[svnbook] r3869 committed - * src/en/book/ch05-repository-admin.xml...

svnbook at googlecode.com svnbook at googlecode.com
Thu Jun 30 13:49:36 CDT 2011


Revision: 3869
Author:   cmpilato at gmail.com
Date:     Thu Jun 30 11:44:34 2011
Log:      * src/en/book/ch05-repository-admin.xml
   (svn.reposadmin.basics.backends.fsfs): Lose reference to delta
     direction, and clarify a bit about the commit delay.  This
     finishes issue #18 ("1.6 change: BDB forward deltas").
http://code.google.com/p/svnbook/source/detail?r=3869

Modified:
  /trunk/src/en/book/ch05-repository-admin.xml

=======================================
--- /trunk/src/en/book/ch05-repository-admin.xml	Thu Jun 30 11:40:28 2011
+++ /trunk/src/en/book/ch05-repository-admin.xml	Thu Jun 30 11:44:34 2011
@@ -752,13 +752,11 @@
          <para>FSFS has different performance characteristics, too.
            When committing a directory with a huge number of files,
            FSFS is able to more quickly append directory entries.  On
-          the other hand, FSFS writes the latest version of a file as
-          a delta against an earlier version, which means that
-          checking out the latest tree is a bit slower than fetching
-          the full-texts stored in a Berkeley DB HEAD revision.  FSFS
-          also has a longer delay when finalizing a commit, which
-          could in extreme cases cause clients to time out while
-          waiting for a response.</para>
+          the other hand, FSFS has a longer delay when finalizing a
+          commit while it performs tasks that the BDB backend
+          amortizes across the lifetime of the commit, which could in
+          extreme cases cause clients to time out while waiting for a
+          response.</para>

          <para>The most important distinction, however, is FSFS's
            imperviousness to wedging when something goes wrong.  If a




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