I've got PG 9.3 and wal-e (6.6) doing replication on a pretty basic setup 
(1 master, 1 slave, 1 read replica).

If master goes down and I switch to slave, then I also update the read 
replica to start talking to the slave. That all works fine. However, what 
are some best practices at this point? For example:

1. Should I do an immediate base backup (push) of the slave since my logs 
are now reset? 
2. Should that push live in a new directory on S3 or can it live in the 
same spot I was pushing to with master?
3. Should I also change where wal files live?
4. What should I prune?

I guess I'm looking for a little guidance for when such a situation arises. 

Thanks!

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