Fwd: how many netcdf files can be opened at one time?

Begin forwarded message:

> From: Rick Brownrigg <brownrig@ucar.edu>
> Date: October 19, 2009 10:33:59 AM MDT
> To: Xuguang Sun <sunxg007@yahoo.com.cn>
> Subject: Re: how many netcdf files can be opened at one
> time?
>
> Hi,
>
> Many operating systems have a limit on the number of open files a
> process is allowed to have. On a Linux/Unix system, this can be
> determined with the bash command "ulimit -n". Limits of 1024 files
> per process are common. Is this perhaps the issue?
>
> Rick
>
> On Oct 19, 2009, at 10:08 AM, Xuguang Sun wrote:
>
>> Dear everyone,
>>
>> I have a list of files named by the date, for example, 1900-01.nc,
>> 1900-02.nc, ... 1999-11.nc, 1999-12.nc, 1200 files in all. I'd like
>> to open them by using the addfiles() function, the script is the
>> followings,
>>
>> fns = systemfunc("ls 19??-??.nc")
>> in = addfiles(fns,"r") ; open netcdf file
>> ListSetType(in,"cat") ;specify type of merge
>>
>> There is an error message,
>>
>> fatal:Too many open files
>>
>> it seems that there is a limit for opening NetCDF files in NCL. Is
>> that so?
>>
>> Thanks.
>>
>> Xuguang SUN
>>
>>
>>
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Received on Mon Oct 19 10:36:04 2009