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Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the
From: |
Tim Kientzle |
Subject: |
Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive |
Date: |
Mon, 29 Aug 2016 12:19:30 -0700 |
> On Aug 29, 2016, at 6:13 AM, Steffen Nurpmeso <address@hidden> wrote:
>
> I've changed it back to how it was all the time, and only use "|
> xargs -0 tar -r -f $ar", adding the compression step later on.
The -r option is pretty expensive; it has to read the entire existing archive
from the beginning to identify the end of the last entry, then it can write new
entries from that point (overwriting any final padding).
If you want to select the files with a separate mechanism, then you really
should use -I or -T or list= or other equivalent option (depending on the
particular tar implementation you're using).
(Also, be careful to not include directories in your generated file list -- tar
by default will walk those directories and include all the contents, which can
result in many duplicate copies.)
Cheers,
Tim
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, (continued)
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, Joerg Schilling, 2016/08/29
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, Ralph Corderoy, 2016/08/29
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, Steffen Nurpmeso, 2016/08/29
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, Joerg Schilling, 2016/08/29
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, Steffen Nurpmeso, 2016/08/29
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, Joerg Schilling, 2016/08/30
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, Steffen Nurpmeso, 2016/08/30
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, Joerg Schilling, 2016/08/30
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, Steffen Nurpmeso, 2016/08/31
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive,
Tim Kientzle <=
- Re: [Bug-tar] Monthly backup doesn't expand files, but which are in the archive, Steffen Nurpmeso, 2016/08/29