Understand Move Bundle Sizes & Schedules
Since VAiLPLEX allows you to define each move ‘bundle’ by application, server type, workload, ports, protocols or other criteria, it is then also possible to manage that set of servers/workloads in many ways.
One important task our customers need to be able to perform is bundle scheduling and to visually represent ‘dependencies’ between groups/bundles. VAiLPLEX allows each move group/bundle to be ‘scheduled’ along with any pre-requisite or dependencies also defined and visually presented.
Transition Move Events & Schedules
Move events are also defined in VAiLPLEX. The name of the event and the expected duration is provided and can then be referenced and assigned to any move bundles that have been created.
Start and Stop Schedules can be defined in each Transition Event. Each schedule field allows a calendar pop-up to use for selection.
Notice in the figure to the right we have identified any bundles that are already assigned to any certain move event.
Transition Event Dependecies
If a Transition Event requires another workload set to complete prior to this workload being relocated, that dependency can be set here. It will be used to draw the dependency relationships in the Transition Event Gantt Chart, discussed below.
Transition Event Types
Transition Events are typically defined as ‘test’, or ‘prod’, etc. VAiLPLEX provides the ability to define Transition Events using the following values (and more can be added, if required):
Move Bundle Timeline/Schedule Gantt Chart
Once the move event schedule has been assigned to the bundle, the resulting timeline can be viewed in a standard gantt chart format. The view can be zoomed as required to see detail down to the hourly level.
Network Capacity & Utilization Modeling
A combination of Sandpiper Data Migration Services and VAiLPLEX allowed this customer (confidential) to verify that the current network would not support the expected preparation/replication activities needed pre-move and the workloads that were expected to converse between sites post-move event. Rather than needing to procure very expensive short-term network capacity the bundles were reworked so that the current network could support the required workloads.
An optional ‘Site-to-Site’ module within VAiLPLEX allows any visual component diagram to calculate the expected network loads that would consume bandwidth is they were to be relocated to the new site. Simply drag an icon to the right of the site-to-site bar, and the capacity needed to support that workload is calculated for you. An example of this is shown in the first diagram to the left.
Move Bundle/Workload Network Impact
The VAiLPLEX Metrics Collector allows the size for each move bundle to be calculated. For workloads to be relocated, ‘T-Minus’ (Preparation) tasks to replicate data to the new site will consume network bandwidth. Once the workloads are moved to the new site, some activity may need to communicate back to the original site until all moves for that workload have been completed. The combination of the replication workloads for preparation tasks and the communication between sites for the ‘Business as Usual’ (BAU) workloads needs to be understood and accounted for.
Map the Modeled Network Loads to the Actual Capacity
The diagram to the left indicates that with the planned network loads to replicate servers as part of T-Minus plus the loads needed for post-migration processing that the network bandwidth either planned for or that exists currently will be exceeded approximately half-way through the migration project. By restructuring the move group bundles it is possible to ensure the workloads will fit within the bandwidth available (next diagram). These diagrams are provided as part of the Sandpiper Relocation Services using information from the VAiLPLEX appliances.
The Migration ‘Bell Curve’
What can easily be seen in this analysis model is the workloads across the network will increase as more data is replicated to the new site and more workloads are started that still converse back to the original site. This network load will increase until a ‘tipping-point’ is reached, where we actually have more workloads now moved to the new site and the amount of load back to the original site starts to decrease, until the migration project completes.
How to License VAiPLEX
Sandpiper provides this solution either as a stand-alone appliance or we can provide it as SaaS (‘Software as a Service’), or a subscription-based service. If you require assistance with the setup, discovery, metric ingest, configuration or management of the process, these can all be included by Sandpiper as part of your project.
For more information on the Sandpiper VAiLPLEX product, please contact us or download the Sandpiper_VAiLPLEX_Overview_V5