Local and distributed mirroring in a VPLEX environment are managed at the device virtualization layer of the director IO stack. Here’s the explanation:
Device Virtualization Layer: This layer is responsible for the creation and management of virtualized storage devices in VPLEX. It abstracts the physical storage and presents it as virtual volumes that can be accessed by hosts.
Mirroring Management: Both local and distributed mirroring are configured at the device level.Local mirroring involves creating RAID-1 devices within the same VPLEX cluster, while distributed mirroring involves creating distributed devices across two VPLEX clusters12.
Coherent Cache: The coherent cache layer is involved in maintaining cache coherency across the VPLEX clusters but does not manage the mirroring of devices.
Storage View: The storage view layer is where hosts are mapped to virtual volumes. It does not manage the mirroring of devices but rather the access to them.
Storage Volume: The storage volume layer represents the physical storage volumes from backend arrays before they are virtualized by VPLEX. It is not the layer where mirroring is managed.
By managing mirroring at the device virtualization layer, VPLEX ensures that data is protected and available across multiple storage systems, providing high availability and disaster recovery capabilities.
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