linuxdatabases.info

The “CVS HEAD” branch of Slony-I has been open for rather a while, and has rather a lot of changes in it.  ‘Tis time, now, to validate that it is generally working, so that we can, with some confidence, let it out and allow others to start criticizing any remaining issues that would prevent a release.

Today’s extra entertainment: I have added a bit of code to my test script that publishes to Twitter each time I run a test…

Well, I have a preliminary spec out, now, for CANCEL SUBSCRIPTION, as part of http://www.slony.info/bugzilla/show_bug.cgi?id=10

Doubtless it will merit some discussion before leaping into implementation.

I’m working on a “CANCEL SUBSCRIPTION” feature that has been talked about for rather a long time.  (It’s on the bug list:  http://www.slony.info/bugzilla/show_bug.cgi?id=10).

The notion is that if you have a subscription that keeps failing for some reason, we should have a way of dropping the subscription request without being forced to throw away the entire cluster configuration.  The special thing about CANCEL SUBSCRIPTION is that it needs to be able to come in and take action against events EARLIER in the event stream than itself.

In analyzing the environment of data available to CANCEL SUBSCRIPTION, it looks like it’s pretty highly constrained.  There are quite a number of cases where it should fail to do anything.