[rrd-users] Parameter problem - was: LAST always returning zero

[Wes]

Well, it is acting up again.  I seem to be occasionally getting an extra row
of nan's.  Given the previous column description:

    1. The desired inverted value
    2. A straight 'LAST' with no IF
    3. A CDEF with an IF that instead normalizing nan to 1 and inverting,
prints -1 for nan, or the actual value.  I then add a VDEF LAST for this
CDEF (GPRINT complains if I use the CDEF).
    4. Timestamp of 2.
    5. Timestamp of 3.

There's a clear pattern here.

I am randomly getting:

    --end = 1205180908
    queue2  0  0 -1 1205180900 1205180920

When it works correctly, I see:

    --end 1205181178
    queue2  1  0  1 1205181180 1205181180

Another failure:

    --end 1205181288
    queue2  0  0  -1 1205181280  1205181300


Success:

    --end 1205181438
    queue2  1  0  0 1205181440 1205181440


Failure:

    --end 1205181508
    queue2  0  0  -1  1205181500  1205181520


Success

    --end 1205181658
    queue2  1  0  0 1205181660  1205181660

I printed out rows for the failures with rrdtool fetch, and everything is
there.

If I change the --end forumla to /10*10-12, I see exactly the same results
as above.

Same thing if I change it to -22.

Ditto if I cange it to -32, so I don't think it is due to a slow rrd
update..  

Wes