E852 Computing Resources
Misc. information
List of systems available for use by E852 people
| Hostname | Model | CPU | RAM | Scratch disks |
|---|
| Physgi01.phy.bnl.gov | SGI Challenge S | 1xR4400 at 175 MHz | 128 Mbytes | |
| Physgi02.phy.bnl.gov | SGI Indigo R4000 | 1xR4000 at 100 MHz | 48 Mbytes | - |
| Physgi03.phy.bnl.gov | SGI Challenge L | 8xR4400 at 250 MHz | 256 Mbytes | (see below) |
| PhyPPro0.phy.bnl.gov | Linux PC | 2xP6 at 200 MHz | 128 Mbytes | - |
| Loki.phy.bnl.gov | SGI Challenge XL | 8xR4400 at 200 MHz | 256 Mbytes | (see below) |
| mpsdaq.ags.bnl.gov | SGI 4D440 | 4xR3000 at 40 MHz | 256 Mbytes | ~5 Gbytes |
| qgs.phy.bnl.gov | SGI Indy R4600 | R4600 at 100 MHz | 48 Mbytes | - |
| a2.phy.bnl.gov | SGI Indy R4600 | R4600 at 100 MHz | 48 Mbytes | - |
| b1.phy.bnl.gov | SGI Indigo R4000 | R4000 at 100 MHz | 48 Mbytes | - |
| a0.phy.bnl.gov | SGI Indigo R4000 | R4000 at 100 MHz | 48 Mbytes | - |
| lemond.phy.bnl.gov | SGI 4D35 | R3000 at 36 MHz | 16 Mbytes | - |
List of other systems being used to process E852 data
| Hostname | Model | Mflops |
|---|
| ax61.bnl.gov | IBM RS6000/560 | 30 |
| ax62.bnl.gov | IBM RS6000/590 | 130 |
| ax63.bnl.gov | IBM RS6000/590 | 130 |
| ax64.bnl.gov | IBM RS6000/370 | 25 |
| ax67.bnl.gov | IBM RS6000/370 | 25 |
| sun2.bnl.gov | SUN Sparc 20 | - |
| sun3.bnl.gov | SUN Ultra | - |
| pro1.bnl.gov | 200 MHz Intel P6 under Solaris | - |
X terminals
A number of X terminals is available in the Physics building and in the MPS control room.
These include:
- a number of Tektronix XP338P color terminals, 19" screen, 12 Mbytes of RAM.
- a number of Tektronix XP419 color terminals, 19" screen, 12 Mbytes of RAM.
- a number of NCD19c color terminals, 19" screem, 12 Mbytes of RAM.
- a number of NCD19r black&white terminals, 19" screem, 8 Mbytes of RAM.
CPU resources
The main CPU resources are physgi03 and loki. Both systems have established CPU usage policies.
- physgi03- (contact root@physgi01 for up-to-date information)
The usage policy
states that users should run no more than 6 jobs at a time and all the jobs except one
should run at lowered priority (niced -2)
(i.e. started as '% nice -2 your-job with-arguments')
- loki- (contact D.P.Weygand for up-to-date information)
- E852 online and production analysis runs at 'nice -10'.
- "long running" user jobs should run at 'nice -10'.
- "high priority" user jobs should run at 'nice -5'.
- only "short" jobs should be run at regular priority.
Disk resources
The following disks are available for scratch storage:
Note: there are no automagic backups of scratch disks. If a disk crashes,
all the data on it will be lost.
Disk users are expected to back their data to tape themselves
as often as they deem necessary.
Tape resources
The following tape drives are available for use:
- Exabyte 8500 8mm drives, 4.0-4.5 Gbytes per tape, non-compressed.
- Exabyte 8505 8mm drives, can read and write compressed and non-compressed tapes.
- Exabyte 8500 8mm stackers with magasines for 10 tapes.
- DEC DLT2000 and Quantum DLT2000XT drives, 10-20 Gbytes per tape, compressed.
When reading E852 data tapes, make sure to always use the variable block device.
CO 1995-Aug-07
revised, CO 1995-Sep-26