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Retrospect is CPU bound


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I just upgraded to v12 for the speed improvements.

 

I started a grooming (matching) and I see the process is at 100% (1 hardware thread), when I have 8 in my MBP and nothing else is running.

 

This bottleneck has existed for as long as I can remember (I use Retrospect since the Cube).

 

It is time to make such tasks multicore, at least 4 hardware threads for Desktop.

 

BTW, I bought Desktop originally instead of Express because it supported tape, and I think it does not now (considering going back to LTO), and I only need to backup 1 or 2 computers.

 

Thanks

 

 

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The Desktop version supports a single tape drive. The Single-Server version support a tape library with a single tape drive.

 

For most tasks, the bottleneck is i/o, not CPU.

 

I think that Retrospect uses one CPU core per execution unit. Since Desktop is limited to one execution unit, it uses one core.

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I can see for many years now in the system monitor that it is limited to 1 hardware thread per activity.

 

I spend a lot of the time bottlenecked by this, so it is worth optimising (at least in matching, where I was seeing it now). I basically have no use for multiple concurrent activities.

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