San Virtualization Layer; Physical Layout Example-3-Node Cluster - Dell EMC VxFlex Ready Node User Manual
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SAN virtualization layer
Figure 12 Physical layout example—3-node cluster
Meta Data Manager (MDM)
Storage Data Server (SDS)
Storage Data Client (SDC)
Communication is done over the existing LAN using standard TCP/IP. The MDM and
SDS nodes can be assigned up to eight IP addresses, enabling wider bandwidth and
better I/O performance and redundancy.
You can perform physical layer setup using the following methods:
VxFlex OS Installer, a web-client based tool
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VxFlex OS VMware plug-in a VMware plug-in
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Manual installation procedures
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After completing this installation, the physical layer is ready, and can expose a
virtual storage layer.
This section details the steps for exposing the virtual SAN devices to servers with
installed and confiured SDCs.
The MDM cluster manages the entire system. It aggregates the entire storage
exposed to it by all the SDSs to generate a virtual layer - virtual SAN storage. Volumes
can now be defined over the Storage Pools and can be exposed to the applications as
a local storage device using the SDCs.
To expose the virtual SAN devices to your servers (the ones on which you installed
and configured SDCs), perform the following:
1. Define volumes. Each volume defined over a Storage Pool is evenly distributed
over all members using a RAID protection scheme. By having all SDS members of
the Storage Pool participate, VxFlex OS ensures:
Highest and most stable and consistent performance possible
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Rapid recovery and redistribution of data
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Massive IOPS and throughput
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You can define volumes as follows:
Dell EMC VxFlex Ready Node AMS User Guide
Architecture
69
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