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 >> Question about HFile seeking


Copy link to this message
-
Re: Question about HFile seeking
On Thu, May 16, 2013 at 2:03 PM, Varun Sharma <[EMAIL PROTECTED]> wrote:

> Or do we use some kind of demarcator b/w rows and columns and timestamps
> when building the HFile keys and the indices ?
>

No demarcation but in KeyValue, we keep row, column family name, column
family qualifier, etc., lengths and offsets so the comparators on ly
compare pertinent bytes.

If you doing a prefix scan w/ row1c, we should be starting the scan at
row1c, not row1 (or more correctly at the row that starts the block we
believe has a row1c row in it...).

St.Ack
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