Peter, I have an application that copies alot of 3 to 8 MB files.
Since it inevitably takes a long time, I tried buffer sizes from 1k
up to the whole file. The fastest, though not by a huge amount, was
around 32k. There didn't seem to be any noticable disc thrashing.
This was from disc to disc,though, not partition to partition.
I'd imagine it also depends on the particular computer and discs.
best,
Mark Smith
On 7 Feb 2007, at 00:05, Peter Reid wrote:
Hello Mark,
Thanks for the rapid and detailed response. I'll have a play
around with the things you suggest. However, I did try much
smaller chunks initially (250Kb) but found the external drive which
is used to hold both partitions (source & destination) went
somewhat berserk and the copying was considerably slower! Given
that the typical size of each backup file being copied is about
1.5Gb, 250Kb chunks would take too many cycles. This is why I
increased the chunk size up to 10Mb.
I'll take a look at your AppleScript and shell suggestions for
setting the dates.
Thanks again.
Regards,
Peter
On 6 Feb 2007, at 11:53 pm, Mark Schonewille wrote:
Hello Peter,
I think that 10MB is quit a big chunk of data. Have you tried
smaller chunks as well? My experience is that smaller chunks give
a smoother impression, while they don't slow down copying much.
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