1Leiden, November 20-21, 2001

OAC ASTROWISE TEAM

OAOACC

WP4: OAC BeoWulf

Hardware choice criteria:

• physical space problem

• flexible configuration

• cope with the technology transition for CPU

2Leiden, November 20-21, 2001

OAC ASTROWISE TEAM

OAOACC

WP4: OAC BeoWulf

BeoWulf arrived in Napoli on November 14th Configuration: 1 Master

8 slave nodes

1 Switch

Slave nodes configuration: cabinet 2U

MB Tyan TIGER 200T dual processor

CPU PIII 1GHz (can mount PIIIs)

RAM 512MB ECC registered

HD 40 GB IBM IDE

Network: 2 modules 100TBase

3Leiden, November 20-21, 2001

OAC ASTROWISE TEAM

OAOACC

WP4: OAC BeoWulfMaster configuration:

• cabinet 4 U• MB TYAN Thunder HE SL dual Processor• CPU: two PIII 1 GHZ• RAM: 1 GB ECC registered• 2 HD 75 GB + 1 HD 18 GB scsi• Gigabit ethernet module

Switch:•Allied Telesyn 24 ports 100TBase•1 port Gigabit ethernet

Total cost:14 KEU + tax

4Leiden, November 20-21, 2001

OAC ASTROWISE TEAM

OAOACC

WP4: OAC BeoWulf

Software•OS: LINUX 7.2 kernel 2.4.7-10•Administration: OSCAR 1.1

5Leiden, November 20-21, 2001

OAC ASTROWISE TEAM

OAOACC

Some results with BeoWulf at ESO

• To create a Master Bias out of 5 raw WFI images using

a special designed eclipse recipe: 68 sec

• To create a Master Flat-Field out of 5 raw dome-flats

and 5 sky-flats: 390 sec

• To obtain a catalogue of identified standard stars from a raw

Landolt field (i.e. including astrometric calibration): 140 sec

• The same for 1 CCD extension processed on one node: 88 sec