[OpenAFS] mmap issue?

[Eric Chris Garrison]

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Hello,

I've had a complaint from one of our users.  He says:

"I just had afs do a very very nasty thing to me.   I ran a program on
a data file and for some unknown reason the file was totally corrupted
after running this program.   I can absolutely certify that the problem
is not the program itself because I ran exactly the same program on a
local disk and it did what I was asking it to do without corrupting the
file.

I suspect strongly this problem is created by memory mapping of the file
which I think this program is implicitly using.   The actual thing I was
running was a perl script, but it was calling programs I am pretty sure
do memory mapping for io speed."

I asked him for details, and he is using code that uses this:

"I was running a program in the "Antelope" package sold by brtt.com.
The particular program is a perl script called dbfix_calib. However, the
offender is almost certainly this line
system( "dbjoin $dbname.$table calibration | dbset -v - $table.calib
'calib == NULL' calibration.calib" );"

He is running OpenAFS 1.5.77 for MacOS 10.6.8, and our servers are at
1.4.14-1.1.1.

I've searched for this, and it appears mmap operations used to be a
problem.  At what version of OpenAFS (server and client) should we be at
for this to not be a problem?

Thank you,

Chris
-- 
Eric Chris Garrison | Principal Mass Storage Specialist
ecgarris@iu.edu     | Indiana University - Research Storage
317-278-1207        | Jabber IM: ecgarris@iupui.edu

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