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How to autogenerate timestamp with Spark Cassandra connector - Cassandra - [mail # user]
...Hi,I am trying to insert into the following column family using Spark Cassandra connector. CREATE TABLE myks.mycf (id bigint,msg text,type text,ts, timestamp,primary key (id, msg)) Is there ...
   Author: Shing Hing Man, 2014-11-11, 13:15
[expand - 2 more] - Re: Apache Cassandra 2.1.0 : cassandra-stress performance discrepancy between SSD and SATA drive - Cassandra - [mail # user]
...I have run a sysbench  file io test on my home PC and office PC. The result is  given below. The result shows my office PC (with a SSD) is about 3 times more performant than my hom...
   Author: Shing Hing Man, 2014-09-29, 18:49
Cassandra 2.0.5 : *-jb-27-Data.db (No such file or directory) - Cassandra - [mail # user]
...Hi,   I am running Cassandra 2.0.5 on my PC (with just one node and the default cassandra.yaml). I have inserted  one million rows into a column family (each row has a int key...
   Author: Shing Hing Man, 2014-09-08, 15:23
[expand - 1 more] - Re: Spark 1.0.2  Can  GroupByTest example be run in Eclipse without change - Spark - [mail # user]
...After looking at the source code of SparkConf.scala,   I found the following solution.Just set the following Java system property :-Dspark.master=localShingOn Monday, 1 September 2014, ...
   Author: Shing Hing Man, 2014-09-07, 08:14
Spark-cassandra-connector 1.0.0-rc5: java.io.NotSerializableException - Spark - [mail # user]
...Hi,My version of Spark is 1.0.2.I am trying to use Spark-cassandra-connector to execute an update csql statement inside an CassandraConnector(conf).withSessionDo  block :CassandraConnec...
   Author: Shing Hing Man, 2014-09-05, 14:27
Hadoop 2.2.0 :  Job not showing on resource management web UI - Hadoop - [mail # user]
...Hi, I have set up a single node Hadoop 2.2.0 .I can submit  wordcount  hadoop job to YARN from the command line.It run successfully and I checked the result is in hdfs. matmsh@gaus...
   Author: Shing Hing Man, 2014-06-28, 23:21
[expand - 5 more] - Re: How to lower the total number of map tasks - MapReduce - [mail # user]
...I have followed a suggestion on the given link, and set  mapred.min.sp lit.size to 134217728.  With the above mapred.min.split.size, I get     mapred.map.tasks =121 (previously it ...
   Author: Shing Hing Man, 2012-10-03, 13:50
[expand - 1 more] - Re: Pseudo mode :Reduce task  failed when there are more than one  reducers - MapReduce - [mail # user]
...After setting   mapred.child.java.opts=-Xmx512m (the default was 200m),    I no longer get the exception.  Shing      ___________ _____________________ From: Shing Hing M...
   Author: Shing Hing Man, 2011-07-10, 18:55
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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