fail over and writing files

[atifaj]

suppose I am writing my data in a file on one machine (server1) then fail-over occur and dispatcher moves the request to the machine 2. Now what will happen to the data that I was writing in a file on server (machine1) ?

Also consider the same scenario in terms of logging of different actions in a file. Will it make two logs on two different machines (if cluster spans on two machines)

[slaboure]

Well, that's not a clustering issue, the result will depend on what you do in *your* code. Or I don't understand your point.

Cheers,


sacha

[atifaj]

Well I try to clearfy my question

lets see we need to have application running on server A and I am logging some activities on server A. Now to remove the fail-over issue I make cluster and deploy the application on server B.

Now my questions are:

When I will start the application does log will be generated on both servers (A and B) or only A.

If answer is only on A then during failover of A. How can I ensure that log be produce on a single file.

I hope I you understand my question.

Thanks

[slaboure]

Well, it is really up to you to use the clustering framework so that it fits your requirements: read the doco, especially the ReplicantManager and HAPartition part. You will easily find a way to implement a "flip-flap" behaviour where you are sure that only node works at a given time.