> I'm using pgpool-II 3.0.3 and found that there is a small variation in the > server response on Linux and HP-UX. Here it is: > > $pcp_node_info -d 20 localhost 9898 edb edb 2 > > Linux: > DEBUG: send: tos="R", len=41 > DEBUG: recv: tos="r", len=21, data=AuthenticationOK > DEBUG: send: tos="I", len=6 > ! DEBUG: recv: tos="i", len=54, data=CommandComplete DEBUG: send: tos="X", > len=4 localhost 5446 3 0.333333 > > HPUX: > DEBUG: send: tos="R", len=41 > DEBUG: recv: tos="r", len=21, data=AuthenticationOK > DEBUG: send: tos="I", len=6 > ! DEBUG: recv: tos="i", len=50, data=CommandComplete DEBUG: send: tos="X", > len=4 localhost 5446 3 0.333333 > > What is "tos" here means? and why the length on line 4 differs in both the > cases?Not sure if this is something basic and I should be aware of it :) > > Thanks.
"tos" is a 1 byte character indicating what the pcp command is. For example, "I" indicates pcp client(in this case pcp_node_info command) requests info to pcp server(which is running on 9898 port by default). "i" indicates pcp server sends back the requested info to pcp client. The difference between 54 vs. 50 is interesting. In pcp_child.c around line 375: snprintf(port_str, sizeof(port_str), "%d", bi->backend_port); snprintf(status, sizeof(status), "%d", bi->backend_status); snprintf(weight_str, sizeof(weight_str), "%f", bi->backend_weight); pcp_write(frontend, "i", 1); wsize = htonl(sizeof(code) + strlen(bi->backend_hostname)+1 + strlen(port_str)+1 + strlen(status)+1 + strlen(weight_str)+1 + sizeof(int)); pcp_write(frontend, &wsize, sizeof(int)); pcp_write(frontend, code, sizeof(code)); pcp_write(frontend, bi->backend_hostname, strlen(bi->backend_hostname)+1); pcp_write(frontend, port_str, strlen(port_str)+1); pcp_write(frontend, status, strlen(status)+1); pcp_write(frontend, weight_str, strlen(weight_str)+1); I think this one could create different length of string among platforms: snprintf(weight_str, sizeof(weight_str), "%f", bi->backend_weight); Just a guess though. -- Tatsuo Ishii SRA OSS, Inc. Japan English: http://www.sraoss.co.jp/index_en.php Japanese: http://www.sraoss.co.jp _______________________________________________ Pgpool-general mailing list Pgpool-general@pgfoundry.org http://pgfoundry.org/mailman/listinfo/pgpool-general