Hi, I have a question about the http connections made between the various swift server processes. Particularly between the swift proxy server and the swift object server.
I see that these servers do not use a persistent http connection between them. So every blob get/put/delete request will create a new connection, use it and tear it down. In a highly concurrent environment with thousands of such operations happening per second, there could be two problems: i) Time required for creating the new connections could hamper performance. ii) After the requests are complete, several connections will be in the TIME_WAIT state and it might be possible that the proxy server and object server node will run out of ports or fds. If the proxy and object servers are on the same machine, the problem is exacerbated. I have one such instance and at one point saw ~30K sockets in the TIME_WAIT state. Though, this would've included connections with the account server and container server also. Does this analysis make sense? If yes, are there ways to do something about it (other than asking clients to slow down :P)? Thanks in advance. -Shri _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
