Just an educated guess: you have materialized Views? They are known to Stream very slow
Am 08.12.2016 10:28 schrieb "Aleksandr Ivanov" <ale...@gmail.com>: > Yes, I use compression. > Tried without and it gave ~15% increase in speed, but is still too low > (~35Mbps) > > On sending side no high CPU/IO/etc utilization. > But on receiving node I see that one "STREAM-IN" thread takes 100% CPU and > it just doesn't scale by design since "Each stream is a single thread" ( > http://www.mail-archive.com/user@cassandra.apache.org/msg42095.html) > > > >> > I'm trying to decommission one C* node from 6 nodes cluster and see that >> > outbound network traffic on this node doesn't go over ~30Mb/s. >> > Looks like it is throttled somewhere in C* >> >> Do you use compression? Try taking a thread dump and see what the >> utilization of the sending threads are. >> >> >> -- >> Eric Evans >> john.eric.ev...@gmail.com >> > >
