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https://issues.apache.org/jira/browse/HBASE-28447?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gourab Taparia updated HBASE-28447:
-----------------------------------
Description:
Right now there is no config attached to the HFile block size by which we can
override the default. The default is set to 64 KB in
HConstants.DEFAULT_BLOCKSIZE . We need a new config which can control this
value.
Since the BLOCKSIZE is tracked at the column family level - we will need to
respect the CFD value first. Also, configuration settings are also something
that can be set in schema, at the column or table level, and will override the
relevant values from the site file. Below is the precedence order we can use to
get the final blocksize value :
{code:java}
ColumnFamilyDescriptor.BLOCKSIZE > schema level site configuration overrides >
site configuration > HConstants.DEFAULT_BLOCKSIZE{code}
PS: There is one related config “hbase.mapreduce.hfileoutputformat.blocksize”
however that is specific to map-reduce jobs.
was:
Right now there is no config attached to the HFile block size by which we can
override the default. The default is set to 64 KB in
HConstants.DEFAULT_BLOCKSIZE . We need a new config which can control this
value.
Since the BLOCKSIZE is tracked at the column family level - we will need to
respect the CFD value first. Also, configuration settings are also something
that can be set in schema, at the column or table level, and will override the
relevant values from the site file. Below is the precedence order we can use to
get the final blocksize value :
ColumnFamilyDescriptor.BLOCKSIZE > schema level site configuration overrides >
site configuration > HConstants.DEFAULT_BLOCKSIZE
PS: There is one related config “hbase.mapreduce.hfileoutputformat.blocksize”
however that is specific to map-reduce jobs.
> New configuration to configure with hfile specific blocksize
> ------------------------------------------------------------
>
> Key: HBASE-28447
> URL: https://issues.apache.org/jira/browse/HBASE-28447
> Project: HBase
> Issue Type: Improvement
> Reporter: Gourab Taparia
> Priority: Critical
>
> Right now there is no config attached to the HFile block size by which we can
> override the default. The default is set to 64 KB in
> HConstants.DEFAULT_BLOCKSIZE . We need a new config which can control this
> value.
> Since the BLOCKSIZE is tracked at the column family level - we will need to
> respect the CFD value first. Also, configuration settings are also something
> that can be set in schema, at the column or table level, and will override
> the relevant values from the site file. Below is the precedence order we can
> use to get the final blocksize value :
> {code:java}
> ColumnFamilyDescriptor.BLOCKSIZE > schema level site configuration overrides
> > site configuration > HConstants.DEFAULT_BLOCKSIZE{code}
> PS: There is one related config “hbase.mapreduce.hfileoutputformat.blocksize”
> however that is specific to map-reduce jobs.
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