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Re: snapshots (archive files) are too big ... Why?
- From: Houder <houder at xs4all dot nl>
- To: cygwin at cygwin dot com
- Date: Sat, 23 Jan 2016 20:55:49 +0100
- Subject: Re: snapshots (archive files) are too big ... Why?
- Authentication-results: sourceware.org; auth=none
- References: <ed7dd3377a4cc1aa59001d627c7237ad at xs4all dot nl> <20160123181053 dot GF3268 at calimero dot vinschen dot de> <b3c07e0f903d91ae52fb6fb202eef1e5 at xs4all dot nl> <20160123192515 dot GG3268 at calimero dot vinschen dot de>
On 2016-01-23 20:25, Corinna Vinschen wrote:
On Jan 23 20:09, Houder wrote:
On 2016-01-23 19:10, Corinna Vinschen wrote:
>I found out why this happens, I just don't know why it only occurs since
>The reason is the script is using an expression along the lines of
> find ... | tar -T - --no-recursion -cjf ...
>It turns out that the --no-recursion option only works for me, if it
>comes *prior* to the expression specifying the filenames to archive.
>That is, I had to change the script to use
> find ... | tar --no-recursion -T - -cjf ...
>instead. Funny enough, `info tar' still contains an example using
>the original order...
Ah, thank you for the effort you took and for your explanation. (yes,
the reason for the "big" files was simpler than I was guessing at).
However, I cannot confirm your finding at my end (using Cygwin).
I am sure you will take another look at the size of a snapshot when
create one the next time :-)
Of course I created local test snapshots using the above change. They
only have one version of each file and are considerably smaller than
previous versions. I'm building on Fedora Linux if that matters.
@@ mkdir x
@@ cd x
@@ tar xJf ../cygwin-inst-20160121.tar.xz
@@ find etc usr | wc -l
# preferred order (options)? tar manual: 6.9 Descending into
@@ find etc usr | tar --no-recursion -T- -cJf ../foo.tar.xz
# NOT the preferred order (options)?
@@ find etc usr | tar -T- --no-recursion -cJf ../foo2.tar.xz
@@ tar tvJf ../foo.tar.xz > foo1
@@ tar tvJf ../foo2.tar.xz > foo2
@@ diff foo1 foo2
@@ wc -l foo*
Did the same test on FC19. Same result.
But, let it rest for the moment, I would advice. Next time when you will
build a snapshot, you (we) will know.
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