Re: Backing up large unchanging files

[Tim Bishop <tim@bishnet.net>]

On Thu, Jul 17, 2025 at 11:43:41PM +0000, Colin Percival wrote:
> On 7/17/25 13:37, Tim Bishop wrote:
> > On Thu, Jul 17, 2025 at 07:20:45PM +0000, Colin Percival wrote:
> > > I *think* I can address this with a patch to say "cache trailers on large
> > > files even if we've decided on our own to switch into lowmem mode".  You've
> > > been using Tarsnap for a long time; can I assume that you can test a patch
> > > for me once I've written something?
> > 
> > Absolutely!
> 
> Can you try this patch?
> 
> https://github.com/Tarsnap/tarsnap/commit/61dab1292c19510f98d7dc7266b0e9320457ee97

Initial impression is that it hasn't worked, but I need to wait for the
daily jobs to finish so I can do some more controlled tests.

Looking at that patch though it's checking mtime? Is that the mod time
of the file rather than the size?

Tim.