- **status**: review --> fixed
- **Comment**:
changeset: 5578:80f9493def7e
tag: tip
user: A V Mahesh <[email protected]>
date: Thu Aug 14 14:45:05 2014 +0530
summary: imm: tune imm macros according to mds mcast size [#851]
changeset: 5577:fd9b07b46fe5
user: A V Mahesh <[email protected]>
date: Thu Aug 14 14:43:47 2014 +0530
summary: mds: use TIPC multicast for MDS broadcast [#851]
multicast_n_way_support.patch
=================================================================================
mds: support multicast for n_way configuration [#851]
- The existing Opensaf Broadcast message was implemented such that the Bcast
messes will be send to
only the active subscribers as multiple unicast, assuming that the
subscription list may have n_way_active & n_way.
- But currently we don't have any n_way configuration in the current Opensaf
middle ware ,
and so far we didn't come across such n_way configuration application.
- In case of Multicast Messaging TIPC to send a copy of the message to every
port in the sender's cluster
irrelevant of role of the subscriber ( assuming application will filter it
based on active/standby)
- So to match existing Opensaf Broadcast message , i am providing this Option
patch as well.
- If this is required we will push this optional patch ,
so attaching `multicast_n_way_support.patch` to ticket for future use when we
will suppor n_way .
Code changes :
Before sending the Multicast Messaging , query the subscribers for any
standby exist (n_way subscribers list) ,
if (if standby exist) send old type Broadcast message as multiple unicast
only to actives , else
in the case of n_way_active configuration sends Multicast Message.
================================================================================
---
** [tickets:#851] MDS: use TIPC multicast**
**Status:** fixed
**Milestone:** 4.5.FC
**Created:** Mon Apr 14, 2014 09:31 AM UTC by Hans Feldt
**Last Updated:** Thu Aug 07, 2014 09:03 AM UTC
**Owner:** A V Mahesh (AVM)
MDS broadcast is implemented as multiple unicasts. This does not scale and adds
unnecessary load to the sending process.
MDS broadcast should use TIPC multicast.
Attached is a hack that does this. It can be used to measure performance
improvements.
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