Fault Tolerant IceStorm

in Help Center
Hello,
I'm new with ICE. I was used TAO Middleware in other projects.
Now I'm researching ICE middleware and testing ICEStorm.
In TAO Notify Service implementation, I have 2 kinds of fault tolerance
1- Connections Fault Tolerance. That permits that publishers, subscriber and service, restore all the information that need for reconnect to all participants.
For example, if a I have one subscriber and one publisher and the service of course. If I shutdown any of this application and later this application run again, all works like the first time.
Notify persist all the info of proxys, topics, etc.
I need shutdown any application and then when I restart this application all work like the first time.
I don't not need load balancer only this kind of fault tolerance.
2-Events loss tolerance. TAO Notifiy persist events sent for subscribers, Then if any application restart then service dispatch to all subscribers.
Can I use these options with ICEStorm o other components?
I run test and don't work with fault tolerance.
Thanks for all.
Moisés
I'm new with ICE. I was used TAO Middleware in other projects.
Now I'm researching ICE middleware and testing ICEStorm.
In TAO Notify Service implementation, I have 2 kinds of fault tolerance
1- Connections Fault Tolerance. That permits that publishers, subscriber and service, restore all the information that need for reconnect to all participants.
For example, if a I have one subscriber and one publisher and the service of course. If I shutdown any of this application and later this application run again, all works like the first time.
Notify persist all the info of proxys, topics, etc.
I need shutdown any application and then when I restart this application all work like the first time.
I don't not need load balancer only this kind of fault tolerance.
2-Events loss tolerance. TAO Notifiy persist events sent for subscribers, Then if any application restart then service dispatch to all subscribers.
Can I use these options with ICEStorm o other components?
I run test and don't work with fault tolerance.
Thanks for all.
Moisés
0
Comments
Welcome to our forums! As of Ice 3.2.x, IceStorm persists only topics (and links between topics); it does not store subscribers persistently. So, if when you restart your IceStorm server, your subscribers need to resubscribe.
IceStorm does not store any message (event) persistently. If a message cannot be delivered to a subscriber, for example because the subscriber is down or unreachable, IceStorm won't store the message for later delivery.
We will most likely add subscriber persistence and various other features to IceStorm for the next Ice release. However at this point we have no plan to add message persistence to IceStorm.
Best regards,
Bernard
Thanks very much for your answer.
Then the idea is that subscriber detect that the service is restarted to make a topic subscription again.
Subscribers can obtain the state of IceStorm?
IceStorm Service send a message for subscribers informing that service start again? Maybe some asynchronism mechanism.
Thanks again
Moises
The next version of Ice will have an IceStorm built-in mechanism to avoid having to do this.
Thanks again
Maybe I make my own monitor application that send heartbeat message and all subscribers can know when IceStorm is down.
Thanks for a good project....
Moisés