Fastest way to write huge files

[Mohamed Yousef]

Hello ,

let's say , I'm moving large files through network between devices
what is the fastest way to do this ?
what i came up with :-

1) using regular file operations with an in memory limit of 4MB which
when filled written to disk and re-filled again

2) using memory mapped files in the following way , map first 20MB of
file and after finishing them flush and map next 20MB
------
which of them should be faster in writting to disk ? and less memory consuming

or is there faster ways ?

Thanks,

Regards ,
Mohamed Yousef

 

[saswat]

Hello ,

let's say , I'm moving large files through network between devices
what is the fastest way to do this ?
what i came up with :-

1) using regular file operations with an in memory limit of 4MB which
when filled written to disk and re-filled again

2) using memory mapped files in the following way , map first 20MB of
file and after finishing them flush and map next 20MB
------
which of them should be faster in writting to disk ? and less memory consuming

or is there faster ways ?

Thanks,

Regards ,
Mohamed Yousef

In the send side :

You may want to use sendfile and here is python package for same
http://pypi.python.org/pypi/py-sendfile/1.2.3

In the receive side :

You may want to use splice (Linux 2.6.17 onwards) - Just read from a
network fd and write to a file fd

I just assumed you are using Linux.

Thanks
-Saswat