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Posted to user@hive.apache.org by Ashish Shenoy <as...@instartlogic.com> on 2015/07/30 02:22:51 UTC
Set the ORC file HDFS block size to 64MB
Hi,
I am using the OrcFile.createWriter() function to get an ORC writer to
write ORC files. However, upon inspecting the ORC files in HDFS, I notice
that they have a block size of 256MB. Now, I would like to set it to 64MB
instead.
I digged around the net and tried a few options:
- I set the "dfs.block.size" config property to 64MB and passed it to the
createWriter() call via OrcFile.writerOptions(config)
- I set the "hive.exec.orc.default.block.size" to 64MB in hive-site.xml
file via ambari and restarted hive.
Neither of these approaches worked for me. I still see that my files have a
block size of 256MB which corresponds to the default setting for the block
size for ORC files. How can I set the block size of ORC files to 64MB ?
Thanks,
Ashish
Re: Set the ORC file HDFS block size to 64MB
Posted by Prasanth Jayachandran <pj...@hortonworks.com>.
Hi
OrcFile.createWriter() methods accepts WriterOptions where you can specify the block size to use using blockSize() method.
Thanks
Prasanth
On Jul 29, 2015, at 5:22 PM, Ashish Shenoy <as...@instartlogic.com>> wrote:
Hi,
I am using the OrcFile.createWriter() function to get an ORC writer to write ORC files. However, upon inspecting the ORC files in HDFS, I notice that they have a block size of 256MB. Now, I would like to set it to 64MB instead.
I digged around the net and tried a few options:
- I set the "dfs.block.size" config property to 64MB and passed it to the createWriter() call via OrcFile.writerOptions(config)
- I set the "hive.exec.orc.default.block.size" to 64MB in hive-site.xml file via ambari and restarted hive.
Neither of these approaches worked for me. I still see that my files have a block size of 256MB which corresponds to the default setting for the block size for ORC files. How can I set the block size of ORC files to 64MB ?
Thanks,
Ashish