svn commit: r1027714 - in /qpid/trunk/qpid/cpp/src/qpid/cluster: new-cluster-active-passive.txt new-cluster-design.txt new-cluster-plan.txt

[ac...@apache.org]

Author: aconway
Date: Tue Oct 26 19:57:26 2010
New Revision: 1027714

URL: http://svn.apache.org/viewvc?rev=1027714&view=rev
Log:
Updates to new cluster design docs regarding active-passive mode.

Modified:
    qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-active-passive.txt
    qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-design.txt
    qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-plan.txt

Modified: qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-active-passive.txt
URL: http://svn.apache.org/viewvc/qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-active-passive.txt?rev=1027714&r1=1027713&r2=1027714&view=diff
==============================================================================
--- qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-active-passive.txt (original)
+++ qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-active-passive.txt Tue Oct 26 19:57:26 2010
@@ -1,6 +1,10 @@
 -*-org-*-
 * Active/passive cluster implementation
 
+The active-active cluster can be used in an active-passive mode. In
+this mode we would like the cluster to be as efficient as a strictly
+active-passive implementation.
+
 An active/passive implementation requires a subset of the active/active approach:
 - drop Queue ownership and locking
 - replicate subset of Cluster interface, don't need to know all message disposition.
@@ -18,8 +22,7 @@ Simpler implementation of broker::Cluste
 Extra requirements:
 - Passive members refuse client connections and redirect to active member.
 - Choose new active member when the active dies.
-
-Question: How best to direct clients to the correct node after failover?
+- On failover, clients keep trying till they find the active member.
 
 ** Active/active vs. active passive
 

Modified: qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-design.txt
URL: http://svn.apache.org/viewvc/qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-design.txt?rev=1027714&r1=1027713&r2=1027714&view=diff
==============================================================================
--- qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-design.txt (original)
+++ qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-design.txt Tue Oct 26 19:57:26 2010
@@ -326,6 +326,13 @@ queue replication', allowing such replic
 on a WAN say) to be initiated after the queue had already been created
 and been in use (one of the key missing features).
 
+** Optimizing the active-passive special case.
+
+In the case where all consumers of a queue are on the same broker, we
+can get better performance because we don't need to transfer ownership
+or information about acquisition. We need to optimize this case to
+perform like an active-passive mode of replication.
+
 ** Misc outstanding issues & notes
 
 Replicating wiring

Modified: qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-plan.txt
URL: http://svn.apache.org/viewvc/qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-plan.txt?rev=1027714&r1=1027713&r2=1027714&view=diff
==============================================================================
--- qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-plan.txt (original)
+++ qpid/trunk/qpid/cpp/src/qpid/cluster/new-cluster-plan.txt Tue Oct 26 19:57:26 2010
@@ -10,7 +10,8 @@ Co-existence with old cluster code and t
 Minimal POC for message delivery & perf test.
 - no wiring replication, no updates, no failover, no persistence, no async completion.
 - just implement publish and acquire/dequeue locking protocol.
-- measure performance.
+- optimize the special case where all consumers are on the same node.
+- measure performance: compare active-passive and active-active modes of use.
 
 Full implementation of transient cluster
 - Update (based on existing update), async completion etc.



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