Status of NGAS Project December 2004:
-In operation since July
2001.
-Used heavily on a daily
basis by archive operators in Garching.
-Data archived daily at La
Silla, Paranal and at ESO HQ.
-Data archived directly into
NGAS Archive in Garching from Paranal and Cambridge/WFCAM.
-Some statistics:
-Total number of nodes:
~25.
-Total number of disks in
use: ~260.
-Total number of files in
NGAS Archive: ~1,500,000.
-Amount of compressed data in
NGAS Archive: ~27 TB.
-Amount of uncompressed data
in NGAS Archive: ~45 TB.
-Maximum throughput per node
(archiving): ~400 GB/24 hours (including compression).
-Major Issues to
Address:
-Need to invest more
resources in implementing automatic tests in particular for testing robustness
and handling of abnormal conditions.
-Need to implement resources
in implement an enhanced user interface - not very user-friendly at the
moment.
-Need to update the design
document to reflect present status of system (not updated since it was written
SPRING 2001).
-Should investigate improved
ways of ensuring data consistency and means for recovering lost data.