Questions[messaging](server)

Our company now uses Websphere MQ to facilitate communication with our business partners, but we're evaluating migration to ActiveMQ. I've read some documentation and articles and haven't found particular option we need - server-to-server connections.

Apache MQ has notion of broker networks, but as I understood it's more of a clustering then site-to-site communication.

We need to have a local message broker (AMQ server) and a remote one. Local is used by our applications and remote one is used by our partner's apps, there is a limited number of remote queues (on partner's broker) we need to put messages to and we also have some queues on our side which our partners have to put messages to. Is there a possibility to implement this workload with ApacheMQ?

From what I've read in the documentation the broker networks and distributed queues are a clustering solution to load balance messages between [geographically or otherwise] separated brokers. This presents HUGE security problems in our case.

Let's imagine we have two partners - A and B. we need to send messages to queue a.receive.q and b.receive.q on A and B respectively. From what I read A actually can subscribe to b.receive.q and vice versa. Also, if some hostile employee on our side (consider this just for the sake of risk assessment) launches local consumer on a.receive.q, messages won't be sent over the network at all (or only a fraction will be sent).

Feel free to ask questions if I'm a bit vague.

I would like to send from a server ( Windows 2008 R2) a pop up message to another Computer in the Network (Windows 7). I already enable AllowRemoteRPC in the registry of my Windows 7 system. This cmd works if I send a message from my Windows 2008 R2 Server to another Windows 2003 Server:

msg /server:vcs.view.local user1 test

or even the other way round

msg /server:20.1.1.30 user2 test

by the time I want to send a message to the Win7 sytem I got this exception: "Error 5 getting session names" Pinging to the Win7 IP works fine

Is there a way to send a message to all logged-in users on an OS X (Snow Leopard) server? Sometimes I need to reboot the server and would like to give everyone a notice of the impending reboot that gives them five minutes to log-out before I proceed.

Let's say you have 2 servers each with 8 CPU cores each.

The servers each run 8 network services that each host an arbitrary number of long-lived TCP/IP client connections.

Clients send messages to the services.

The services do something based on the messages, and potentially notify N>1 of the clients of state changes.

Sure, it sounds like a botnet but it isn't. Consider how IRC works with c2s and s2s connections and s2s message relaying.

• The servers are in the same data center.
• The servers can communicate over a private VLAN @1GigE.
• Messages are < 1KB in size.

How would you coordinate which services on which host should receive and relay messages to connected clients for state change messages?

There's an infinite number of ways to solve this problem efficiently.

• AMQP (RabbitMQ, ZeroMQ, etc.)
• Spread Toolkit
• N^2 connections between allservices (bad)
• Heck, even run IRC!
• ...

I'm looking for a solution that:

• perhaps exploits the fact that there's only a small closed cluster
• is easy to admin
• scales well
• is "dumb" (no weird edge cases)

What are your experiences?

What do you recommend?

Thanks!

Right now, a group of our employees is using Skype for group chats and conference calls. They're not using telephone numbers, just Skype user accounts.

I'd like to set up a server that will provide similar functionality that is only accessible inside the LAN.

What I'm not looking for is something to use with real telephones.

The main problem with Skype is that the Linux client is terrible and getting worse every year they don't update it. I also don't like the idea of our company data going through Skype servers (yes, I know it's encrypted).

SIP seems to be quite a pain, but there's also GnuGk and Jabber+Jingle.

Whatever it is, I'd like to also support Windows clients.

Is there anything out there that's open source and easy to administer?