Author: dmeil
Date: Thu Feb 9 19:45:06 2012
New Revision: 1242482
URL: http://svn.apache.org/viewvc?rev=1242482&view=rev
Log:
hbase-5367. book.xml - minor formatting in Arch/Region/Store compaction
description
Modified:
hbase/trunk/src/docbkx/book.xml
Modified: hbase/trunk/src/docbkx/book.xml
URL:
http://svn.apache.org/viewvc/hbase/trunk/src/docbkx/book.xml?rev=1242482&r1=1242481&r2=1242482&view=diff
==============================================================================
--- hbase/trunk/src/docbkx/book.xml (original)
+++ hbase/trunk/src/docbkx/book.xml Thu Feb 9 19:45:06 2012
@@ -2165,15 +2165,15 @@ myHtd.setValue(HTableDescriptor.SPLIT_PO
Important knobs:
<itemizedlist>
<listitem><code>hbase.store.compaction.ratio</code> Ratio used in
compaction
- file selection algorithm. (default 1.2F) </listitem>
+ file selection algorithm (default 1.2f). </listitem>
<listitem><code>hbase.hstore.compaction.min</code> (.90
hbase.hstore.compactionThreshold) (files) Minimum number
- of StoreFiles per Store to be selected for a compaction to
occur.</listitem>
- <listitem><code>hbase.hstore.compaction.max</code> (files) Maximum
number of StoreFiles to compact per minor compaction.</listitem>
+ of StoreFiles per Store to be selected for a compaction to occur
(default 2).</listitem>
+ <listitem><code>hbase.hstore.compaction.max</code> (files) Maximum
number of StoreFiles to compact per minor compaction (default 10).</listitem>
<listitem><code>hbase.hstore.compaction.min.size</code> (bytes)
Any StoreFile smaller than this setting with automatically be a
candidate for compaction. Defaults to
- regions' memstore flush size (134 mb). </listitem>
+ <code>hbase.hregion.memstore.flush.size</code> (64 mb). </listitem>
<listitem><code>hbase.hstore.compaction.max.size</code> (.92)
(bytes)
- Any StoreFile larger than this setting with automatically be
excluded from compaction. </listitem>
+ Any StoreFile larger than this setting with automatically be
excluded from compaction (default Long.MAX_VALUE). </listitem>
</itemizedlist>
</para>
<para>The minor compaction StoreFile selection logic is size based,
and selects a file for compaction when the file
@@ -2184,7 +2184,7 @@ myHtd.setValue(HTableDescriptor.SPLIT_PO
<title>Minor Compaction File Selection - Example #1 (Basic
Example)</title>
<para>This example mirrors an example from the unit test
<code>TestCompactSelection</code>.
<itemizedlist>
- <listitem><code>hbase.store.compaction.ratio</code> = 1.0F
</listitem>
+ <listitem><code>hbase.store.compaction.ratio</code> = 1.0f
</listitem>
<listitem><code>hbase.hstore.compaction.min</code> = 3 (files)
</listitem>>
<listitem><code>hbase.hstore.compaction.max</code> = 5 (files)
</listitem>>
<listitem><code>hbase.hstore.compaction.min.size</code> = 10
(bytes) </listitem>>
@@ -2208,7 +2208,7 @@ myHtd.setValue(HTableDescriptor.SPLIT_PO
<title>Minor Compaction File Selection - Example #2 (Not Enough
Files To Compact)</title>
<para>This example mirrors an example from the unit test
<code>TestCompactSelection</code>.
<itemizedlist>
- <listitem><code>hbase.store.compaction.ratio</code> = 1.0F
</listitem>
+ <listitem><code>hbase.store.compaction.ratio</code> = 1.0f
</listitem>
<listitem><code>hbase.hstore.compaction.min</code> = 3 (files)
</listitem>>
<listitem><code>hbase.hstore.compaction.max</code> = 5 (files)
</listitem>>
<listitem><code>hbase.hstore.compaction.min.size</code> = 10
(bytes) </listitem>>
@@ -2231,7 +2231,7 @@ myHtd.setValue(HTableDescriptor.SPLIT_PO
<title>Minor Compaction File Selection - Example #3 (Limiting Files
To Compact)</title>
<para>This example mirrors an example from the unit test
<code>TestCompactSelection</code>.
<itemizedlist>
- <listitem><code>hbase.store.compaction.ratio</code> = 1.0F
</listitem>
+ <listitem><code>hbase.store.compaction.ratio</code> = 1.0f
</listitem>
<listitem><code>hbase.hstore.compaction.min</code> = 3 (files)
</listitem>>
<listitem><code>hbase.hstore.compaction.max</code> = 5 (files)
</listitem>>
<listitem><code>hbase.hstore.compaction.min.size</code> = 10
(bytes) </listitem>>
@@ -2254,13 +2254,13 @@ myHtd.setValue(HTableDescriptor.SPLIT_PO
</section>
<section xml:id="compaction.config.impact">
<title>Impact of Key Configuration Options</title>
- <para><code>hbase.store.compaction.ratio</code>. A large ratio
(e.g., 10F) will produce a single giant file. Conversely, a value of .25F will
+ <para><code>hbase.store.compaction.ratio</code>. A large ratio
(e.g., 10) will produce a single giant file. Conversely, a value of .25 will
produce behavior similar to the BigTable compaction algorithm -
resulting in 4 StoreFiles.
</para>
- <para><code>hbase.hstore.compaction.min.size</code>. This defaults
to <code>hbase.hregion.memstore.flush.size</code> (134 mb). Because
+ <para><code>hbase.hstore.compaction.min.size</code>. Because
this limit represents the "automatic include" limit for all
StoreFiles smaller than this value, this value may need to
be adjusted downwards in write-heavy environments where many 1 or 2
mb StoreFiles are being flushed, because every file
- will be targeted for compaction, and the resulting files may still
be under the min-size and require further compaction, etc.
+ will be targeted for compaction and the resulting files may still be
under the min-size and require further compaction, etc.
</para>
</section>
</section> <!-- compaction -->
