[Magic-dev] Maximum filesize limit exceeded

[R. Timothy Edwards]

Dear Anand,

> I am still running Magic 7.1.5 for our production designs. On one of our
> recent designs, when trying to write to gdsII, magic exited with a
> "Maximum filesize limit exceeded" error, it is obvious that the file
> being created is > 2GB.
> 
> What are my options ? Upgrade to 7.4.8 and compile and use in a 64 bit system ?

No.  The limits are a function of your kernel version and your filesystem.
Go read:

    http://cbbrowne.com/info/fs.html

The part at the end not only explains filesystems and the 2GB limit, but
is also entertaining to read.

64 bits will only help you if your *internal* database exceeds 2GB.
Note, however, that magic's internal database consists of lots of
pointers, which means that migrating to 64 bits automatically doubles
the size of the database for any given design---so you need more than
4GB of memory to take advantage of the 64-bit architecture!

Naturally, I've thought of a way around this problem which will beat
the socks off of Cadence, performance-wise, if I ever get some time
to code it.

					Regards,
					Tim

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| Dr. R. Timothy Edwards (Tim)   | email: tim.edwards at multigig.com     |
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