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Best practices for Live Migrate and Volume Advisor
12 Dell EMC SC Series Live Migrate and Volume Advisor | 3186-BP-SC
a particular source replication QoS node must share the limitations of that QoS, regardless of destination
array. This can result in a Live Migrate taking longer than necessary (for example, the QoS node used was
designed to protect remote replication network links from bandwidth saturation). Create a separate source
replication QoS node for use with Live Migrate, and other local migration needs, to avoid this issue.
Automatically Swap Roles After In Sync: It is recommended to leave this check box is in its default
checked state. This enables Live Migrate to present the volume on the destination array as the target volume,
and take the volume on the source array offline. The benefit of this is that writes are only committed to the
volume on the destination, and not replicated back to the original source volume. See section 1.1 for
additional details.
Deduplication: It is not recommended to enable replication deduplication. This feature is beneficial when
replicating volumes over lower bandwidth WAN links by reducing the amount of data to be transmitted, at a
cost of increased load on the SC Series controller processor. Local replication, as is the case with Live
Migrate, is not bandwidth bound.
Data protection and disaster recovery: While Live Migrate is nondisruptive from an I/O and application
perspective, it can potentially affect backup/recovery and HA/DR procedures. It may be necessary to update
those procedures to reflect the relocation of the volume to a different SC Series array.
Data Collector Schedules: DSM alerts are generated based on data gathered by the Data Collector, and
Volume Advisor recommendations are based on these alerts. To alert and receive Volume Advisor
recommendations more aggressively, tune the data gathering to occur more frequently than the default
values.
Optimizing Storage Center Report Gathering Settings for Volume Advisor