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do not copy files into archive #408

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anarcat opened this issue Nov 13, 2018 · 1 comment · May be fixed by #409
Open

do not copy files into archive #408

anarcat opened this issue Nov 13, 2018 · 1 comment · May be fixed by #409

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@anarcat
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anarcat commented Nov 13, 2018 •
edited

Is your feature request related to a problem? Please describe.

I find it difficult to use pywb on large datasets because the files are copied into the collections instead of just "referenced" there.

Describe the solution you'd like

When I add a file to a collection, it should be just treated as if it's in the collection somehow, without having to copy gigantic files around.

Describe alternatives you've considered

I have looked for options in the wb-manager program to see if something could fit the bill, particularly a way to symlink or hardlink files around. Haven't found anything. I also looked at the auto-indexer but i'm not sure how that works.

I also know about the wb-manager index command, but that only works for files already in the archive directory.

I also suspect custom user-defined collections might fit the bill, but I haven't figured out how to use those just yet, plus they probably require restarting the wayback process every time since a special configuration needs to be made for every archive...
anarcat added a commit to anarcat/pywb that referenced this issue Nov 13, 2018
@anarcat
support linking files in place instead of copying
22f20e6 
This allows users to manage collections of large WARC files without
duplicating space. Hardlinks are used instead of symlinks to reflect
the original mechanism, where the file is copied (so it can be safely
removed from the source). If we used symlinks, we would break that
expectation which could lead to data loss.

Inversely, hardlinks can lead to data loss as well. For example, pywb
could somehow edit the file, which would modify the original as
well. But we assume here pywb does not modify the file, and each side
of the hardlink can have their own permissions to ensure this (or not)
as well.

Closes: webrecorder#408
This was referenced Nov 13, 2018
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@traverseda
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On copy-on-wire filesystems like btrfs it would be nice if we could use btrfs's reflinks.

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WIP: allow symlinkinkg and hardlinking files instead of just copying anarcat/pywb
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@anarcat @traverseda