Phobos has the following machines at RCF for computing:
Number | Processor | Clock Speed | Manu. | RAM/CPU MB |
Local Disk/Node (GB) |
O/S |
IP Address |
69 | Dual Pentium III |
1000 MHz |
IBM | 256 | 144 (2x72 SCSI) |
RH6.1 |
rcrs4075->rcrs4138 |
46 | Dual Pentium III | 800 MHz | VA Linux | 256 | 110 (4x30IDE) |
RH6.1 |
rcrs4030->rcrs4074 |
29 | Dual Pentium III | 450 MHz | VA Linux | 256 |
110 (4x30IDE) |
RH6.1 | rcrs4001->rcrs4029 |
5 | Quad Pentium-Pros | 200 MHz | ASL | 256 | 26 (2x18SCSI) |
RH6.1 | rcas4001->rcas4005 |
4 | Dual Pentium-II's | 400 MHz | IBM | 256 | 50 (2x30IDE) |
RH6.1 | rcas4006->rcas4009 |
The machines are grouped into 2 broad categories.
Because Phobos requires more computing power than $$ can buy, efficient use of computing resources is essential. To this end, the current set up of machines, has each machine capabile of being either a CRS or CAS machine. Of course, with flexibility comes complexity, the following describes the more complicated(but more efficient) setup than was previously implemented.
CRS Queue Number | 5 | 4 | 3 | 2 | 1 |
LSF Queues | phcrs_lo | phcrs_hi phcrs_med phcrs_lo |
phcas_hi phcas_med phcas_lo |
phslow_hi phslow_med phslow_lo |
|
Number Of Nodes | 32 | 32 | 23 | 22 | 29 |
Clock Speeds(MHz) | 1000 | 1000 | 800 | 800 | 450 |
IP addresses | rcrs4107-138 | rcrs4075-4106 | rcrs4052-74 | rcrs4030-51 | rcrs4001-4029 |
Purpose | Primary purpose for CRS machine type processing. (Reconstruction) If necessary,or CRS underutilized, CAS machines. |
Primary purpose for CRS machine type processing/overflow. If CRS requires more power, will use these machines, otherwise available to CAS users. CRS has priority. Generally used for MC/template generation if not used for reconstruction | Primary purpose for user analysis + MC/template generation. If required for CRS processing can be used (generally unavialable to CRS) | Primary purpose for user analysis. If required for CRS processing can be used (generally unavialable to CRS) | Primary purpose for user analysis. If required for CRS processing can be used (generally unavialable to CRS) |
Authorization Required to use as CRS | Yes, std permission. | Yes, special permission | Yes, exceptional circumstances | Yes, exceptional circumstances | Yes, exceptional circumstances |
Authorization Required to use as CAS | Yes, exceptional circumstances | Yes, general circumstances | No | No | No |
There are 5 queues:
For how to use the CRS farm click here.
There are many queues on "CAS". The queues, phXXX_YY, are defined by the group of machines(XXX) that they use(of single speed), and by the length of time(YY) they can run. The full description of the queues is given.
LSF Queue Name | CRS Equivalent Queue No. | Machine IP addresses | Time/user | No. Jobs /user | Nice | Queue Priority |
phcrs_hi | 4 | rcrs4075-4106 | 6 hrs | 10 | 5 | 40 |
phcrs_med | 4 | rcrs4075-4106 | 24hrs | 50 | 10 | 30 |
phcrs_lo | 4+5 | rcrs4075-4138 | unlimited | unlimited | 20 | 10 |
phcas_hi | 2+3 | rcrs4030-4074 | 6hrs | 10 | 1 | 40 |
phcas_med | 2+3 | rcrs4030-4074 | 24 hrs | 50 | 6 | 30 |
phcas_lo | 2+3 | rcrs4030-4074 | unlimited | unlimited | 11 | 10 |
phslow_hi | 1 | rcrs4001-4029 | 6 hrs | 10 | 0 | 40 |
phslow_med | 1 | rcrs4001-4029 | 24 hrs | 50 | 5 | 30 |
phslow_lo | 1 | rcrs4001-4029 | unlimited | unlimited | 10 | 10 |
phobos_int_phast | Special | rcas4011-4015 | 1.5 hrs | 3 | 5 | 50 |
phobos_int | Special | Interactive Machines (rcas4001-10) |
1.5 hrs | 2 | 5 | 50 |
Queue priority: Highest number, is the queue whose jobs go onto available nodes first.
For how to use the LSF queue click here.
Slower machines, rcas4001-4005(200MHz)+rcas4006-4009(400MHz)+rcas4010(800MHz)
To login, at gateway, type
> ssh rcas40XX [ENTER] (where
XX=00-10)
To run interactively on the interactive queues (phobos_int_phast, phobos_int) for fast
compiles/quick processing, type
>bsub -q phobos_int -Is tcsh [ENTER] (or
phobos_int_phast)
this gives an interactive shell that you can use on the faster machine. Run your phat
compile, or quick test and then log out.
How to run a job via LSF on a specific node:
bsub -m "hostname" script
(for LSF/bsub options do man bsub etc)
This page is maintained by Nigel George.
Last Edited: Friday, September 21, 2001 17:03