Parallel Vector Systems

In June a terabyte of new disks were installed on the Cray J90 cluster, and in August the file systems on all the J90s were reconfigured to include these new drives.

These changes gave our clients larger temporary work directories, and the work partition is much more fault-tolerant than before--failure of a single disk does not cause any loss of user data.

A new file system to store checkpoint files improved users' I/O performance while increasing system reliability.

Two more J90 systems with 64 additional processors were scheduled for installation in January 1999 to replace the Cray C90. In use since September 1992 and the only computer to move with NERSC from Livermore to Berkeley, the C90 was decommissioned on January 1, 1999.