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Re: Compression in Hive - Hive - [mail # user]
...1. We use LZO compression in our MR jobs that create LZO files (these are NOT sequence files)  that are the feeder files for Hive 2. Then we we use Hive data (LZO files) and run aggrega...
   Author: Sanjay Subramanian, 2013-06-11, 23:06
Running hadoop commands through Hive -e and -f option - this is not a question, just some answers :-) - Hive - [mail # user]
...Hi  As a part of my oozie flows I need to create "touchz" files to notify status of each stage. I could never get Oozie shell action to work so I wanted to see if I could use Hive to ru...
   Author: Sanjay Subramanian, 2013-06-07, 17:47
[expand - 2 more] - Re: .sql vs. .hql - Hive - [mail # user]
...Ok cool  On 5/31/13 2:00 PM, "Keith Wiley"  wrote:    CONFIDENTIALITY NOTICE ===================== This email message and any attachments are for the exclusive use of the...
   Author: Sanjay Subramanian, 2013-05-31, 21:02
Re: Update statment on Hive - Hive - [mail # user]
...Hi Hive reads and writes to HDFSŠand by definition HDFS is write once and immutable after that. So like an RDBMS there is no concept of an update rows. However if u want to delete some recor...
   Author: Sanjay Subramanian, 2013-05-31, 20:04
Re: how does hive find where is MR job tracker - Hive - [mail # user]
...In Cloudera Manager , there is a Safety Valve feature (its a multiline text widget) that u can use to input the XML properties that u would use for mapred-site.xml  Possibly since u cha...
   Author: Sanjay Subramanian, 2013-05-28, 17:08
Re: How to look at the metadata of the tables we have created. - Hive - [mail # user]
...I have an earlier version ER diagram of Hive….There are not too many tables and u can navigate to them and poke around easily  For example I created a hive locations alias for myself (a...
   Author: Sanjay Subramanian, 2013-05-24, 23:00
[expand - 1 more] - Re: hive.log - Hive - [mail # user]
...Ok figured it out  -  vi  /etc/hive/conf/hive-log4j.properties  - Modify this line #hive.log.dir=/tmp/${user.name} hive.log.dir=/data01/workspace/hive/log/${user.name} &n...
   Author: Sanjay Subramanian, 2013-05-23, 23:32
[expand - 1 more] - Re: Hive tmp logs - Hive - [mail # user]
...Clarification This property defines a file on HDFS    hive.exec.scratchdir    /data01/workspace/hive scratch/dir/on/local/linux/disk      From: Sanjay Subr...
   Author: Sanjay Subramanian, 2013-05-23, 21:55
[expand - 1 more] - Re: io.compression.codecs not found - Hive - [mail # user]
... io.compression.codecs org.apache.hadoop.io.compress.DefaultCodec,org.apache.hadoop.io.compress.GzipCodec,org.apache.hadoop.io.compress.BZip2Codec,org.apache.hadoop.io.compress.SnappyCo...
   Author: Sanjay Subramanian, 2013-05-23, 16:51
[expand - 1 more] - Re: Snappy with HIve - Hive - [mail # user]
...Thanks Bejoy…I tracked down the issue..there was an earlier table (with leo definition) that I had not dropped and recreated - hence giving input snappy to that was giving issues Regards san...
   Author: Sanjay Subramanian, 2013-05-23, 16:49
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