pg_basebackup from new master's slave then recovery from new master. - Mailing list pgsql-general

All on 9.3beta2. Current setup:

server1 (MASTER) -> server2 (SLAVE) -> server3 (SLAVE)

server2 is hot_standby and gets WALs from server1
server3 is hot_standby and gets WALs from server2

In every recovery.conf I have:

recovery_target_timeline='latest'

Now i do switchover by touching recovery.conf's trigger_file on server2.

server1 (OLD MASTER)
server2 (NEW MASTER) -> server3 (SLAVE)

Then, I take down server1 (OLD MASTER), do fresh pg_basebackup data
from server3 (SLAVE) to server1 (OLD MASTER).

Now:

1. I edit recovery.conf on server1 to NOT point to server3 (SLAVE) but
server2 (NEW MASTER) and start server1
2. I edit recovery.conf on server2 to NOT point to server2 (NEW
MASTER) but server3 (OLD MASTER) and restart server3

I get this replication setup:

server2 (NEW MASTER) -> server2 (OLD MASTER, SLAVE) -> server3 (SLAVE)

Are these (1,2) operations safe? I did it on test environment but I
need to be sure if I won't loose any data doing such things.

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Piotr Gasidło