Volumes; Naming; Protection And Load Balancing - Dell EMC VxFlex Ready Node User Manual
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Volumes
Naming
Protection and load balancing
select it in the Storage Pool (for more information on Storage Pool, see "Storage
Pools").
FG enables data compression which allows for faster reads and writes. Data-
compression is not supported for Medium Granularity (MG). It supports thin
provisioned, zero padded volumes. Zero padded is enabled by default for FG and can't
be disabled. Zero padding is disabled for MG.
FG supports persistent checksum for data integrity. For more information on
persistent checksum, see "Checksum protection".
You must add and configure volumes before enabling applications to access them.
The adding and mapping volume process is necessary, as part of the getting started
process, before applications can access the volumes. In addition, you may create
additional volumes and map them as part of the maintenance of the virtualization
layer.
You can configure the caching option when creating the volumes, or you can change
the Read RAM Cache feature later. If you want to enable the caching feature, ensure
that the feature is also enabled in the backend of the system, for the corresponding
Storage Pool and SDSs. For more information, see "Change Read RAM Cache volume
settings".
Define volume names according to the following rules:
Contains less than 32 characters
l
Contains only alphanumeric and punctuation characters
l
Is unique within the object type
l
VxFlex OS objects are assigned a unique ID that can be used to identify the object in
CLI commands. You can retrieve the ID via a query, or via the object's property sheet
in the VxFlex OS GUI. It is highly recommended to give each volume a meaningful
name associated with its operational role.
Giving meaningful names to VxFlex OS objects can simplify volume-related actions.
It is recommended to name all VxFlex OS objects with meaningful names. This will
make it easier when defining volumes, associating them with applications, etc.
From the previous example, the Storage Pools can be named "Capacity_Storage" and
"Performance_Storage," which allows you to identify the different tiers.
As for Protection Domains, one example would be separating the SDSs used by the
finance department from those used by the engineering department. This segregation
of different departments is very beneficial in many aspects (security being one of
them). Thus, one might name the domains "Financial-PD" and "Engineering-PD."
The Fault Sets could be called "FS_Rack01" and "FS_Rack02."
VxFlex OS maintains the user data in a RAID-1 mesh mirrored layout. Each piece of
data is stored on two different servers. The copies are randomly distributed over the
storage devices. Rebuild and rebalance processes are fully automated, but are
configurable.
Dell EMC VxFlex Ready Node AMS User Guide
Architecture
33
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