Re: Multi-DC Environment Question

2014-06-16 Thread Vasileios Vlachos
Hello again, Back to this after a while... As far as I can tell whenever DC2 is unavailable, there is one node from DC1 that acts as a coordinator. When DC2 is available again, this one node sends the hints to only one node at DC2, which then sends any replicas to the other nodes in the local DC

Re: Cassandra 2.0.8 MemoryMeter goes crazy

2014-06-16 Thread horschi
Hi again, before people start replying here: I just reported a Jira ticket: https://issues.apache.org/jira/browse/CASSANDRA-7401 I think Memtable.maybeUpdateLiveRatio() needs some love. kind regards, Christian On Sat, Jun 14, 2014 at 10:02 PM, horschi hors...@gmail.com wrote: Hi everyone,

Re: Cassandra 2.0.8 MemoryMeter goes crazy

2014-06-16 Thread Robert Coli
On Sat, Jun 14, 2014 at 1:02 PM, horschi hors...@gmail.com wrote: this week we upgraded one of our Systems from Cassandra 1.2.16 to 2.0.8. All 3 nodes were upgraded. SStables are upgraded. One of your *clusters* or one of your *systems*? Running with split major versions is not supported.

Re: Cassandra 2.0.8 MemoryMeter goes crazy

2014-06-16 Thread horschi
Hi Robert, sorry, I am using our own internal terminology :-) The entire cluster was upgraded. All 3 nodes of that cluster are on 2.0.8 now. About the issue: To me it looks like there is something wrong in the Memtable class. Some very special edge case on CFs that are updated rarely. I cant

Re: Cassandra 2.0.8 MemoryMeter goes crazy

2014-06-16 Thread Robert Coli
On Mon, Jun 16, 2014 at 11:03 AM, horschi hors...@gmail.com wrote: About running mixed versions: I thought running mixed versions is ok. Running repair with mixed versions is not though. Right? Running with split major versions for longer than it takes to do a rolling restart is not