Hi Steven, http://www.jsoftware.com/papers/mmf.htm http://www.jsoftware.com/jwiki/Studio/Mapped%20Files
Should give you all of what appeared in the Vector article. Ken -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Steven Taylor Sent: Monday, August 01, 2011 11:52 AM To: Programming forum Subject: Re: [Jprogramming] Mapped Files Hi Bill, so in J does the OS still manage pulling parts of the file in / out of memory? optimistic case: Does 'size of viewport' mean that J takes x amount of the addressable memory, yet the OS only loads in parts relevant to the current operation? i.e. so long as you stay away from some safe threshold (say 1e9 * 0.66), you *should* be okay? In a 32 bit OS it's about 4 GB (1e_9 * 2^32 GB)? Thanks for the info Bill, Raul, and Lettow. re: JDB. I'll come back to this when I get a spare moment. I'm not sure I want to tackle a new database just yet :) re: vector article, is that available on the vector.org.uk website somewhere, or in the printed periodical? thanks, -Steven ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
