Center for Computational Molecular Science and Technology Georgia Institute of Technology Center for Computational Molecular Science and Technology School of Chemistry and Biochemistry

CCMST Weekly News, January 21 2011

January 21, 2011 2:05 pm EST

1. Announcements
2. Statistics
3. Tip of the Week

ANNOUNCEMENTS

AACP Seminar Series

January 31, 2001 :30PM-9:00 PM
Emory University 316 Atwood Hall
Prof. Thomas Orlando, Georgia Tech
Particle-induced Surface Processes in the Solar System

Reminder: Planned Power Outage Scheduled for 3/26-3/27 2011

The MS&E building will be without power during the week end of 03/26-03/27 2011. As consequence, the CCMST clusters venom, fgate and the new ggate cluster will all be powered down. Any job still running by the time of the shut down will be killed. The power outage will not affect egate.

If you are planning on launching large, non restartable jobs on the CCMST clusters that are expected to be still running at the time of the outage, you might want to wait to submit them after the power outage, or, if possible, submit them to egate.

For more information please contact Massimo (massimo.malagoli@chemistry.gatech.edu).

STATISTICS

FGATE

Uptime: 7 days
/home directory usage: 80% (1.2 TB available)
/backups directory usage: 100%

LSF usage for Week 2 (1/10-1/16) (times are in minutes)
GroupJobsTotal CPUAvg CPUAvg WaitAvg Trnr.
Bredas 138 212987 11% 1543 3061 5326
Hernandez 310 95704 5% 309 126 915
Sherrill 7 96024 5% 13718 21861 42778
Other 78 239140 12% 3066 526 4460
Total 533 643855 33% 1208 1230 3126

Note: percentages refer to the total CPU time available for the period.

Most productive user of the Week: espt 238103.

EGATE

Uptime: 87 days
/theoryfs/common directory usage: 39% (406GB available)
/theoryfs/ccmst directory usage: 88% (113 GB available)

LSF usage for Week 2 (1/10-1/16) (times are in minutes)
GroupJobsTotal CPUAvg CPUAvg WaitAvg Trnr.
Bredas 22 90648 6% 4120 63 4212
Hernandez 100 220919 15% 2209 96 2413
Sherrill 5642 1109170 73% 197 1063 1261
Other 63 7619 1% 121 153 275
Total 5827 1428350 94% 245 1033 1281

Note: percentages refer to the total CPU time available for the period.

Most productive user of the Week: sahan 658583.

TIP OF THE WEEK

By Massimo

Top

The top command is a system monitor tool that produces a list of processes running on system. The list is updated at regular intervals. Top has several options and commands that allow to manipulate the list of displayed processes and to interact with the running processes. Here are some examples:

  • Sort processes by a different column. By default top sorts the processes by CPU usage. One can change the sort key while the program is running. By typing M (upper case M), the processes will be sorted by memory usage. To sort by another column, type O (capital O). This will display a list of possible columns to sort by. With R (capital R) one can reverse the sorting.
  • Kill a process: without exiting top, press k. You will be prompted for the PID of the process to kill (of course you must have the permission to kill the intended process, otherwise the operation will not have any effect)
  • Display only selected users in the top output: press u, the command will prompt you for the user name(s) to display the processes for.
  • Display only specific processes (useful to monitor a specific job without displaying any other precess): enter the command top -p pid1, pid2 ... In other words, enter top -p followed by a list of process IDs for the processes to be displayed.
  • Display all CPUs / Cores in the output. By default top displays the output for all the CPUs grouped together. To switch to individual lines for each CPU type 1.
  • Split the output into different panels. To display multiple views of the top commands press A (capital A). You can cycle through the windows by typing a. This can be used to display different views of the processes sorted by different criteria.

 

Do you have usage tips that you want to share with the other CCMST users? Please send them to Massimo (massimo.malagoli@chemistry.gatech.edu) for inclusion in the Tip of the Week section.