only leave the freshest backup of each volume

cleanup-backups.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# Directory containing the backup files
+backup_dir="/backup"
+
+# Get a list of all backup files
+backup_files=$(find "$backup_dir" -type f -name 'rpc_*-*.tar.zst')
+
+# Iterate through each backup file
+for file in $backup_files; do
+    # Extract volume name from the file name
+    volume_name=$(basename "$file" | cut -d '-' -f 1-3)
+
+    # Get the latest backup file for this volume name
+    latest_backup=$(find "$backup_dir" -type f -name "$volume_name-*" -printf "%T@ %p\n" | sort -n | tail -1 | cut -d ' ' -f 2)
+
+    # Keep only the latest backup file for this volume name
+    if [[ "$file" != "$latest_backup" ]]; then
+        echo "$file"
+    fi
+done