Lustre 1.6 Operations Manual

Examples
System default size is 4MB.
char *tfile = TESTFILE;
int stripe_size = 65536
To start at default, run:
int stripe_offset = -1
To start at the default, run:
int stripe_count = 1
To set a single stripe for this example, run:
int stripe_pattern = 0
Currently, only RAID 0 is supported.
int stripe_pattern = 0;
int rc, fd;
rc = llapi_file_create(tfile,
stripe_size,stripe_offset, stripe_count,stripe_pattern);
Result code is inverted, you may return with ’EINVAL’ or an ioctl error.
if (rc) {
fprintf(stderr,"llapi_file_create failed: %d (%s) 0, rc,
strerror(-rc));
return -1;
}
llapi_file_create closes the file descriptor. You must re-open the descriptor. To
do this, run:
fd = open(tfile, O_CREAT | O_RDWR | O_LOV_DELAY_CREATE, 0644);
if (fd < 0) \ {
fprintf(stderr, "Can’t open %s file: %s0, tfile,
strerror(errno));
return -1;
}
Chapter 30 Setting Lustre Properties (man3) 30-3