Changes between Version 6 and Version 7 of Extensions

Timestamp:

2007-10-18T17:23:02Z (18 years ago)

Author:

nejucomo

Comment:

--

Extensions

@@ -11 +11 @@
 
 == Extension Implementation Issues ==
+
+=== Caching Tips ===
+
+Tahoe URIs may refer to either immutable or mutable content.  URIs for immutable data are simple to cache by mapping the URI to the contents.
+
+Mutability is independent of read-only capabilities.  A read-only capability may refer to mutable content.
+
+To determine the mutability of a URI, parse the second field of the URI (delimited by ':'):
+
+ * URI:CHK:...    : immutable
+ * URI:LIT:...    : immutable
+ * URI:DIR:...    : mutable, writable
+ * URI:DIR-RO:... : mutable, not writable
+
+Note: Currently all files are immutable, and all directories are mutable, but in the future the node type (file or directory) and the mutability will be independent.  It's a bad idea to rely on the node type to determine mutability.
+
 
 === HTTP methods ===