Merge r1766160 from trunk:

[apache] / ROADMAP

diff --git a/ROADMAP b/ROADMAP
index b7ad575dcd51ddf83444429fb12ba9e960d7fcd5..4c8078002e9725d7f11923879167a976e634a729 100644 (file)
--- a/ROADMAP
+++ b/ROADMAP
@@ -1,8 +1,10 @@
-APACHE 2.x ROADMAP:
+APACHE 2.x ROADMAP
+==================
+Last modified at [$Date$]

 
 

-Last modified at [$Date: 2002/10/01 16:51:10 $]

 
 

-DEFERRRED FOR APACHE 2.1
+WORKS IN PROGRESS
+-----------------

 
     * Source code should follow style guidelines.
       OK, we all agree pretty code is good.  Probably best to clean this
 
     * Source code should follow style guidelines.
       OK, we all agree pretty code is good.  Probably best to clean this


@@ -26,22 +28,9 @@ DEFERRRED FOR APACHE 2.1
           dislike a bit within that doc, bring it up on the dev@httpd
           list prior to the next branch.
 
           dislike a bit within that doc, bring it up on the dev@httpd
           list prior to the next branch.
 

-
-WORKS IN PROGRESS (PERHAPS DEFERRED FOR 2.1 or 3.0)
-
-    * revamp the input filter syntax to provide for ordering of
-      filters created with the Set{Input|Output}Filter and the
-      Add{Input|Output}Filter directives.  A 'relative to filterx' 
-      syntax is definately preferable.
-
-    * Platforms that do not support fork (primarily Win32 and AS/400)
-      Architect start-up code that avoids initializing all the modules 
-      in the parent process on platforms that do not support fork.
-
-    . Better yet - not only inform the startup of which phase it's in,
-      but allow the parent 'process' to initialize shared memory, etc,
-      and create a module-by-module stream to pass to the child, so the
-      parent can actually arbitrate the important stuff.
+      So Bill sums up ... let's get the code cleaned up in CVS head.
+      Remember, it just takes cvs diff -b (that is, --ignore-space-change)
+      to see the code changes and ignore that cruft.  Get editing Justin :)

 
     * Replace stat [deferred open] with open/fstat in directory_walk.
       Justin, Ian, OtherBill all interested in this.  Implies setting up
 
     * Replace stat [deferred open] with open/fstat in directory_walk.
       Justin, Ian, OtherBill all interested in this.  Implies setting up


@@ -65,13 +54,15 @@ WORKS IN PROGRESS (PERHAPS DEFERRED FOR 2.1 or 3.0)
            available for the life of the request, so a complete 
            async implementation would need to happen 3.0 release.
 
            available for the life of the request, so a complete 
            async implementation would need to happen 3.0 release.
 

-    * Add a string "class" that combines a char* with a length
-      and a reference count.  This will help reduce the number
-      of strlen and strdup operations during request processing.
-      Including both the length and allocation will save us a ton 
-      of reallocation we do today, in terms of string manipulation.
-
-        OtherBill asks if this is really an APR issue, not an HTTPD issue?
+        Brian notes that async writes will provide a bigger
+        scalability win than async reads for most servers.
+        We may want to try a hybrid sync-read/async-write MPM
+        as a next step.  This should be relatively easy to
+        build: start with the current worker or leader/followers
+        model, but hand off each response brigade to a "completion
+        thread" that multiplexes writes on many connections, so
+        that the worker thread doesn't have to wait around for
+        the sendfile to complete.

 
 
 MAKING APACHE REPOSITORY-AGNOSTIC
 
 
 MAKING APACHE REPOSITORY-AGNOSTIC


@@ -113,7 +104,15 @@ MAKING APACHE REPOSITORY-AGNOSTIC
               should get fully resolved. None of this "resolve to
               <here> and then we have a magical second resolution
               (inside the CGI script)" or somesuch.
               should get fully resolved. None of this "resolve to
               <here> and then we have a magical second resolution
               (inside the CGI script)" or somesuch.

-    
+   
+      Justin: Well, let's consider mod_mbox for a second.  It is sort of
+              a virtual filesystem in its own right - as it introduces
+              it's own notion of a URI space, but it is intrinsically
+              tied to the filesystem to do the lookups.  But, for the
+              portion that isn't resolved on the file system, it has
+              its own addressing scheme.  Do we need the ability to
+              layer resolution?
+

     * The translate_name hook goes away
 
       Wrowe altogether disagrees.  translate_name today even operates
     * The translate_name hook goes away
 
       Wrowe altogether disagrees.  translate_name today even operates


@@ -140,7 +139,9 @@ MAKING APACHE REPOSITORY-AGNOSTIC
       should be exposed, from the core, for other file-based stores to 
       share. Consider an archive store where the layers become 
       <Directory path> -> <Archive store> -> <File name>
       should be exposed, from the core, for other file-based stores to 
       share. Consider an archive store where the layers become 
       <Directory path> -> <Archive store> -> <File name>

-    
+   
+      Justin: How do we map Directory entries to Locations?
+ 

     * The "Location tree" is an in-memory representation of the URL
       namespace. Nodes of the tree have configuration specific to that
       location in the namespace.
     * The "Location tree" is an in-memory representation of the URL
       namespace. Nodes of the tree have configuration specific to that
       location in the namespace.


@@ -190,7 +191,7 @@ MAKING APACHE REPOSITORY-AGNOSTIC
       than calling apr_dir_open/read/close(), a caller uses
       resource->repos->get_children() or somesuch.
 
       than calling apr_dir_open/read/close(), a caller uses
       resource->repos->get_children() or somesuch.
 

-      Note that things like mod_dir, mod_autoindex, and mod_negotation
+      Note that things like mod_dir, mod_autoindex, and mod_negotiation

       need to be converted to use these mechanisms so that their
       functions will work on logical repositories rather than just
       filesystems.
       need to be converted to use these mechanisms so that their
       functions will work on logical repositories rather than just
       filesystems.


@@ -216,3 +217,13 @@ MAKING APACHE REPOSITORY-AGNOSTIC
               it? eeewwwww...
               
               I'll vote -0.9 for CGIs as a filter. Keep 'em handlers.
               it? eeewwwww...
               
               I'll vote -0.9 for CGIs as a filter. Keep 'em handlers.

+
+      Justin: So, do we give up executing CGIs from virtual repositories?
+              That seems like a sad tradeoff to make.  I'd like to have
+              my CGI scripts under DAV (SVN) control.
+
+    * How do we handle overlaying of Location and Directory entries?
+      Right now, we have a problem when /cgi-bin/ is ScriptAlias'd and
+      mod_dav has control over /.  Some people believe that /cgi-bin/
+      shouldn't be under DAV control, while others do believe it
+      should be.  What's the right strategy?