Re: [Pfspd-users@sf.net] File fragmentation

[Harold S. <har...@ph...>]

Hello,

Thanks to Bram's rigorous testing, we uncovered a problem with the win32 
file I/O.

In overlapped (asynchronous) mode, reserving the file space does not 
complete immediately,
but it appears that some data (zeros ?) is written to disk. On a local 
file system, this takes some time, but works ok.
However,on a network share (e.g. writing remotely to a streamer pc), there 
is a timeout after 2-3 GB, and the application crashes.

Workaround is to create a file using regular I/O, reserve disk space, 
close it, then open again in overlapped mode.
The disk space allocation is moved to p_fio_allocate( ).

Please note that this only affects you if you are using the development 
version of cpfspd (sf.net), so update your cvs sandbox.

Regards,
Harold
___________________________________
Ing. H.A.W. Schmeitz
Video Processing Systems, Philips Research Laboratories

High Tech Campus 36, 5656 AE Eindhoven, The Netherlands
Tel. +31 (0)40 27 46489
har...@ph...