Solaris : writing into file stops abruptly 1

[nphani]

Hello all,

I use a SUN Solaris machine. I am using a simulator which traces all the instructions run by a simulator and generates a file of all those instructions. I run about 400 million instructions to generate the trace. But the trace stops abruptly at around 12 million instructions. Even if I change the number 400 to 50, the problem is the same whereas, if I run about 5000 instructions (not 5000 million, just 5000), the trace obtained is perfect. I checked the ulimit -a and get:
time(seconds) unlimited
file(blocks) unlimited
data(kbytes) unlimited
stack(kbytes) 8192
coredump(blocks) 0
nofiles(descriptors) 256
vmemory(kbytes) unlimited
(The file size can be infinite).
Can anybody give me some tips of how to solve this problem?

 

[bi]

How large is the file you do get? What version of Sun?

 

[nphani]

It is Solaris 8 as "uname -a" returns:

SunOS 5.8 Generic_108528-16 sun4u sparc SUNW,Sun-Blade-100

and all the files that are generated are of 2 GB size, though "ulimit" says "unlimited".

 

[bi]

Yes, but if the filesystem you are writing to isn't large file enabled (or large file aware, I think, on Sun), you will not be able to write a file larger than 2 GB, even if your ulimit is unlimited.

 

[bi]

Or maybe the application that is writing the trace file isn't large file aware?

 

[nphani]

how do i check the file system and the maximum file size possible in it? how do i change those settings, if possible?

 

[bi]

There is a command, which I have seen recently on Tek-Tips, that will tell you, I think. I've been searching for it since my last posting. I can't find it in the Solaris forum.

 

[bi]

Found it. Check this thread: thread80-560946

mount -v

You should see largefiles on the line for the filesystem you are writing to.

 

[nphani]

Thanx a lot Bi,
I think the system admin has not given me permissions to run the mount command. Though man mount shows the manual page, mount says command not found. I will let my system admin know about this.
thanx again,
Phani

 

[bi]

It might not be in your path. Type /etc/mount. I'm able to do it as a regular user on Solaris 7 and Solaris 9 (we don't have an 8 box).