Re: Many really small SSTables

2015-01-18 Thread Roland Etzenhammer
Hi, just as a short follow up, it worked - all nodes now have 20-30 sstables instead of thousands. Cheers, Roland

Re: Many really small SSTables

2015-01-16 Thread Eric Stevens
There's another thread going on right now in this list about compactions not happening when they seemingly should. Tyler Hobbs postulates a bug and workaround for it, so maybe try that out, and if that fixes anything for you, certainly let him know. The bug Tyler postulates on is triggered when

Re: Many really small SSTables

2015-01-15 Thread Eric Stevens
Yes, many sstables can have a huge negative impact read performance, and will also create memory pressure on that node. There are a lot of things which can produce this effect, and it strongly also suggests you're falling behind on compaction in general (check nodetool compactionstats, you should

Many really small SSTables

2015-01-15 Thread Roland Etzenhammer
Hi, I'm testing around with cassandra fair a bit, using 2.1.2 which I know has some major issues,but it is a test environment. After some bulk loading, testing with incremental repairs and running out of heap once I found that now I have a quit large number of sstables which are really