[Checkins] SVN: Sandbox/J1m/resumelb/src/zc/resumelb/README.txt Added status and classification sections and fixed a typo.

[jim]

Log message for revision 124546:
  Added status and classification sections and fixed a typo.
  

Changed:
  U   Sandbox/J1m/resumelb/src/zc/resumelb/README.txt

-=-
Modified: Sandbox/J1m/resumelb/src/zc/resumelb/README.txt
===================================================================
--- Sandbox/J1m/resumelb/src/zc/resumelb/README.txt	2012-03-09 20:20:36 UTC (rev 124545)
+++ Sandbox/J1m/resumelb/src/zc/resumelb/README.txt	2012-03-09 20:20:42 UTC (rev 124546)
@@ -11,7 +11,7 @@
 - has too much load (or is too slow) to be handled by a single
   process,
 
-- has a working set that is too much to large to fir in the caches
+- has a working set that is too large to fit in the caches
   used by your process, and
 
 - there is a way to classify requests so that there is little overlap
@@ -39,6 +39,34 @@
 distribution.  Resumes are managed by workers to assure that load
 balancer's have the same information about worker skills.
 
+Status
+======
+
+The current version of the load-balancer should be comnsidered
+experimental.  We're currently testing it in production.
+
+Request Classification
+======================
+
+You need to provide a request-classification function that takes a
+WSGI environment and returns a request class string.
+
+Two classifiers are built-in:
+
+host
+  The host classifier uses HTTP Host header values, normalized by
+  removing leading "www." prefixes, if present.
+
+re_classifier
+  A general classifier (factory) that applies a regular expression
+  with a ``class`` group to an environment value.
+
+  For example, to use the first step in a request URL path, you'd use
+  the following request-classifier option to one of the load-balancer
+  scripts described below::
+
+    -r 'zc.resumelb.lb:re_classifier("PATH_INFO",r"/(?P<class>[^/]+)")'
+
 Deployment
 ==========
 
@@ -199,7 +227,7 @@
   zkresumelb -LINFO 127.0.0.1:2181 /lb
 
 The above example assumes you have a ZooKeeper server running on port
-2181 and that it includes a tree that looks like:
+2181 and that it includes a tree that looks like::
 
   /lb
     /providers