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Minor book edit; added to required configurations section 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1030294 13f79535-47bb-0310-9956-ffa450edef68
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Michael Stack 2010-11-02 23:58:44 +00:00
parent 34db492b46
commit 0e4bbd2f3b
1 changed files with 27 additions and 8 deletions
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35
src/docbkx/book.xml
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@ -91,7 +91,11 @@
<para>Here is a quick guide to starting up a standalone HBase
instance, creating a table and inserting rows into a table via the
<link linkend="shell">HBase Shell</link>, and then cleaning up and shutting
down your running instance.</para>
down your running instance.
</para>
<para>Be warned that the HBase started using these
instructions is for play only. See the next section for how to
set up a non-toy HBase deploy.</para>
<listitem>
<para>Download and unpack the latest stable release.</para>
@ -217,13 +221,12 @@ hbase(main):013:0&gt; drop 'test'
<para><programlisting>$ ./bin/stop-hbase.sh
stopping hbase...............</programlisting></para>
</listitem>
</itemizedlist></para>
<para>To learn how to set up a HBase in distributed mode, see the next section.</para>
</itemizedlist>
</para>
</section>
<section xml:id="notsoquick">
<title>Not-so-quick Start</title>
<para>The HBase API overview document contains a detailed <link
xlink:href="http://hbase.apache.org/docs/current/api/overview-summary.html#overview_description">Getting
Started</link> with a list of requirements and description of the
@ -237,6 +240,13 @@ stopping hbase...............</programlisting></para>
<chapter xml:id="configuration">
<title>Configuration</title>
<para>
HBase uses the same configuration system as Hadoop.
To configure a deploy, edit a file of environment variables
in <filename>conf/hbase-env.sh</filename> -- this configuration
is used mostly by the launcher shell scripts getting the cluster
off the ground -- and then add configuration to an xml file to
do things like override HBase defaults, tell HBase what Filesystem to
use, and the location of the ZooKeeper ensemble.
</para>
<section>
@ -277,7 +287,8 @@ stopping hbase...............</programlisting></para>
<section xml:id="required_configuration"><title>Required Configurations</title>
<para>Here are some configurations you must configure to suit
your deploy.
your deploy. Failure to do so will almost certainly result in
<emphasis>data loss</emphasis>.
</para>
<section xml:id="ulimit">
<title><varname>ulimit</varname></title>
@ -290,7 +301,10 @@ stopping hbase...............</programlisting></para>
2010-04-06 03:04:37,542 INFO org.apache.hadoop.hdfs.DFSClient: Abandoning block blk_-6935524980745310745_1391901
</programlisting>
Do yourself a favor and change the upper bound on the number of file descriptors.
Set it to north of 10k. See the above referenced FAQ for how.</para>
Set it to north of 10k. See the above referenced FAQ for how. Verify this change
has taken effect by checking the first line in your HBase logs. It'll print out
the ulimit available to the running process (A frequent mistake is upping the ulimit
for a user other than the user running the HBase process).</para>
<para>To be clear, upping the file descriptors for the user who is
running the HBase process is an operating system configuration, not an
HBase configuration.
@ -309,6 +323,13 @@ stopping hbase...............</programlisting></para>
&lt;value&gt;2047&lt;/value&gt;
&lt;/property&gt;
</programlisting>
<footnote>
<para>
For background see
<link xlink:href="http://wiki.apache.org/hadoop/Hbase/Troubleshooting#A5">Problem: "xceiverCount 258 exceeds the limit of concurrent xcievers 256"</link>.
</para>
</footnote>
</para>
</section>
</section>
@ -337,8 +358,6 @@ stopping hbase...............</programlisting></para>
</section>
</section>
</section>
</chapter>