RE: memsize ferret error

Hi Jon,

I have attached a number of files containing (I hope) what you want and added the dataset xml and des file. There are 10 netCDF files, one for each year of the dataset. I have provided an ncdump for the 1994 file. I am using LAS 6.3. I have copied LASinfo.pl into server. I had previously modified std_initialize.jnl by adding a line “set mem/size=200” at the end. Unfortunately although this worked at the start it seemed that this request failed after the server had been running for a while. Indeed this was causing the system to fail when it really did not need that much memory. I have now set the memory to 128 using in las.xml

(<memsize>128<</memsize> in the <properties><ferret> group).

The example that has failed has asked for just over 100 Mwords. The machine itself only has 512Mbytes and if a Ferret word is 4 bytes we are very close to the entire machine memory.

I am not sure what is reasonable to expect from the LAS server. Some guidance would be appreciated.

The LAS server is at http://www.marine.csiro.au/las/servlets/dataset

Regards

Peter Turner

-----Original Message-----
From: Jonathan Callahan [mailto:Jonathan.S.Callahan@noaa.gov]
Sent: Wednesday, 7 July 2004 2:44 AM
To: Turner, Peter (Marine, Hobart)
Cc: pbmoses@ucsd.edu; oar.pmel.las_users@noaa.gov
Subject: Re: memsize ferret error

Peter,

It would be helpful to know the following:

· version of LAS

· precise LAS request (xml request object)

· ncdump -h of the data file

With these we should be able to come up with similar tests at our end to try and mimic the problem.

Of course, having access to your LAS is very useful so that we can see the problems. And putting the las/etc/LASinfo.pl (<6.3) or las/bin/LASinfo.pl (>=6.3) cgi script in las/server/ will allow us to do some debugging remotely.

-- Jon

Peter.J.Turner@csiro.au wrote:

Hi Phil,

        I have had the same problem with the LAS server I have setup. I

adjusted the ferret memory size and that helped but did not solve the

problem. I am having some difficulty understanding why Ferret seems to

need large amounts of memory. Perhaps some others who have more

experience with  LAS and Ferret could provide some guidance about how to

determine Ferret memory requirements?

Cheers

Peter Turner

-----Original Message-----

From: owner-las_users@pmel.noaa.gov

[mailto:owner-las_users@pmel.noaa.gov] On Behalf Of Phil Moses

Sent: Saturday, 3 July 2004 3:48 AM

To: las_users

Subject: memsize ferret error

Hello,

With some help from others, we have identified some errors that we have

been getting on our LAS server.

It was suggested that we modify the memsize within the ferret scripts

and see if this helps.

We are upgrading the physical memory of the machine, as we have

identified a need to do this anyway. However, I am curious if anyone can

pin-point the following error.

 **ERROR: insufficient memory: 27324000 words were requested.

Will adjusting the memsize in the ferret scripts help resolve this?

I have a few ideas but would like any suggestions from the experts prior

to making the adjustments.

[Tue Jun  1 03:12:53 2004] yes? set

region/x="20.0":"120.0"/y="-20.0":"5.0"/z="5":"5450"/t="16-Jan-1992":"16

-Dec-2002"

[Tue Jun  1 03:12:53 2004] yes? GO "jnls/std_list.jnl" "1" "salt"

"output/4cbe2e1e004de40a4b1ba1a1d69a2c5b.nc" "cdf"

[Tue Jun  1 03:12:53 2004]  **ERROR: insufficient memory: 27324000 words

were requested.

[Tue Jun  1 03:12:53 2004] define symbol data_isize

`salt[d=1],return=isize`

[Tue Jun  1 03:12:53 2004] Command file, command group, or REPEAT

execution aborted

[Tue Jun  1 03:13:45 2004] Adding an acceptable error string: "*** NOTE:

".

Thanks,

Phil