Administrator Guide
Table Of Contents
- Dell EMC Storage Systems Administrator Guide for PowerStore and Unity XT metro node feature
- CLI Workspace and User Accounts
- Meta Volumes
- System Management
- Thin support in metro node
- Provisioning Storage
- Volume expansion
- Data migration
- About data migrations
- Migrating thin-capable storage
- About rebuilds
- One-time data migrations
- Batch migrations
- Prerequisites
- Creating a batch migration plan
- Checking a batch migration plan
- Modifying a batch migration file
- Starting a batch migration
- Pausing/resuming a batch migration (optional)
- Canceling a batch migration (optional)
- Monitoring a batch migration’s progress
- Viewing a batch migration’s status
- Committing a batch migration
- Cleaning a batch migration
- Removing batch migration records
- Configure the WAN Network
- Consistency Groups
- Performance and Monitoring
- Metro node with active-passive storage arrays
- Index
Figure 7. Local consistency groups with local visibility
Global visibility
If the local consistency groups have their Visibility property set to both clusters (global visibility), both clusters can receive I/O
from the cluster that does not have a local copy.
All writes from that remote cluster pass over the inter-cluster WAN link before they are acknowledged.
Any reads that cannot be serviced locally are also transferred across the link. This allows the remote cluster to have instant on
demand access to the consistency group, but also adds additional latency for the remote cluster.
Local consistency groups with global visibility are supported in metro node Metro environments. Only local volumes can be
placed into the local consistency group with global visibility. Local consistency groups with global visibility always use write-
through cache mode (synchronous cache mode). I/O that goes to local consistency groups with global visibility will always be
synchronous.
the following shows a local consistency group with global visibility.
Consistency Groups
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