Each running process chooses the "closest" shard of the source cluster and copies the data into the destination cluster, resharding the data if necessary.
-`config` — The path to the `zookeeper.xml` 带有连接到ZooKeeper的参数的文件。
-`task-path` — The path to the ZooKeeper node. This node is used for syncing `clickhouse-copier` 处理和存储任务。 任务存储在 `$task-path/description`.
-`base-dir` — The path to logs and auxiliary files. When it starts, `clickhouse-copier` 创建 `clickhouse-copier_YYYYMMHHSS_<PID>` 子目录 `$base-dir`. 如果省略此参数,则在以下目录中创建目录 `clickhouse-copier` 被推出。