Mich Talebzadeh mailto:m...@peridale.co.uk
April 19, 2015 at 12:32
Finally this is more of a speculative question. If we have ORC files
that provide good functionality, is there any reason why one should
deploy a columnar database such as Hbase or Cassandra If Hive can do
the job as well?
user@hive.apache.orgmailto:user@hive.apache.org
Date: Sunday, April 19, 2015 at 12:32 PM
To: user@hive.apache.orgmailto:user@hive.apache.org
user@hive.apache.orgmailto:user@hive.apache.org
Subject: Orc file and Hive Optimiser
My understanding is that the Optimized Row Columnar (ORC) file format
...@hortonworks.com]
Sent: 19 April 2015 20:37
To: user@hive.apache.org
Subject: Re: Orc file and Hive Optimiser
ORC format is transparent to CBO.
Currently we are working on a new cost model which might reflect ORC's
performance advantages in optimization decisions.
Thanks
John
From: Mich
]
Sent: 19 April 2015 20:37
To: user@hive.apache.orgmailto:user@hive.apache.org
Subject: Re: Orc file and Hive Optimiser
ORC format is transparent to CBO.
Currently we are working on a new cost model which might reflect ORC’s
performance advantages in optimization decisions.
Thanks
John
From: Mich
My understanding is that the Optimized Row Columnar (ORC) file format
provides a highly efficient way to store Hive data.
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+ORC
In a nutshell the columnar storage allows pretty efficient compression of
columns on par with
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From: John Pullokkaran [mailto:jpullokka...@hortonworks.com]
Sent: 19 April 2015 20:53
To: user@hive.apache.org
Subject: Re: Orc file and Hive Optimiser
If you wish
