In article <[EMAIL PROTECTED]>,
[EMAIL PROTECTED] (Alex van den Bogaerdt) writes:
>
> Karyn Ulriksen wrote:
>>
>> yup... its an nfs issue... works on local volumes just fine...
>>
>> will be changing thread here...
>
> glad you've found it. While I think this is not an RRDtool
> problem per se, maybe Tobi can fix it somewhere, somehow?
rrdtool uses fcntl to lock the rrd file. This needs a nfs implementation
with working locking. The original sun nfs has working locking. Linux
might have it with with version 2.2 or 2.4, don't know exactly. Look for
a running "lockd".
Maybe rrdtool could handle "ENOLCK" (no locks available) differently and
skip locking or use lock files.
> Anyway, what version of the software? RHx.y, NFS on both sides
> etcetera, etcetera.
I suppose Linux 2.0 or 2.2 without lockd ...
Rainer
PS: Use the following C program to test wether your nfs has working
locking:
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
main() {
FILE *rrd_file;
struct flock lock;
int stat, rrd_fd;
rrd_file = fopen("lockfile", "w+");
if (rrd_file == NULL) {
perror("open");
exit(1);
}
fprintf(rrd_file, "testinhalt\n");
fflush(rrd_file);
lock.l_type = F_WRLCK;
lock.l_len = 0;
lock.l_start = 0;
lock.l_whence = SEEK_SET;
rrd_fd = fileno(rrd_file);
stat = fcntl(rrd_fd, F_SETLK, &lock);
if (stat) {
perror("fcntl");
exit(1);
}
printf("konnte lockfile locken\n");
fclose(rrd_file);
unlink("loclfile");
}
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