code, I believe, and I am not speaking > authoritatively, the removal only happens in (1) the read path when > filtering results (on presumably query-local data) and (2) during > compaction (on presumably compactio

Re: [VOTE] 0.7.0 beta2

2010-09-27 Thread Jonathan Ellis
Glass half empty: we broke reading beta1 schemas. this is fixed in https://issues.apache.org/jira/browse/CASSANDRA-1545 (which didn't make it into this beta2 tag) Glass half-full: starting to get used to taking 3 tries to approve a release :) On Mon, Sep 27, 2010 at 1:48 PM, Eric Evans wrote: >

Re: Any ODBC/JDBC driver for Cassandra

2010-09-27 Thread Eric Evans
On Mon, 2010-09-27 at 10:48 -0700, Weiping He wrote: > I new to Cassandra. I know it is not relational database and it is > NoSQL. Is there any ODBC/JDBC driver for Cassandra? This list is for the discussion of development of client APIs. General questions, including questions about the availabi

Re: Atomically adding a column to columns_

2010-09-27 Thread Peter Schuller
> Function addColumn at class SuperColumn tries to atomically add a column to > the concurrent collection “columns_” using the following code: Deletions in Cassandra involve an insertion of a tombstone rather than actual column deletion. In the case of this bit of code, I believe, and I am not sp

[VOTE] 0.7.0 beta2

2010-09-27 Thread Eric Evans
> It feels like 0.7.0-beta1 is becoming too distant a spec in the > rear-view, and the delta[1] is becoming quite large. I propose we > vote to release a new beta. The previous vote was waved off, so here is a new one. SVN: https://svn.apache.org/repos/asf/cassandra/tr...@r1001889 0.7.0-beta2 a

Re: [DISCUSSION] High-volume counters in Cassandra

2010-09-27 Thread Sylvain Lebresne
In CASSANDRA-1546, I propose an alternative to #1072. At it's core, it rewrites #1072 without the clocks structure (by splitting the clock into individual columns, not unlike what Zhu Han proposed in his preceding mail, but in a row instead of a super column, for reason explained in the issue). Bu