🚀 go-pugleaf

In article <1992Dec20.011534.5366@cs.aukuni.ac.nz> jwil1@cs.aukuni.ac.nz (TMOTA) writes:

>   That is, I
>   get the impression that setting a large value for ADFSBuffers will NOT
>   have ANY effect on a SINGLE file, but using (e.g.) 256 buffers will allow
>   up to 256 files to be buffered simultaneously.
>   A value like 8 or 16 will probably be plenty - this will allow pretty much
>   all the files you ca expect to be open at any time to be buffered.

Actually adfsbuffers does have a dramatic effect on reading
and writing a single file. Using my RISC OS tar for a large hard disc
backup with compression, I normally set adfsbuffers to 255. Then
writing to the disc happens in the background and the compression
of a file can begin before the preceeding file has been completely
written to disc. This also works under taskwindows, so you get
somewhat better preemptive multitasking.

Alas there seems to be some kind of bug in the filing system as
it sometimes causes the machine to hang (and that gets really awful
if the disc maps are just being written). So if I'm doing a complete
backup of my hard disc I use the raw disc writing option in tar
which uses ADFS_DiscOp and avoids adfsbuffers.

-- Frank Lancaster, fl@tools.de