Sunday, September 26, 2010

How to create a file of a given size in Linux, fastly

dd if=/dev/zero of=[path to your file] bs=256K seek=[required size]/256K count=0

This will make a file of the given size, but does not fill the file with zero or anything, so the content of the file is undefined.

We will use this for volume creation in VBS-Lustre.

Thursday, September 2, 2010

New plotting component added to daily RDAHMM

We have added a new swf plotting component to the daily RDAHMM portlet, as shown in the following picture. Compared to the old plots, this new plotting component has the following advantages:

1. better point and line connections;
2. zoom-in and zoom-out in time scale;
3. slide-though along time axis;