Bulk file restore from Google Cloud Storage -


accidentally run delete command on wrong bucket, object versioning turned on, don't understand steps should take in order restore files, or what's more important, how in bulk i've deleted few hundreds of them.

will appreciate help.

to restore hundreds of objects simple as:

gsutil cp -ar gs://my-bucket gs://my-bucket

this copy objects (including deleted ones) live generation, using metadata-only copying, i.e., not require copying actual bytes. caveats:

  1. it leave deleted generations in place, costing storage.

  2. if bucket isn't empty command re-copy live objects on top of (ending archived version of each of well, costing storage).

  3. if want restore large number of objects simplistic script run - you'd want parallelize individual gsutil cp operations. can't use gsutil -m option in case, because gsutil prevents that, in order preserve generation ordering (e.g., if there several generations of objects same name, parallel copying them end live generation coming unpredictable generation). if have 1 generation of each parallelize copying doing like:

    gsutil ls -a gs://my-bucket/** | sed 's/\(.\)\(#[0-9]\)/gsutil cp \1\2 \1 \&/' > gsutil_script.sh

this generates listing of objects (including deleted ones), , transforms sequence of gsutil cp commands copy objects (by generation-specific name) live generation in parallel. if list long you'll want break in parts don't (for example) try fork 100k processes parallel copying (which overload machine).


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