CMD Stats

    From:       Wesley.Wright@uvm.edu
    Subject:     Some statistics from the CMD
    Date:     May 5, 2006 1:46:33 PM EDT
    To:       lrg@list.uvm.edu

I analyzed the login records (kept by any good unix system) for the four macintosh workstations available in the Center for Multimedia Development, Basement of Library.

First, local disk drive usage (including OS).

Mac A: Operational since January 17 — 232 GB capacity, 226 GB used
Mac B: Operational since April 6    — 232 GB capacity, 175 GB used
Mac C: Operational since April 6    — 232 GB capacity, 195 GB used
Mac D: Operational since January 17 — 148 GB capacity,  97 GB used

Total disk usage across all machines: 693 GB (or .7 terabytes)

Notes:

1) Up until late April, when people’s old captured video files started disappearing, files > 21 days old were automatically wiped from the drives. After numerous complaints, the auto-wipe feature was disabled until semester’s end. While is did cause problems, disks usage probably would be even higher right now without it

2) Note that Macs B and C have been in service only about a month, yet drives are at 75%-85% capacity

Users

153 different users accounted for 733 separate logins for a total of 1089 hours of usage, with the average session lasting 1 hours 29 minutes. 127 users used the equipment for 20 minutes or more per session. 94 different users used a machine 2 or more times. 40 different users used a machine 5 or more times.

693 GB disk divided by 153 users suggests an average requirement of 4.5 GB of disk per person.

Details, sorted first by total minutes used and again by total number of logins, are presented below.