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how does "delete slowly" function behind the scene

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neutron68

Post subject: how does "delete slowly" function behind the scene

Posted: Mon Aug 06, 2007 8:36 am

Joined: Tue Mar 28, 2006 8:26 pm

Posts: 804

Location: Minneapolis, MN

I've got "delete files slowly" enabled in my KM box.

How is the slow delete being accomplished? Is it a command line switch that is part of the "rm" command or is this something that Mythtv is doing/managing on it's own? What are the inner workings of the slow delete process?

I wonder if a slow delete can be done from a command line. Such as:

Code:

# rm /myth/video/file.mpg" -slow

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KnoppMyth R5.5, Asus A8N-VM CSM (nvidia 6150 onboard video), AMD Athlon 64 dual-core 4200+, two 1GB sticks DDR 400, HD-3000 HDTV card, PVR-150 card, Iguanaworks RS-232 IR receiver/transmitter, Pioneer DVR-110 DVD burner

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nigelpearson

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Posted: Mon Aug 06, 2007 5:14 pm

Joined: Wed Mar 03, 2004 7:43 pm

Posts: 748

Location: Sydney, Australia

MythTV has code to do it. There is no magical 'rm' option.

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| Nigel Pearson, nigel.pearson.au@gmail.com
| "Things you own end up owning you" - Tyler, Fight Club

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tzoom84

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Posted: Mon Aug 13, 2007 12:56 pm

Joined: Sat May 26, 2007 9:51 pm

Posts: 130

Doing a quick search on google I found this snippet (not sure about the validity):

Quote:

...Delete the files in Myth, which uses a "delete slowly" function
> to avoid locking up the machine for the 30-60 seconds that this would
> otherwise require. Myth appears to open the file, unlink it, and then
> sit in a loop doing small ftruncate's until nothing is left.

Source: Link

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