vector write/read

[Tigran Mkrtchyan]

Hi,


just want to ask why vector operations are not a part to nio?

we are working on distributed storage and our users  often know where 
data is (files are like small databases - header and records). We have 
our own protocol for it and extensions to posix IO api:

typedef struct {
	off64_t offset;
	int len;
	char *buf;
} iovec2;

extern int     dc_readv2(int, iovec2 *, int);

Basically what it does is you give an array of buffers and for each 
buffer you provide an offset. It's very helpful when there is a lot of 
randomly distributed small records. If file system do not support it you 
can always fall back to 'classic' reads internally, but provide only 
classic API force other people to find some custom solutions.



Regards,
	Tigran.

________________________________________________________________________
Tigran Mkrtchyan                               DESY, IT,
tigran.mkrtchyan at desy.de                       Notkestrasse 85,
Tel: + 49 40 89983946                          Hamburg 22607,
Fax: + 49 40 89984429                          Germany.