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).

[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

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

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

Re: Atomically adding a column to columns_

2010-09-27 Thread Jonathan Ellis
On Mon, Sep 27, 2010 at 1:54 PM, Peter Schuller peter.schul...@infidyne.com 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