增量式备份

backUpIncremental.sh

@@ -14,6 +14,12 @@ LAST_BACKUP=$(cat "$backUpPath/last_backup.txt")
 LAST_BINLOG=$(echo "$LAST_BACKUP" | awk '{print $1}')
 LAST_POSITION=$(echo "$LAST_BACKUP" | awk '{print $2}')
 
+# 如果是第一次运行，设置初始值
+if [[ -z "$LAST_BACKUP" ]]; then
+    LAST_BINLOG="none"
+    LAST_POSITION="0"
+fi
+
 # 获取当前binlog文件名和位置
 CURRENT_BINLOG=$(mysql -u$userName -p$password -h$host -e "SHOW MASTER STATUS" | awk '{print $1}')
 CURRENT_POSITION=$(mysql -u$userName -p$password -h$host -e "SHOW MASTER STATUS" | awk '{print $2}')