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 14 2011

January 14, 2011 4:50 pm EST

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

ANNOUNCEMENTS

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 run for over three months, you might wamt to wait to submit them after the power outaqge, or, if possible, submit them to egate.

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

STATISTICS

FGATE

Uptime: 1 day
/home directory usage: 81% (1.2 TB available)
/backups directory usage: 100%

LSF usage for Week 1 (1/3-1/9) (times are in minutes)
GroupJobsTotal CPUAvg CPUAvg WaitAvg Trnr.
Bredas 216 193586 10% 896 730 1805
Hernandez 135 261239 13% 1935 1094 3111
Sherrill 65 167996 9% 2585 1578 4260
Other 211 413412 21% 1959 70 2069
Total 627 1036233 54% 1653 674 2430

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

Most productive user of the Week: espt 413412.

LSF usage for Month of December (times are in minutes)
GroupJobsTotal CPUAvg CPUAvg WaitAvg Trnr.
Bredas 1640 1164622 14% 710 663 1339
Hernandez 1220 1429855 17% 1172 418 1654
Sherrill 368 585786 7% 1592 1936 5230
Other 212 639748 7% 3018 129 3191
Total 3440 3820013 45% 1110 679 1981

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

EGATE

Uptime: 81 days
/theoryfs/common directory usage: 38% (417GB available)
/theoryfs/ccmst directory usage: 87% (115 GB available)

LSF usage for Week 1 (1/3-1/9) (times are in minutes)
GroupJobsTotal CPUAvg CPUAvg WaitAvg Trnr.
Sherrill 919 1465352 97% 1595 6091 7695
Other 451 23811 2% 53 172 225
Total 1370 1489164 98% 1087 4143 5236

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

Most productive user of the Week: sahan 1143251.

LSF usage for Month of December (times are in minutes)
GroupJobsTotal CPUAvg CPUAvg WaitAvg Trnr.
Bredas 10 52434 1% 5243 77 5357
Hernandez 743 465500 7% 627 378 1023
Sherrill 7414 4683953 70% 632 2127 2864
Other 449 612608 9% 1364 877 2250
Total 8616 5814460 87% 675 1909 2676

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

TIP OF THE WEEK

By Massimo

SSH Escape Sequences

A little known fact about ssh are the escape sequences that allow you to interact with the ssh session. The ssh escape character is the ~ (tilde). This has to be typed as first character of a new line. Typing ~ followed by a number of other keystrokes allows you to do interesting things to the current ssh session (like close it; or suspend it).

For example, open an ssh session to a remote host, then press Enter a couple of times (the ~ has to be entered as the first character of a new line), then type ~?. This will display the list of escape sequences. The two handy ones are ~. (Tilde followed by period) and ~^Z (that's Tilde followed by Ctrl-Z). The first sequence (~.) closes the ssh session. This can be useful when the remote connection is lost (for instance because of network problems) and allows to close the remote session without having to kill the terminal window. The second sequence (~^Z) will put the ssh connection into the background, thus allowing to continue working on the local machine. When you are ready to resume the ssh session, just enter the command fg.

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.