That's a good news if describecluster shows the same version on each node. Try
with a high timeout like 120 seconds to see if it works. Is there a VPN between
DCs? Is there room for improvement at the network level? TCP tuning, etc. I'm
not saying you won't have unreachable nodes but it's worth it if you can.
Romain
Le Mercredi 3 août 2016 15h02, Aleksandr Ivanov <ale...@gmail.com> a écrit :
The latency is high...
It is but is it really causing the problem? Latency is high but constant and
not higher than ~200ms.
Regarding the ALTER, did you try to increase the timeout with "cqlsh
--request-timeout=REQUEST_TIMEOUT"? Because the default is 10 seconds.
I use 25sec timeout (--request-timeout 25)
Apart the unreachable nodes, do you know if all nodes have the same schema
version?
"nodetool gossipinfo" shows same scheme version on all nodes.
Best,
Romain
