Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
HBase >> mail # user >> Evenly splitting the table


Copy link to this message
-
Re: Evenly splitting the table
Is the number of salt keys configurable?
Do you support range scan on row keys althought hash is used?

On Thursday, March 21, 2013, Aaron Kimball wrote:

> Hi Cole,
>
> How are your keys structured? In Kiji, we default to using hashed row keys
> where each key starts with two bytes of salt. This makes it a lot easier to
> pre-split the table since you can make stronger guarantees about the key
> distribution.
>
> If your keys are "raw" text like, say, plaintext email addresses, it is
> significantly more difficult to guess the right splits a priori.
>
> cheers,
> - Aaron
>
>
>
> On Wed, Mar 20, 2013 at 3:43 PM, Ted Yu <[EMAIL PROTECTED]<javascript:;>>
> wrote:
>
> > Take a look at TestAdmin#testCreateTableRPCTimeOut() where
> > hbaseadmin.createTable() is called.
> >
> > bq. Is there a way to go about splitting the entire table without having
> > specific start and end keys?
> >
> > I don't think so.
> >
> > On Wed, Mar 20, 2013 at 3:32 PM, Cole <[EMAIL PROTECTED]<javascript:;>>
> wrote:
> >
> > > I was wondering how I can go about evenly splitting an entire table in
> > > HBase during table creation[1]. I tried providing the empty byte arrays
> > > HConstants.EMPTY_START_ROW and HConstants.EMPTY_END_ROW
> > > as parameters to the method I linked below, and got an error: "Start
> > > key must be smaller than end key". Is there a way to go about splitting
> > > the entire table without having specific start and end keys? Thanks in
> > > advance.
> > >
> > >
> > > [1]
> > >
> > >
> >
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/HBaseAdmin.html
> > > #createTable(org.apache.hadoop.hbase.HTableDescriptor, byte[], byte[],
> > int)
> > >
> > >
> >
>
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB