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HBASE-3883 book.xml / added something in schema design and FAQ about not being able to change rowkeys 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1125470 13f79535-47bb-0310-9956-ffa450edef68
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Michael Stack 2011-05-20 17:09:28 +00:00
parent cf35402980
commit 572ff1d41a
1 changed files with 17 additions and 0 deletions
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src/docbkx/book.xml
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@ -217,6 +217,15 @@ throws InterruptedException, IOException {
compactions. The number of versions may need to be increased or decreased depending on application needs. compactions. The number of versions may need to be increased or decreased depending on application needs.
</para> </para>
</section> </section>
<section xml:id="changing.rowkeys">
<title>
Immutability of Rowkeys
</title>
<para>Rowkeys cannot be changed. The only way they can be "changed" in a table is if the row is deleted and then re-inserted.
This is a fairly common question on the HBase dist-list so it pays to get the rowkeys right the first time (and/or before you've
inserted a lot of data).
</para>
</section>
</chapter> </chapter>
@ -1446,6 +1455,14 @@ hbase> describe 't1'</programlisting>
</para> </para>
</answer> </answer>
</qandaentry> </qandaentry>
<qandaentry xml:id="faq.changing.rowkeys">
<question><para>Can I change a table's rowkeys?</para></question>
<answer>
<para>
No. See <xref linkend="changing.rowkeys" />.
</para>
</answer>
</qandaentry>
<qandaentry xml:id="brand.new.compressor"> <qandaentry xml:id="brand.new.compressor">
<question><para>Why are logs flooded with '2011-01-10 12:40:48,407 INFO org.apache.hadoop.io.compress.CodecPool: Got <question><para>Why are logs flooded with '2011-01-10 12:40:48,407 INFO org.apache.hadoop.io.compress.CodecPool: Got
brand-new compressor' messages?</para></question> brand-new compressor' messages?</para></question>