Backup & Recovery

Protecting cache data.

Backup

Local Cache

tar -czf rninja-backup.tar.gz -C ~/.cache rninja

Server Cache

# Stop server for consistent backup
systemctl stop rninja-cached
tar -czf cache-backup.tar.gz -C /var/lib rninja-cache
systemctl start rninja-cached

Automated Backup

#!/bin/bash
# /etc/cron.daily/rninja-backup

BACKUP_DIR=/backups/rninja
DATE=$(date +%Y%m%d)

tar -czf $BACKUP_DIR/cache-$DATE.tar.gz -C /var/lib rninja-cache

# Keep 7 days
find $BACKUP_DIR -name "cache-*.tar.gz" -mtime +7 -delete

Recovery

Restore Local Cache

rm -rf ~/.cache/rninja
tar -xzf rninja-backup.tar.gz -C ~/.cache

Restore Server Cache

systemctl stop rninja-cached
rm -rf /var/lib/rninja-cache
tar -xzf cache-backup.tar.gz -C /var/lib
systemctl start rninja-cached

Disaster Recovery

If cache is lost:

1. Start with empty cache
2. First builds populate cache
3. Subsequent builds get hits

Cache is a performance optimization, not critical data.