git-annex/ bugs/ free space checking

Should check that there is enough free space before trying to copy a file around.

  • Need a way to tell how much free space is available on the disk containing a given repository.

  • And, need a way to tell the size of a file before copying it from a remote, to check local disk space.

    As of annex.version 2, this metadata can be available for any type of backend. Newly added files will always have file size metadata, while files that used a SHA backend and were added before the upgrade won't.

    So, need a migration process from eg SHA1 to SHA1+filesize. It will find files that lack size info, and rename their keys to add the size info. Users with old repos can run this on them, to get the missing info recorded.

done; no migtation process for old SHA1 keys from v1 repo though. --Joey

comment 1

Keep in mind that lots of small files may have significant overhead, so a warning that it's not possible to make sure there's enough space would make sense for certain corner cases. Actually finding out the exact overhead is beyond git-annex' scope and, given transparent compression etc, ability, but a warning, optionally with a "do you want to continue" prompt can't hurt.

-- RichiH

Comment by Richard — Tue Mar 15 10:11:27 2011
comment 2
Right. You probably don't want git-annex to fill up your entire drive anyway, so if it tries to reseve 10 mb or 1% or whatever (probably configurable) for overhead, that should be good enough.
Comment by joey — Tue Mar 15 23:04:50 2011
comment 3
Sometimes, I might want to fill up the disk as much as possible. Thus, a warning is preferable to erroring out too early, imo -- Richard
Comment by Richard — Wed Mar 16 11:40:56 2011
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