[
https://issues.apache.org/jira/browse/HBASE-15273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15147512#comment-15147512
]
Dinesh S. Atreya commented on HBASE-15273:
------------------------------------------
{panel:title=MVCC Counter based}
Sample is given below for illustration.
|| Data ID || Activity || Data Create Counter || Data Expiry Counter ||
Comments ||
| 1 | Insert | 40 | MAX_VAL | Conventionally MAX_VAL is
null.
In order to maintain update size, MAX_VAL is pre-seeded for our purposes. |
| 1 | Delete | 40 | 47 | Marked as delete when current counter
was 47. |
| 2 | Update (old Delete) | 64 | 78 | Mark old data is DELETE |
| 2 | Update (new insert) | 78 | MAX_VAL | Insert new data. |
{panel}
> Advance Hadoop Architecture (AHA) - Advance HBase (Umbrella) JIRA
> -----------------------------------------------------------------
>
> Key: HBASE-15273
> URL: https://issues.apache.org/jira/browse/HBASE-15273
> Project: HBase
> Issue Type: New Feature
> Reporter: Dinesh S. Atreya
>
> Link to Umbrella JIRA
> https://issues.apache.org/jira/browse/HADOOP-12620
> See
> https://issues.apache.org/jira/browse/HADOOP-12620?focusedCommentId=15046300&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15046300
> for more details.
> This JIRA is an umbrella (parent/master) JIRA for advancing HBase given
> https://issues.apache.org/jira/browse/HDFS-9607.
> This JIRA contemplates on enhancing HBase to support HBase updates subsequent
> to https://issues.apache.org/jira/browse/HDFS-9607. Following benefits are
> estimated to accrue in the following dimensions with the addition of HBase
> updates
> * Performance and Efficiency -- HBase updates will have a direct impact on
> performance and efficiency by reducing the number of duplicate data since the
> existing data can be updated.
> * Availability -- Minimize or eliminate Compactions. When compactions are
> needed to be done, they can be done in a transparent manner in the
> background.
> In addition MVCC capability can be added in due course.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
