ECE Dept. - Number of CentOS Client Users - 2012 to Nov 2019

Six Years

One year after switching from CentOS to Ubuntu as the primary server OS.

eceTesla* and eceUbuntu* are Ubuntu and eceLinux* are CentOS.

Note: eceTesla0 was using CentOS for Winter 2019 before being switched to Ubuntu in Summer 2019 and an Ubuntu VM existed before this switchover for about three years.

eceLinux1/2/3 started as 6-core AMD FX processors and were upgraded to 8-core which were replaced by 4-core i7's that had ~30% faster single threaded performance ~2016.

system load number of users

ECE Dept. - Unix Client Users - 2005 to May 2011

This data reaches from 2005 to May 2011. It is a snapshot taken one year after our transition from Solaris Unix to CentOS Linux.

ECEUnix was a 12 processor Sun 4500 running at 366MHz.

Skynet (aka Harshrealm) was a Sun 6500 with 30 processors at 366MHz each.

Six Years

system load number of users

Code to print 6 years of graphs for the move from CentOS to Ubuntu

rrdtool graph UnixUsers-yr6-CentOS.png -w 700 -h 170 -s 1383657420 --title="Number of Users at Nov 2019" DEF:ecetesla1=ecetesla1_users.rrd:load:AVERAGE AREA:ecetesla1#20F080:"eceTesla1" DEF:eceubuntu1=eceubuntu1_users.rrd:load:AVERAGE STACK:eceubuntu1#20F080:"eceubuntu1" DEF:eceubuntu2=eceubuntu2_users.rrd:load:AVERAGE STACK:eceubuntu2#20F080:"2" DEF:eceubuntu3=eceubuntu3_users.rrd:load:AVERAGE STACK:eceubuntu3#20F080:"3" DEF:eceubuntu4=eceubuntu4_users.rrd:load:AVERAGE STACK:eceubuntu4#20F080:"4" DEF:ecetesla0=ecetesla0_users.rrd:load:AVERAGE STACK:ecetesla0#20F0FF:"eceTesla0" DEF:eceLinux1=eceLinux1_users.rrd:load:AVERAGE STACK:eceLinux1#2020FF:"eceLinux1" DEF:eceLinux2=eceLinux2_users.rrd:load:AVERAGE STACK:eceLinux2#2020FF:"2" DEF:eceLinux3=eceLinux3_users.rrd:load:AVERAGE STACK:eceLinux3#2020FF:"3" DEF:eceLinux4=eceLinux4_users.rrd:load:AVERAGE STACK:eceLinux4#2020FF:"4" DEF:eceLinux5=eceLinux5_users.rrd:load:AVERAGE STACK:eceLinux5#F0A0FF:"eceLinux5" DEF:eceLinux6=eceLinux6_users.rrd:load:AVERAGE STACK:eceLinux6#F0A0FF:"6" DEF:eceLinux7=eceLinux7_users.rrd:load:AVERAGE STACK:eceLinux7#F0A0FF:"7" DEF:eceLinux8=eceLinux8_users.rrd:load:AVERAGE STACK:eceLinux8#F0A0FF:"8" DEF:eceLinux9=eceLinux9_users.rrd:load:AVERAGE STACK:eceLinux9#F0A0FF:"9" DEF:eceLinux10=eceLinux10_users.rrd:load:AVERAGE STACK:eceLinux10#F0A0FF:"10" DEF:eceLinux11=eceLinux11_users.rrd:load:AVERAGE STACK:eceLinux11#F0A0FF:"11"

rrdtool graph unixclients-yr6-CentOS.png -w 700 -h 170 -s 1383657420 --title="Server Load at Nov 2019" DEF:eceubuntu1=eceubuntu1.rrd:load:AVERAGE AREA:eceubuntu1#20F080:"eceubuntu1-4" DEF:ecetesla1=ecetesla1.rrd:load:AVERAGE STACK:ecetesla1#20F080:"Tesla1" DEF:eceubuntu2=eceubuntu2.rrd:load:AVERAGE STACK:eceubuntu2#20F080:"2"  DEF:eceubuntu3=eceubuntu3.rrd:load:AVERAGE STACK:eceubuntu3#20F080:"3"  DEF:eceubuntu4=eceubuntu4.rrd:load:AVERAGE STACK:eceubuntu4#20F080:"4" DEF:eceLinux1=eceLinux1.rrd:load:AVERAGE STACK:eceLinux1#2020FF:"eceLinux1-4" DEF:ecetesla0=ecetesla0.rrd:load:AVERAGE STACK:ecetesla0#20F0FF:"tesla0" DEF:eceLinux2=eceLinux2.rrd:load:AVERAGE STACK:eceLinux2#2020FF:"2"  DEF:eceLinux3=eceLinux3.rrd:load:AVERAGE STACK:eceLinux3#2020FF:"3"  DEF:eceLinux4=eceLinux4.rrd:load:AVERAGE STACK:eceLinux4#2020FF:"4" DEF:eceLinux5=eceLinux5.rrd:load:AVERAGE STACK:eceLinux5#F0A0FF:"eceLinux5-12" DEF:eceLinux6=eceLinux6.rrd:load:AVERAGE STACK:eceLinux6#F0A0FF:"6" DEF:eceLinux7=eceLinux7.rrd:load:AVERAGE STACK:eceLinux7#F0A0FF:"7" DEF:eceLinux8=eceLinux8.rrd:load:AVERAGE STACK:eceLinux8#F0A0FF:"8" DEF:eceLinux9=eceLinux9.rrd:load:AVERAGE STACK:eceLinux9#F0A0FF:"9" DEF:eceLinux10=eceLinux10.rrd:load:AVERAGE STACK:eceLinux10#F0A0FF:"10" DEF:eceLinux11=eceLinux11.rrd:load:AVERAGE STACK:eceLinux11#F0A0FF:"11" DEF:eceLinux12=eceLinux12.rrd:load:AVERAGE STACK:eceLinux12#F0A0FF:"12"