Re: compaction_throughput_mb_per_sec

2016-01-05 Thread Jack Krupansky
I forwarded a comment to the docs team. It appears that they picked the language up from the cassandra.yaml file itself. Looking at use of system in that file, it seems that it usually means the node, the box running the node. -- Jack Krupansky On Tue, Jan 5, 2016 at 9:50 AM, Ken Hancock wrote:

Re: compaction_throughput_mb_per_sec

2016-01-05 Thread Ken Hancock
Will do. I searched the doc for additional usage of the term "system" commitlog_segment_size_in_mb refers to "every table in the system" concurrent_writes talks about CPU cores "in your system" That's it for "system" other than the compaction_throughput_mb_per_sec which refers to "across the ent

Re: compaction_throughput_mb_per_sec

2016-01-05 Thread Robert Coli
On Tue, Jan 5, 2016 at 6:50 AM, Ken Hancock wrote: > As to why I think it's cluster-wide, here's what the documentation says: > Do you see "system" used in place of "cluster" anywhere else in the docs? I think you are correct that the docs should standardize on "system" instead of "node", becau

Re: compaction_throughput_mb_per_sec

2016-01-05 Thread Ken Hancock
As to why I think it's cluster-wide, here's what the documentation says: https://docs.datastax.com/en/cassandra/1.2/cassandra/configuration/configCassandra_yaml_r.html compaction_throughput_mb_per_sec

Re: compaction_throughput_mb_per_sec

2016-01-04 Thread Jeff Jirsa
Why do you think it’s cluster wide? That param is per-node, and you can change it at runtime with nodetool (or via the JMX interface using jconsole to ip:7199 ) From: Ken Hancock Reply-To: "user@cassandra.apache.org" Date: Monday, January 4, 2016 at 12:59 PM To: "user@cassandra.apache.org"

Re: compaction_throughput_mb_per_sec

2016-01-04 Thread Nate McCall
> >> Also, as I increase my node count, I technically also have to increase my >> compaction_throughput which would require a rolling restart across the >> cluster. >> >> > You can set compaction throughput on each node dynamically via nodetool > setcompactionthroughput. > > > Also, the IOPS genera

Re: compaction_throughput_mb_per_sec

2016-01-04 Thread Nate McCall
> > > Also, as I increase my node count, I technically also have to increase my > compaction_throughput which would require a rolling restart across the > cluster. > > You can set compaction throughput on each node dynamically via nodetool setcompactionthroughput. -- - Nate McCal

Re: compaction_throughput_mb_per_sec

2016-01-04 Thread Carl Yeksigian
This is set in the cassandra.yaml on each node independently; it doesn't have to be same cluster-wide. On Mon, Jan 4, 2016 at 3:59 PM, Ken Hancock wrote: > I was surprised the other day to discover that this was a cluster-wide > setting. Why does that make sense? > > In a heterogeneous cassand