[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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