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[IMPALA-60] Significant performance difference for count(*) vs count(x) in wide table - Impala - [issue]
...I have a table with 101 columns stored as a snappy-compressed sequence file delimited by ^A.  [localhost:21000] > select count(*) from my_table;Query: select count(*) from my_tableQu...
http://issues.cloudera.org/browse/IMPALA-60    Author: Philip Zeyliger, 2014-11-25, 07:11
[AVRO-1610] HttpTransceiver.java allocates arbitrary amount of memory - Avro - [issue]
...In HttpTransceiver.java, Avro does:      int length = (in.read()<<24)+(in.read()<<16)+(in.read()<<8)+in.read();      if (length == 0...
http://issues.apache.org/jira/browse/AVRO-1610    Author: Philip Zeyliger, 2014-11-25, 05:49
[BIGTOP-872] Separate docs into doc packages - Bigtop - [issue]
...Hadoop projects turn out to use a non-trivial amount of disk space in /usr/share/doc.  When the packages are decompressed onto the file system, the docs tend to eat up 30% or so of the ...
http://issues.apache.org/jira/browse/BIGTOP-872    Author: Philip Zeyliger, 2014-09-06, 08:10
[HADOOP-6241] Script to split configurations from one file into multiple, according to templates. - Hadoop - [issue]
...This script moves properties from hadoop-site.xml into common-site, mapred-site, and hdfs-site in a reasonably generic way.  This is useful for upgrading clusters from 0.18 to 0.20 and ...
http://issues.apache.org/jira/browse/HADOOP-6241    Author: Philip Zeyliger, 2014-07-23, 21:43
[MAPREDUCE-207] Computing Input Splits on the MR Cluster - MapReduce - [issue]
...Instead of computing the input splits as part of job submission, Hadoop could have a separate "job task type" that computes the input splits, therefore allowing that computation to happen on...
http://issues.apache.org/jira/browse/MAPREDUCE-207    Author: Philip Zeyliger, 2014-07-22, 22:14
[HBASE-6402] Ability to explicitly include and exclude hosts from cluster - HBase - [issue]
...Both MR and HDFS (see http://hadoop.apache.org/common/docs/r0.20.0/cluster_setup.html; look for "dfs.hosts", "dfs.hosts.exclude", "mapred.hosts", "mapred.hosts.exclude") provide the user a w...
http://issues.apache.org/jira/browse/HBASE-6402    Author: Philip Zeyliger, 2014-07-14, 20:56
Re: Union resolution in dynamic languages - Avro - [mail # user]
...For what it's worth, I've taken, for reasons including the tricky handlingin dynamic things, I've taken to defining "unions" in the Thrift orProtocol Buffer style.  Instead of "union(A,...
   Author: Philip Zeyliger, 2014-06-05, 18:15
[HADOOP-8292] TableMapping does not refresh when topology is updated - Hadoop - [issue]
...HADOOP-7030 introduced TableMapping, an implementation of DNSToSwitchMapping which uses a file to map from IPs/hosts to their racks.  It's intended to replace ScriptBasedMapping for cas...
http://issues.apache.org/jira/browse/HADOOP-8292    Author: Philip Zeyliger, 2014-05-14, 22:14
Re: [VOTE] Avro release 1.7.6 (rc0) - Avro - [mail # dev]
...+1.  I ran the Java tests on Linux.(note that I had some trouble with the Java tests on Mac, but I've got anew system, so I haven't had a chance to dig in)On Fri, Jan 10, 2014 at 1:49 P...
   Author: Philip Zeyliger, 2014-01-23, 21:00
[HDFS-2933] Improve DataNode Web UI Index Page - HDFS - [issue]
...If you visit the root page of a datanode's web port, you get an index page with WEB-INF and robots.txt.  More useful would be to include information about the datanode, like its version...
http://issues.apache.org/jira/browse/HDFS-2933    Author: Philip Zeyliger, 2013-12-22, 00:47
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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