64 | Dell EMC VxRail Appliance Operations Guide
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capacity. If storage utilization were at 80%, there would not be enough available capacity to
maintain compliance with the Failure Tolerance Method (FTM) SPBM rules. In addition to the
20% reserve capacity for vSAN slack space, a best practice is to maintain at least one node’s
worth of capacity for high availability during planned and unplanned events.
Monitoring storage capacity using vCenter web client
vCenter web client displays capacity details about the vSAN datastore, including deduplication
and compression space efficiencies if enabled. The figure below shows the vCenter Storage
view for the vSAN datastore.
Figure 33. vCenter Storage, Monitor, Virtual SAN
Note the Deduplication and Compression savings and ratio. Deduplication and compression
savings vary but generally most datasets experience between 1.5:1 and 2:1 capacity savings.
For longer-term capacity planning and analysis, the performance view below shows storage
consumption trends. The dropdown allows you to select a time range of up to one year.
Summary of Contents for VxRail Appliance
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