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
Accumulo >> mail # user >> How does Accumulo compare to HBase


Copy link to this message
-
Re: How does Accumulo compare to HBase
I'm not sure of all the differences, but, wrt HBase Cell Level security
(CLS)..while similar..not 100% the same.  If I understand how the HBase CLS
works it's extension to ACL system.  And that ACL is "applied" to a cell.
 In Accumulo's case, it is part of the key.  So the ramification is that in
Accumulo, you can have:

RowID, CF, CQ, VIS1, TS --> Value1
RowID, CF, CQ, VIS2, TS --> Value2

If everything is the same, including the timestamp, the visibility can
actually determine which value to return.  So, a more concrete example
would be:

XXX, METADATA, NAME, everyone,  100--> Bruce Wayne
XXX, METADATA, NAME, alfred-only,  100--> Batman

Where Alfred could/would see both "values"...but, everyone else would only
see "Bruce"

Hope that helps.

Cheers,
Aaron

PS:  this is my understanding of how HBase CLS works...based on what I have
read/interpreted.

On Mon, Jun 23, 2014 at 1:55 PM, Jianshi Huang <[EMAIL PROTECTED]>
wrote:
 
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