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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-800) support HTD and HCD get/set attribute in shell, Thrift, and REST interfaces
Date Thu, 07 Aug 2008 03:51:44 GMT
support HTD and HCD get/set attribute in shell, Thrift, and REST interfaces

                 Key: HBASE-800
                 URL: https://issues.apache.org/jira/browse/HBASE-800
             Project: Hadoop HBase
          Issue Type: Improvement
          Components: client, rest, thrift
    Affects Versions: 0.2.1
            Reporter: Andrew Purtell
            Assignee: Andrew Purtell
            Priority: Minor

>From Billy Pearson on hbase-users@

Hey Andrew

Do we have plans to include setMaxFileSize for the shell,thrift,rest?
So non java users can change this as needed with out having to learn java.


"Andrew Purtell" <apurtell@yahoo.com> wrote in message news:189371.9860.qm@web65516.mail.ac4.yahoo.com...
> Hello David,
> Current trunk (upcoming 0.2.0) has support for per-table metadata. See
> https://issues.apache.org/jira/browse/HBASE-42 and
> https://issues.apache.org/jira/browse/HBASE-62.
> So maybe you can set the split threshold quite low for the table in
> question?
> The default is 256MB (268435456), set globally for all tables in the HBase
> configuration as "hbase.hregion.max.filesize". However it's reasonable to
> set it as low as the DFS blocksize. The guidance for a typical HBase
> installation is to set the DFS blocksize to 8MB (8388608), instead of the
> default 64MB.
> At create time:
>  HTableDescriptor htd = new HTableDescriptor("foo");
>  htd.setMaxFileSize(8388608);
>  ...
>  HBaseAdmin admin = new HBaseAdmin(hconf);
>  admin.createTable(htd);
> If the table already exists:
>  HTable table = new HTable(hconf, "foo");
>  admin.disableTable("foo");
>  // make a read-write descriptor
>  HTableDescriptor htd =
>    new HTableDescriptor(table.getTableDescriptor());
>  htd.setMaxFileSize(83388608);
>  admin.modifyTableMeta("foo", htd);
>  admin.enableTable("foo");
> Hope this helps,
>   - Andy
>> From: David Alves
>> <dr-alves@criticalsoftware.com>
>> Subject: Region Splits
>> To: "hbase-user@hadoop.apache.org"
>> <hbase-user@hadoop.apache.org>
>> Date: Thursday, July 31, 2008, 6:06 AM
> [...]
>> I use hbase (amongst other things) to crawl some repos of infomation
>> and util now I've been using the Nutch segment generation paradigm.
>> I would very much like to skip the segment generation step using
>> hbase as source and sink directly but in order to do that I would
>> need to either allow more that one split to be generated for a
>> single region or make the regions in this particular table split
>> with much less entries than other tables.

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