Applicable Products
- QuTS hero h6.0.0 or later
- Snapshot Manager
Overview
Starting from version h6.0.0, QuTS hero supports SnapSync jobs in a high-availability (HA) environment. Specifically, you can create SnapSync jobs where the source NAS is in an HA cluster.
Limitations
- Only scheduled and manual SnapSync jobs are supported. Real-time SnapSync jobs are not supported.
- Only the source NAS can be in an HA cluster. The destination NAS cannot be in an HA cluster.
- You must select a cluster interface as the source network interface for the SnapSync job.
If you select a non-cluster interface, the SnapSync job may fail to reconnect after an HA failover or switchover.
Tip
A cluster interface is a network interface configured with a cluster IP address, which allows external devices to connect to the cluster through the same address no matter which device is the active node at any given time.
For details, see
What is a cluster IP address and how do I use it?
What Happens After Switching a Node to Standalone Mode
When you press and hold the physical reset button on the active node, you reset the NAS and at the same time remove it from the HA cluster, turning it into a standalone device. The passive node remains in the HA cluster and automatically takes over as the new active node.
In this scenario, the SnapSync jobs are retained on both NAS devices, and the same job on both devices points to the same destination.
When you edit the SnapSync job on both devices, the destination NAS keeps only the most recent change, no matter which device it came from. This may lead to data inconsistency and synchronization conflicts.
We highly recommend users remove the SnapSync job from one of the NAS devices to avoid potential issues.
Further Reading
适用产品
- QuTS hero h6.0.0 or later
- Snapshot Manager
概述
从版本 h6.0.0 开始，QuTS hero 支持在高可用性 (HA) 环境中运行 SnapSync 作业。具体来说，您可以创建源 NAS 位于 HA 群集中的 SnapSync 作业。
限制
- 仅支持计划和手动 SnapSync 作业。不支持实时 SnapSync 作业。
- 只有源 NAS 可以位于 HA 群集中。目标 NAS 不能位于 HA 群集中。
- 您必须选择一个群集接口作为 SnapSync 作业的源网络接口。
如果选择非群集接口，SnapSync 作业可能在 HA 故障转移或切换后无法重新连接。
切换节点到独立模式后会发生什么
当您按住活动节点上的物理重置按钮时，您将重置 NAS，并同时将其从 HA 群集中移除，使其成为独立设备。被动节点仍然在 HA 群集中，并自动接管成为新的活动节点。
在这种情况下，SnapSync 作业保留在两个 NAS 设备上，并且两个设备上的相同作业指向相同的目标。
当您在两个设备上编辑 SnapSync 作业时，目标 NAS 只保留较近的更改，无论更改来自哪个设备。这可能导致数据不一致和同步冲突。
我们强烈建议用户从其中一个 NAS 设备中移除 SnapSync 作业以避免潜在问题。
进一步阅读
