[lustre-discuss] Delaying Lustre striping until first extent

[John Bauer]

Has any there been any discussion as to allowing a user to modify the 
striping of a file until the first extent is made?  There are a lot of 
opens that can not be easily replaced with *llapi_file_open*(), such as 
*openat*() family, *mkstemp*() family, and *fopen*() family.

It seems that it should be feasible to change the file's striping even 
after the file is created but not written to.

It would be really handy to have a function *llapi_fd_set_stripe*( int 
fd, ... ) to set the striping for a file that has been opened but not 
written to.  I have gotten past my immediate need for setting the 
striping of a file opened with *fopen64*() by doing the 
*llapi_file_open*() and then using the resulting fd in *fdopen*().  But 
this approach is not applicable to all listed above.


Thanks, John

-- 
I/O Doctors, LLC
507-766-0378
bauerj at iodoctors.com

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