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May 12, 2022 16:02
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A bash script using the B2 CLI to restore Backblaze cloud storage deleted files for a given prefix in a bucket with parallel processing for speed.
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| #!/bin/sh | |
| if [ -z "$1" ] | |
| then | |
| echo "No bucketname supplied." | |
| exit 1 | |
| fi | |
| if [ -z "$2" ] | |
| then | |
| echo "No prefix supplied (example 360/jkloxsuc/)." | |
| exit 1 | |
| fi | |
| recover_file(){ | |
| FILE_ID=$(awk '{ print $1 }' <<<$1) | |
| FILE_KEY=$(awk '{ print $6 }' <<<$1) | |
| b2 delete-file-version "$FILE_KEY" "$FILE_ID" | |
| } | |
| LIST=$(b2 ls --recursive --long --versions "$1" "$2" | grep " hide ") | |
| if [ ! -z "$LIST" ]; then | |
| N=10 #number of parallel deletes | |
| while IFS= read -r line; do | |
| ((i=i%N)); ((i++==0)) && wait | |
| recover_file "$line" & | |
| done <<< "$LIST" | |
| echo "Restore complete!" | |
| else | |
| echo "No files to restore." | |
| fi |
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When you have versioning turned on in a Backblaze B2 cloud storage bucket (always on for 1 day minimum) you can restore deleted objects by finding and deleting the "delete/hide markers" to restore the old version. This script makes that easy and fast.
Usage:
b2 authorize-accountbash b2-restore.sh <bucket> <prefix>