Changes between Version 6 and Version 7 of MapGuideRfc90

Timestamp:

Apr 1, 2010, 12:10:13 AM (14 years ago)

Author:

uvlite

Comment:

--

MapGuideRfc90

@@ -36 +36 @@
 and then slice them up into the smaller tiles which get served to clients.
 
+== Issues ==
+
+Locking the threads to the implicit producer consumer scheme is complex and
+file locking seems not very efficient. To improve polling delay the Polling
+configuration value has been changed to ms semantics so we can specify 500ms.
+
+In addition a ace_condition has been implemented to get rid of the lockfiles 
+all together and further improve the response time. (LockMethod == 3)
+In addition to the standard approach with one lock per sub tile (LockMethod == 2)
+we also experimented using a single file per metatile (LockMethod == 1).
+
 == Implications ==
 
-The current approach with polling for lock files is inefficent and 
-is excaerbated by meta tiling. When using a meta tiling factor of 4,
-15 tiles will wait and poll for 1s while the meta tile is rendered
-and sliced up.
+When using a meta tiling factor of 4, 15 tiles will wait while the meta tile is rendered
+and sliced up. A most efficient locking scheme will have significant effect on this behaviour.
 
-Changing to a mutex would help
 
 == Test Plan ==