It includes 294,912 processor cores, 144 terabyte memory, 6 petabyte storage in 72 racks. DW appliances are marketed for data volumes in the terabyte to petabyte range. Imperial War Museum holds around a half of petabyte of digitised data (as of 2017). DataDirect Networks are providing 1 petabyte of high-performance storage over a parallel file system. The largest publicized Objectivity/DB installation, at SLAC's BaBar experiment, stored over a Petabyte of objects. A petabyte is 10 bytes of digital information. This produces a total of 1 petabyte of raw data per second. The simulation required 1 Petabyte of storage. Storage for the holdings will be on a three petabyte server provided by EMC. Teradata installed the first petabyte class RDBMS based system in 2007. On October 19, 2008, isoHunt passed the 1 petabyte mark for torrents indexed globally. The unit symbol for the petabyte is PB.