- Notes, cautions, and warnings
- Introduction
- Revision history
- PowerFlex overview
- System requirements and product limits
- Architecture
- System
- MDM cluster
- Virtual IP addresses
- Storage definitions
- Storage pools
- Acceleration pools
- Data layout
- Volumes
- Naming PowerFlex objects
- NVMe over TCP overview
- PowerFlex file services
- Replication
- Replication peer systems
- Storage data replicator
- Journal
- Replication consistency group
- Replication pairs
- Recovery point objective
- Replication I/O flow
- Replication auto-provision
- Replication initial copy
- Activating or terminating a replication consistency group
- Pause replication
- Using replicated volumes
- Accessing target volumes
- Setting up replication
- Dell APEX Block Storage
- Protection and load balancing
- Cache
- Networking
- SDC connection monitoring
- SMART hardware monitoring
- Snapshots
- Performance
- Migrating volumes
- Implementing PowerFlex
- Additional functions
- Maintenance
- PowerFlex management
- Configure direct attached storage
Dell PowerFlex 4.5.x Technical Overview
System stability
The MDM proxy ability augments the network stability capabilities.
In the PowerFlex architecture, each SDC is required to be fully connected to the MDM for control and management of actions. If the SDC is unable to reach the MDM, the SDC will move to the disconnected state, which at some point could lead to complete I/O failure.
PowerFlex allows clusters that don't use the MDM virtual IP capability to use the secondary MDMs as a proxy for all control traffic, allowing more redundancy in case of network failures.
When such an occurrence occurs and the MDM proxy is in use, the management APIs raise an appropriate alert.
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