In article
wwvsiammhjn.fsf@l1AntVDjLrnP7Td3DQJ8ynzIq3lJMueXf 87AxnpFoA.invalid,
Richard Kettlewell wrote:
Jim Lesurf writes:
I've see all these suggested on webpages. Some look like synonyms with
different settings, but others don't.

So what's the recipy?

That depends what you want. Only you can decide that. 'man mount'
describes the meaning of the options. On one system I have:

tmpfs /tmp tmpfs defaults,size=8G,nr_inodes=256k,nosuid 0 0

Sorry, I'd assumed that from the context of the previous discussions it
would have been reasonably clear what I'd like. I said in an earlier
posting:

I've found that I can do something like

sudo mkdir -p /mnt/tmp

followed by

sudo -t tmpfs -o size=20m tmpfs /mnt/tmp

to create a temporary 20meg 'ram disc' mounted at /mnt/tmp

and that does what I want. But the second command needs repeating after
each bootup.

So my aim is to have this setup automatically via fstab, but I'd prefer a
name /mnt/ramdisc and a size of, say, 128m. I'd like that name because it
reminds me of what I can easily use for my RO programs where the data is
stored in ram.

cf below.

What I'd like is a ramdisc at /mnt/ramdisc which is of modest size and
I can use for temporary files.

NB tmpfs is _not_ a ramdisc; it is a filesystem that uses virtual
memory. The different from a traditional RAM disk is that there is no
underlying block device and its contents may be swapped out.

Yes, I'm aware it may get swapped onto other hardware at times. However
that's not likely to happen much with my systems as when I monitor that it
seems to almost never occur. And even if it does on rare occasion, that's
fair enough. I'm happy to regard any swapping as something I don't have to
notice for my simple programs.

I also realise there is a different Linux system with a name that could be
confused, and behaves differently. But I'm just doing this for my purposes
on my machines, aware of that.

Jim

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