[Radiance-general] rtcontrib - setting maximum number of open files on OSX 10.6.8

[Jack de Valpine]

Hi Michael,

Not sure if this will help or not as this is a linux thing, but perhaps 
there is something similar in OSX. Under linux there is "limits.conf" 
which enables configuration of limits in a number of different ways 
including by username.

-Jack

-- 
# Jack de Valpine
# president
#
# visarc incorporated
# http://www.visarc.com
#
# channeling technology for superior design and construction


On 7/20/2011 3:01 PM, Michael Martinez wrote:
> My second question is for Radiance users running OSX. I'm having 
> trouble setting the maximum number of open files to more than 1024. 
> I'm running OSX 10.6.8, and there seems to be two ways to change the 
> maximum number of open files - one using ulimit and one using launchctl.
>
> In *.bash_profile* I have this line:
>
> ulimit -S -n 4096
>
> In *etc/launchchd.conf *I have this:
>
> limit maxfiles 4096
> sysctl -w kern.maxfiles=4096
>
> and in *etc/sysctl.conf *I have:
>
> kern.maxfiles=4096 kern.maxfilesperproc=4096
>
> In a terminal line, when I enter launchctl limit  I see this:
>
>         cpu         unlimited      unlimited
>         filesize    unlimited      unlimited
>         data        unlimited      unlimited
>         stack       8388608        67104768
>         core        0              unlimited
>         rss         unlimited      unlimited
>         memlock     unlimited      unlimited
>         maxproc     266            532
> *maxfiles    4096           4096*
>
> Which is good. 4096 is more than the 2306 files I want rtcontrib to 
> talk to at the same time.
>
> But then, looking at ulimit -a in a terminal, I see this:
>
> core file size          (blocks, -c) 0
> data seg size           (kbytes, -d) unlimited
> file size               (blocks, -f) unlimited
> max locked memory       (kbytes, -l) unlimited
> max memory size         (kbytes, -m) unlimited
> *open files                      (-n) 1024*
> pipe size            (512 bytes, -p) 1
> stack size              (kbytes, -s) 8192
> cpu time               (seconds, -t) unlimited
> max user processes              (-u) 266
> virtual memory          (kbytes, -v) unlimited
>
> Which is bad - 1024 is less than the 2306 files I want rtcontrib to 
> talk to at the same time. Its also surprising given that it should be 
> set to 4096 by .bash_profile.
>
> Then when I try ulimit -n 4096, I get this:
>
> bash: ulimit: open files: cannot modify limit: Operation not permitted
>
> If I use sudo, it takes the command, but when I look at ulimit 
> -a again, the open files limit still says 1024, and despite what 
> launchctl limit says, 1024 is the governing number of maximum open files.
>
> Has anyone out there had success setting this in OSX 10.6 or higher? 
> Or has anyone updated to 10.7 (just released today) and had success?
>
> Many thanks,
> Michael
>
>
>
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