Behavior of nodetool stop compaction

2015-05-23 Thread Anuj Wadehra
Firing nodetool stop command prints CompactionInterruptedException stacktrace. 1. Exception stacktrace gives an impression of killing a compaction forcefully, is nodetool stop COMPACTION a clean way to interrupt an ongoing MAJOR compaction? 2. How the logic works? When nodetool stop is fired to

Is deletion of compactions_in_progress files safe?

2015-05-23 Thread Anuj Wadehra
I need to understand how compaction Algorithm works at high level. 1. What is the significance of systems.compactions_in_progress table and files in compactions_in_progress directory.  2. We are on 2.0.3. We frequently face scenarios where Cassandra fails to restart with Exception regarding unfi

Re: new version of Cassandra-stress doesn't support random read benchmark?

2015-05-23 Thread Benedict Elliott Smith
Hi Min, The key selection occurs prior to this. The operation has been assigned one (or more, in the case of user profile operations) partition keys, and this is just it accessing that key. You should explore backwards for assignment operations, and see where these happen, to understand how this b