From: Michael Vrable <mvrable@niniel.sysnet.ucsd.edu>
Date: Wed, 23 Sep 2009 00:29:32 +0000 (-0700)
Subject: Cache coherence thoughts.
X-Git-Url: https://git.vrable.net/?a=commitdiff_plain;h=e9636461ac9e6c7075ac0866f8554b947fc464ba;p=bluesky.git

Cache coherence thoughts.
---

diff --git a/lockmgr/README b/lockmgr/README
new file mode 100644
index 0000000..8a388b5
--- /dev/null
+++ b/lockmgr/README
@@ -0,0 +1,15 @@
+The BlueSky lock manager is used to coordinate access to the same
+filesystem among independent BlueSky processes.  As presently designed,
+the lock manager itself is not fault tolerant nor meant for the wide
+area.
+
+TODO: Investigate whether there are any existing tools which could be
+used instead.  Something like ZooKeeper might work, but is probably too
+heavy-weight for now.
+
+
+Objects can have small data values associated with them (i.e., version
+number associated with an inode)
+
+Cache states (for a single object):
+    MESI?