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Old 09-06-2008, 06:36 AM   #1
mechagojira
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Can I NOT have a root acc and still make a RAMDISK in linux?


I have a user account on a CentOS system.
For my student project, I need a ramdisk with about 300MB capacity.
Can I somehow create a ram-disk although I'm NOT root?
Thanks!
 
Old 09-06-2008, 06:50 AM   #2
unSpawn
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If /dev/shm is accessable you can use that to write to. Otherwise no you can't, only if your unprivileged user has been granted root rights (CAP_SYS_ADMIN in this case).
 
Old 09-06-2008, 09:10 AM   #3
Whyte
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Laughable, idiotic, and overly-complicated suggestion:

Maybe you could try User-Mode Linux? (or qemu, or some other kind of virtualization)
 
Old 09-06-2008, 12:57 PM   #4
mechagojira
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Quote:
Originally Posted by unSpawn View Post
If /dev/shm is accessable you can use that to write to. Otherwise no you can't, only if your unprivileged user has been granted root rights (CAP_SYS_ADMIN in this case).

Thank you very much for this answer.

I wrote a perl-program which does a lot of file-access, reading a line, parsing the line, several x-thausand times. total runtime was 5 hours.

I then copied everything to /dev/shm in the hope that this would speed things up. it didn't, runtime is exactly the same as from HD!

So I guess the parsing of the line takes much more time than I thought, or /dev/shm got swapped or whatever.

anyway, thanks.
 
Old 09-08-2008, 12:28 AM   #5
chrism01
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Sounds odd. Care to post your prog?
 
  


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