NERSCPowering Scientific Discovery Since 1974

Hopper Featured Announcements

Hopper $SCRATCH2 now available

June 21, 2011 by Helen He

$SCRATCH2 file system on Hopper is available again after the file system reformat and IO testing. Thank you very much for your patience during this work. It is lightly used compared to $SCRATCH, so you are encouraged to use this file system, especially for users who have a lot of data.

More details on various file systems available on Hopper can be found at:

Please report any problems to consult at nersc dot gov.

Read the full post

Workshop on Cray XE6 User Experiences September 27-28

June 20, 2011 by Helen He

Sandia National Laboratory and Cray Inc are hosting a Workshop on Cray XE6 User Experiences in Albuquerque, New Mexico, on September 27 -28, 2011.  The workshop will focus on:

Read the full post

Hopper batch queue boundary changes and 25% discount for reg_med

June 17, 2011 by Francesca Verdier

Effective immediately, the following changes to the Hopper batch queue boundaries (affecting reg_med, reg_short, reg_small, and low queues only) have been made, and a 25% charging discount to reg_med queue is now applied.

Read the full post

Reformatting $SCRATCH2 this Thursday -- Files DELETED

June 14, 2011 by Helen He

As announced last week, $SCRATCH2 file system on Hopper will be reformatted starting 6am Pacific time this Thursday, June 16.  ALL files will be DELETED. The file system is expected to be unavailable throughout the weekend.  There will be a short period of time for dedicated IO testing, when the batch queues will be stopped.  The login nodes will be available continuously.

We will send out another notice when $SCRATCH2 file system is available to use again.

Read the full post

Reformatting $SCRATCH2 file system next Thursday June 16th -- Files DELETED

June 10, 2011 by Helen He

Next Thursday, June 16th, we will be reformatting the $SCRATCH2 file system on Hopper and all files will be DELETED.  Thank you to the many users who have already moved files out of $SCRATCH2.  If you haven't moved your data, please make sure to back up it up to HPSS or move it to the $SCRATCH file system.

Because the reformat will occur in less than a week and we want to make sure important user data is not lost, NERSC will take a snapshot (backup) of the remaining data in $SCRATCH2 between now and Thursday.   If you write to the $SCRATCH2 file system after we take the snapshot though, your data will not be saved.  We suggest you not use the $SCRATCH2 file system until after the reformatting June 16th.

Read the full post