修改文件夹的protection level之后，哪个job会来执行re-stripe的操作呢？

有下面的一些job可能参与其中的，他们的描述如下：

AutoBalance，AutoBalanceLin - Balances free space in the cluster. The goal of the AutoBalance job is to ensure that each node has the same amount of data on it, in order to balance data evenly across the cluster. AutoBalance, along with the Collect job, is run after any cluster group change, unless there are any storage nodes in a “down” state.
Collect - Reclaims disk space that could not be freed due to a node or drive being unavailable while they suffer from various failure conditions.
FlexProtect， FlexProtectLin - Rebuilds and re-protects the file system to recover from a failure scenario. FlexProtect is responsible for maintaining the appropriate protection level of data across the cluster.
MultiScan - Runs Collect and AutoBalance jobs concurrently. It ombines the functionality of AutoBalance and Collect, is automatically run after a group change which adds a
device to the cluster.
SetProtectPlus - Applies the default file policy. This job is disabled if SmartPools is activated on the cluster.

（SmartPools - Job that runs and moves data between the tiers of nodes within the same cluster. Also executes the CloudPools functionality if licensed and configured.）

从定义来看，MultiScan和AutoBalance，Collect这几个job是在新的节点或盘添加进cluster的时候，进行restripe的工作。FlexProtect是在有盘或节点挂掉的时候，进行restripe的工作。

难道是SetProtectPlus？

呵呵，这个问题的答案有点欠抽。事实上是，这个问题本身就是错的。

在当你改变一个文件夹的protection level的时候，这事儿根本就不是某一个job去完成的，这个修改protection level的命令会一直运行，直到结束。