Network Info.

jan 2007

Ao topology

16may11 - Requests to naic http daemon

The http access logs for 01jan11 thru 16may11 were checked to see who was accessing the ao http daemon.
the file lists the requestors. The file info is:

(networkId) ( number of requesting hosts) (Number of Requests from Network) (network authority name)

(host id) (number of requests from this host)

Most active requestors

Most active requestors jan11-may11
Network	Name	#hosts	# accesses
192.253.128	dns.cit.cornell.edu	3	2166558
115.195.67	hidden-master.yahoo.com	15	410740
71.249.66	ns1.google.com	43	341233
67.195.37	hidden-master.yahoo.com	4	283975
67.195.114	hidden-master.yahoo.com	13	221836
192.65.175	naic.edu	80	159859

I ignored networks with less than 1000 requests in jan-may timeperiod.

processing: xxx/http/httplog.pl

17jan07: megs/megs2 slow transfers to local network. Measure some i/o rates.

megs (ultra10) megs2 (3.2 Ghz linux) were getting slow performance. I did some rough measurements using ftp, sftp,and scp.

Megs: 192.65.176.163 connects to els0 port 12 thru a switch in phils room
Megs2 100mbit: 192.65.176.27 connects to els0 port 12 thru sam switch in phils room.
Megs2 1Gigabit: 192.65.176.27 connects to gigabit switch bottom of rack in building II 3rd floor.

cpu From	cpuTo	i/o Rate	program	Notes
aolc3	megs2	340 kb/sec	sftp

aolc6	megs2	320 kb/sec	sftp	2 times
aolc6	megs	92 kb/sec	sftp
aolc6	agauda	15 mb/sec	scp	gigabit link

megs	fusion01	92kb/sec	ftp	aolcc

megs	megs2	11 mb/sec	sftp or scp	on same 100 mbit switch in room.
megs2	megs	2.2 mb/sec	sftp or scp	on same 100 mbit switch in room
megs	megs2	160 kb/sec	scp	megs2 now on gigabit switch megs still on 100 mbit.

Trouble with 100 mbit media converter in room or in els0 port 12.
els0 port 12 had lots of collisions.

home_~phil