Hello, I read about "short circuit reads" in the HBase documentation's performance section[1] and was wondering what people's experiences were using this in a production setting.
Also, 1. Since only one dedicated user can take advantage of the feature do you launch all jobs as this user? 2. Can dfs.client.read.shortcircuit be set to false for jobs wich are not launched by the short-circuit user in order to avoid exceptions? In other words - can this setting be overriden by the client configuration's hbase-site.xml? 3. In the same context, it is suggested to enable HBase internal checksums[2]. Is this a feature which can be enabled in HBase 0.92.1 which is part of the Cloudera 4.1.x release? Thank you, /David [1] http://hbase.apache.org/book/perf.hdfs.html#ftn.d2145e7370 [2] https://issues.apache.org/jira/browse/HBASE-5074
