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10.5: Improve networked Time Machine performance
Authored by: felix-fi on May 14, '08 10:56:19PM

I may be wrong, but it sounds like a VERY BAD IDEA...

For example, hdiutil compact only reclaims bands which are completely "free"... (see the man page).

" For SPARSEBUNDLE images, completely
unused band files are simply removed."

I can easily imagine a situation where you end up with 500 1g bands which have files and TM thinking that the backup is full...

But I may be wrong... you tell us in a week or two.



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10.5: Improve networked Time Machine performance
Authored by: res1233 on Nov 16, '13 06:49:51PM

Actually, this likely isn't the case. The bands likely work much like a sliced up sparse image, which can be compacted just like sparse bundles. The thing about removing bands is just a handy optimization due to the fact that removing files is far faster than deleting parts of files. If I had to guess (although I don't have any actual evidence...) the bands can probably be removed of free sectors just like the sparse images can.



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