Cassandra mountable data store

2015-10-11 Thread srungarapu vamsi
Hi i have a 3 node cassandra cluster in aws. Each node is m3 large with 160GB hard disk. It has been 1 month and cassandra already occupied 51GB of my disk space. Obviously at some point of time i will run out of the disk space as the data keeps coming in. So, i would like to go in the path of mou

Re: compaction with LCS

2015-10-11 Thread Anishek Agarwal
Anyone has seen similar behavior with LCS, please do let me know, It will be good to know this can happen. On Fri, Oct 9, 2015 at 5:19 PM, Anishek Agarwal wrote: > Looks like some of the nodes have higher sstables on L0 and compaction is > running there, so only few nodes run compaction at a ti

Re: Realtime data and (C)AP

2015-10-11 Thread Graham Sanderson
Obviously QUORUM_OR_ONE is in general no better than ONE. However we hardly EVER fail back to ONE, and we are making a conscious choice. I’m okay with hiding it if it is too tempting, but for insert/append only workloads without deletes or TTL, it is a perfectly good trade off. Why not just use

Re: Realtime data and (C)AP

2015-10-11 Thread Ryan Svihla
Downgrading Consistency Policy suffers from effectively being the downgraded consistency policy aka CL one. I think it's helpful to remember that Consistency Level is effectively a contract on your consistency, if you do "quorum or one" you're basically CL ONE. Think of it this way, CL ONE usually

Re: Realtime data and (C)AP

2015-10-11 Thread Eric Stevens
The DataStax Java driver is based on Netty and is non blocking; if you do any CQL work you should look into it. At ProtectWise we use it with high write volumes from Scala/Akka with great success. We have a thin Scala wrapper around the Java driver that makes it act more Scalaish (eg, Scala futur