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From "Doug Meil (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-1991) Architectural overview of HBase internals with description of conceptual gulf between HBase and HDFS
Date Thu, 14 Apr 2011 20:37:06 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Doug Meil resolved HBASE-1991.
------------------------------

      Resolution: Duplicate
    Release Note: Implemented in a recent book.xml fix (FAQ section)

> Architectural overview of HBase internals with description of conceptual gulf between
HBase and HDFS
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-1991
>                 URL: https://issues.apache.org/jira/browse/HBASE-1991
>             Project: HBase
>          Issue Type: Improvement
>          Components: documentation
>    Affects Versions: 0.20.0
>            Reporter: Doug Meil
>
> One of the conceptual gulfs that needs addressing in HBase documentation is that if people
are looking at the Hadoop website, they will read about HDFS that it is for (paraphrasing)
"high throughput but does not promise low latency and is not suited for random reads."
> HBase runs on top of HDFS, and it promises both low-latency *and* random reads.
> How?
> I'm not disputing that HBase does it...  but not much is written down anywhere other
than references to "caching."
> Lars George put together a great page on some of the HBase file structures as they are
stored in HDFS.  Information like that would be useful to have in the HBase documentation,
etc.

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