[Gzz-commits] manuscripts/pointers article.rst

[Benja Fallenstein]

CVSROOT:        /cvsroot/gzz
Module name:    manuscripts
Branch:         
Changes by:     Benja Fallenstein <address@hidden>      03/11/06 10:49:42

Modified files:
        pointers       : article.rst 

Log message:
        oceanstore

CVSWeb URLs:
http://savannah.gnu.org/cgi-bin/viewcvs/gzz/manuscripts/pointers/article.rst.diff?tr1=1.170&tr2=1.171&r1=text&r2=text

Patches:
Index: manuscripts/pointers/article.rst
diff -u manuscripts/pointers/article.rst:1.170 
manuscripts/pointers/article.rst:1.171
--- manuscripts/pointers/article.rst:1.170      Thu Nov  6 10:40:02 2003
+++ manuscripts/pointers/article.rst    Thu Nov  6 10:49:42 2003
@@ -135,7 +135,8 @@
 information about past versions is not stored at all.
 
 In *OceanStore* [kubiatowicz00oceanstore]_, 
-an Internet-scale distributed data store that 
+an Internet-scale distributed data store based
+on Tapestry [zhao01tapestry]_ that 
 allows users to access their files 
 from different locations, every document has a 
 *primary replica*, a small set of servers that
@@ -149,12 +150,13 @@
 OceanStore is unique among the versioned P2P systems
 in that it implements non-destructive updates,
 allowing previous versions of documents to be accessed
-(by using their old heartbeats).
-In OceanStore, requesting a document's current version
-depends on querying its primary replica; when the primary
-replica ceases to function, the current version cannot be
-determined any longer (for some applications, this only happens
-30 seconds after the primary replica disappears).
+(by finding their old heartbeats through Tapestry).
+However, heartbeats are network-internal objects
+that do not exist at the file system interface
+presented to the user. Therefore, even in OceanStore,
+a user cannot simply download a version of a file 
+and an associated heartbeat and store them on their
+harddisk to keep the version "alive."
 
 .. [#consistencytime] Many applications
    are believed to be able to cope with looser consistency