incoming directory

John Rudd jrudd at UCSC.EDU
Mon Nov 25 21:47:42 GMT 2002

On Monday, Nov 25, 2002, at 13:06 US/Pacific, Nerijus Baliunas wrote:

> On Mon, 25 Nov 2002 19:10:33 +0000 Julian Field
> <mailscanner at ECS.SOTON.AC.UK> wrote:
>> By putting the directories into a ramdisk, you are forcing the OS to
>> use a
>> fixed amount of ram for this. In general, it is better to leave the
>> OS to
>> manage system resources itself, as it's usually better at it than the
>> "fixed" value you give by having it in a ram disk.
> Linux 2.4 has tmpfs filesystem, which does not have ramdisk problems.
> For
> example, User-mode Linux can place virtual memory files in tmpfs:
> Instead, we can use 'tmpfs' which is a dynamic RAM based file system.
> tmpfs only uses the memory it needs, so unlike ramfs, we don't have to
> set aside a whole chunk of RAM from the word go.


That's largely how it works in Solaris as well (the platform I'm
using).  Some people use tmpfs and ramdisk interchangeably.

In my case, I have 1GB of RAM on those machines.  I was thinking of
having the incoming work dir set mounted in tmpfs, and limit the size
of that tmpfs to 400ish mb.

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