[Spread-users] Membership message vs regular message

[Guo, Yanchao]

Thanks Yair. Some comments:

1: So you are saying that if the group_membership is set to 1, then the
publisher don't have to join the group to receive the membership
message? 
2: I depoly my server outside my LAN and client inside my LAN. To test
the failure detection, I tried two things:
	a: pull out the network cable from the machine that my client is
running on. In this case, both server and client is not able to receive
any notification, but we I put in the cable, I received all the messages
published in that interval;
	b: I reset the gateway of my LAN. In this case, client doesn't
receive any notification. I can't check my server as I lost all ssh
session. 

	In both cases, do you expect spread to detect the failure? In
general, how to track the failure? I am tracking the
Is_caused_network_mess messsage, is that the right way? 

Thanks. 
Yanchao

-----Original Message-----
From: Yair Amir [mailto:yairamir at cs.jhu.edu] 
Sent: Friday, February 19, 2010 5:46 PM
To: Guo, Yanchao
Cc: spread-users at lists.spread.org
Subject: Re: [Spread-users] Membership message vs regular message

Hi,

If you have only a single publisher you can use the self-discard flag
and then publisher will not receive its own messages.

If you have more than one publisher, you can maintain a second group
where publishers as well as receivers join (but no message is sent) to
keep track of the membership of the main group.

Also - I think there is a slight inaccuracy in previous posts - Spread
will detect failures even if you are not sending traffic if you run a
daemon on the failed (or partitioned) machine and connect locally.
My understanding is that he only case where Spread does not immediately
detect a failure is in certain setups where you have a client that
connects to Spread remotely via TCP (with a remote daemon) and the
client machine is partitioned.
This is a TCP/socket issue rather than a Spread issue.

Cheers,

	:) Yair.

On 2/19/10 2:29 AM, Guo, Yanchao wrote:
> Hi all, for my publisher application, I want it got notification when 
> some listeners joined the group. To do that, my publisher application 
> have to join the same group and receive messages. But the message the 
> publisher receives include both membership message and regular
message.
> 
> How can I configure my publisher application to only receive 
> membership messages?
> 
> Thanks.
> Yanchao
> 
> 
> DISCLAIMER: This e-mail message and any attachments are intended
solely for the use of the individual or entity to which it is addressed
and may contain information that is confidential or legally privileged.
If you are not the intended recipient, you are hereby notified that any
dissemination, distribution, copying or other use of this message or its
attachments is strictly prohibited. If you have received this message in
error, please notify the sender immediately and permanently delete this
message and any attachments. 
> 
> 
> 
> ----------------------------------------------------------------------
> --
> 
> _______________________________________________
> Spread-users mailing list
> Spread-users at lists.spread.org
> http://lists.spread.org/mailman/listinfo/spread-users
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/ms-tnef
Size: 3861 bytes
Desc: not available
Url : http://lists.spread.org/pipermail/spread-users/attachments/20100219/d5febf42/attachment.bin