how to keep files in memory

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Hi,
I want to write a program to do this:

keep some files in memory,such that when another program want to read the file,he should load from memory rather than from disk.

how can i do this?

Posted 14-Aug-11 5:40am

Du Sijun

Updated 14-Aug-11 5:41am

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Richard MacCutchan 14-Aug-11 13:41pm

The chances are that even if you could do this, the actual file data would end up in virtual memory and be paged out to disk so you would still be reading from a disk somewhere. This would serve little purpose and would most likely tie up system resources and make your system run slow.

Sergey Alexandrovich Kryukov 15-Aug-11 0:00am

Very good point. Also, as mbue correctly pointed out, file cache works well.
Overall, any attempts to do what OP wants would typically make things worse compared to reading files in the standard ways.
--SA

3 solutions

Solution 3

Just Create a client/server application

or may be simple RPC application

Or IPC application.

Any of them will sever your purpose

Posted 14-Aug-11 18:18pm

Mohibur Rashid

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mbue · Accepted Answer · 2011-08-14T07:26:00

Solution 1

You must not do that, the windows file cache works very well.
Otherwise you can use FileMapping objects to share memory among different processes.
(i assumed youre using windows)
Regards.

Posted 14-Aug-11 7:26am

mbue

Comments

Sergey Alexandrovich Kryukov 15-Aug-11 0:01am

Agree, my 5.
--SA

Harmanjeet Singh · Accepted Answer · 2011-08-14T14:03:00

You can not do this using Windows or any other OS like Linux or MAC. The reason is that, As Windows runs in Protected Mode along with various security features, when some file is loaded by some program in to the RAM in some particular memory block, that memory block is restricted to access by that program itself. Hence, No other programs can access that memory location.

Hope! the above words have answered you question... :)