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Re: Timeseries analysis using Cassandra and partition by date period - Cassandra - [mail # user]
...for timeseries analysis on top Cassandra.Depending on what you’re looking for, you might want to check out KairosDB.0.95 beta2 just shipped yesterday as well so you have good timing.https://...
   Author: Kevin Burton, 2015-04-05, 16:30
Best way to alert/monitor "nodetool status” down. - Cassandra - [mail # user]
...What’s the best way to monitor nodetool status being down? IE if a specificserver things a node is down (DN).Does this just use JMX?  IS there an API we can call?We want to tie it into ...
   Author: Kevin Burton, 2015-03-07, 00:38
ability to delete inactive queues? - Kafka - [mail # user]
...I’m considering porting an app from ActiveMQ to Kafka so I’m new here.Apologizes if this has been asked before.Is it possible to delete inactive queues?  Specifically queues with nomess...
   Author: Kevin Burton, 2015-02-22, 19:19
Does spark *always* fork its workers? - Spark - [mail # user]
...I want to map over a Cassandra table in Spark but my code that executesneeds a shutdown() call to return any threads, release file handles, etc.Will spark always execute my mappers as a fork...
   Author: Kevin Burton, 2015-02-18, 08:27
[expand - 1 more] - Re: Fastest way to map/parallel read all values in a table? - Cassandra - [mail # user]
...I had considered using spark for this but:1.  we tried to deploy spark only to find out that it was missing a numberof key things we need.2.  our app needs to shut down to release ...
   Author: Kevin Burton, 2015-02-09, 18:59
Re: High GC activity on node with 4TB on data - Cassandra - [mail # user]
...Do you have a lot of individual tables?  Or lots of small compactions?I think the general consensus is that (at least for Cassandra), 8GB heapsare ideal.If you have lots of small tables...
   Author: Kevin Burton, 2015-02-08, 21:11
Disabling the write ahead log with 2 data centers? - Cassandra - [mail # user]
...The WAL (and walls in general) impose a performance overhead.If one were to just take a machine out of the cluster, permanently, when amachine crashes, you could quickly get all the shards b...
   Author: Kevin Burton, 2015-01-23, 18:01
[expand - 2 more] - Re: number of replicas per data center? - Cassandra - [mail # user]
...Ah.. six replicas.  At least its super inexpensive that way (sarcasm!)On Sun, Jan 18, 2015 at 8:14 PM, Jonathan Haddad  wrote:Founder/CEO Spinn3r.comLocation: *San Francisco, CA*bl...
   Author: Kevin Burton, 2015-01-19, 04:52
[expand - 1 more] - Re: "Not enough replica available” when consistency is ONE? - Cassandra - [mail # user]
...OK.. so if I’m running with 2 replicas, then BOTH of them need to be onlinefor this to work.  Correct?  Because with two replicas I need 2 to form aquorum.This is somewhat confusin...
   Author: Kevin Burton, 2015-01-19, 01:31
[expand - 1 more] - Re: saveAsObjectFile is actually saveAsSequenceFile - Spark - [mail # user]
...Yes.. but this isn’t what the main documentation says.The file format isn’t very discoverable..Also, the documentation doesn’t say anything about the group by 10.. what’sthat about?KevinOn T...
   Author: Kevin Burton, 2015-01-13, 22:46
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB