Operation after Switchover

When Resuming Replication of the Disk of the Switchover Information Storage Folder for Continued Switchover Being Performed in Phases

When using the replication function of a storage unit to replicate the LUN on which the switchover information storage folder exists between sites, in preparation for the next switchover, execute the following operations on the switchover source site or the site on which replication was defined.

On the switchover destination site, unmount the "switchover information storage folder" disk that was mounted in "4.2.5 Mounting the Switchover Information Storage Folder [Switchover Destination Site]".
In the switchover source site or the site on which replication was defined, resume the replication of the disk containing the "switchover information storage folder" from the switchover source site to the switchover destination site, which was stopped in "4.2.4 Stopping Storage Replication [Switchover Source Site or the Site for Which Replication Definitions Have Been Created]".

Example

Example for the "switchover information storage folder" to be unmounted

[Windows Manager]

E drive

[Linux Manager]

/DRImport

When Performing Tenant Switchover while the Switchover Source Site is Operating

For global resources shared with the tenants for which switchover is not performed and the resources of L-Server templates, the same resources may exist in both the switchover source and destination sites. When modifying the settings of the corresponding resources, perform the same modifications for the resources of the two sites.

For example, when editing L-Server template A in the switchover destination site, edit L-Server template A in the switchover source site using the GUI or the CLI in the same way.

When the Accounts Manager Invoices Usage Charges

The procedure is as follows.

Invoicing Usage Charges

The person responsible for billing calculates and invoices tenants for usage during the month when a disaster occurred based on the usage charge file for the month at the switchover source site sent by the infrastructure administrator and the usage charge file sent from the switchover destination site. The calculation procedure using the files mentioned above is as follows.
1. Extract usage charge detail files
  
  Extract usage charge files from both the switchover source site and destination sites, and obtain usage charge detail files for each L-Platform. The name format of the usage charge detail files is as follows.
  
  For details, refer to "15.4.6.2 Usage charge Detail File" in the "Operation Guide CE".
  
  File Name
  
  yyyyMM_L-PlatformID.csv
2. Prevent duplicate charging for products charged monthly
  
  For each L-Server in the usage charge detail file, if the UsageFrequency column for the image, CPU, and memory is set to "1 month", compare the values of the ItemAmount columns in the usage charge detail files from the switchover source site and the switchover destination site and delete the row with the lower value. For the rows for the disks, delete only the rows with the same size and pool name from the switchover source site usage charge file. If there are multiple pairs of rows with the same size and pool name, delete only one for each pair. If there are no products being charged monthly, then this operation can be omitted.
3. Merge usage charge detail files
  
  For each L-Platform, copy the rows after line 2 of the csv data of the switchover destination site and add them to the end of the usage charge detail file from the switchover source site.
4. Calculate the usage charges of L-Platforms
  
  Calculate the usage charges of L-Platforms. Total the values of the ItemAmount column of the usage charge detail file.
5. Calculate the usage charges of tenants
  
  Perform steps b to d for every L-Platform and total the usage charges of L-Platforms to calculate the tenant usage charge.

When Tenant Switchover was Performed

The following limitations apply to L-Platform templates:

Image information referencing a cloning image in a global pool may be unavailable.
Segment information referencing a network resource in a global pool may be unavailable.
Deployment fails if you subscribe to using an L-Platform template containing unavailable image or segment information.

This unavailable template information becomes available when the resources of all the global pools are switched over.

When Switchover Was Performed Using the Active-Active Operation

After switchover, do not mix resources that have been switched from the switchover source site with resources that were already on the switchover destination site. If mixed, resources cannot be found and failback will fail.

Patterns where resources are mixed are as follows:

When linking global pools that were already on the switchover destination site to the tenants switched over using DR
When linking global pools switched over using DR to the tenants that were already on the switchover destination site
When moving resources that were already on the switchover destination site to the global pools switched over using DR
When moving resources switched over using DR to the global pools that were already on the switchover destination site
When creating an L-Platform/L-Server using both the resources switched over using DR and those that were already on the switchover destination site

In order to identify on which site the corresponding resources were created, it is recommended to add their site names to the beginning of the resource names.

For details, refer to "2.6.3 Items to Be Different between the Switchover Source and Destination Sites".

Do not change the name of resources that were created during switchover.

When Additional Recovery Is Planned

When additional recovery is planned on the switchover source site after the switchover operation, do not perform the following operations.

Unmounting or deletion from VM hosts and physical servers on disks used by the following resources which are to be restored, on the switchover source site
- L-Servers
- L-Platforms
- Tenants
- Image Resources
Reuse of disks used by the following resources which are to be restored, in the switchover source site
- L-Servers
- L-Platforms
- Tenants
- Image Resources
Editing and deletion of L-Platform templates used for deployment of L-Platforms outside the switchover, on the switchover destination site

When Switchover Was Performed Using the Blade Chassis Degradation Configuration

When switchover was performed using the blade chassis degradation configuration, perform the following operations after the switchover, as necessary.

Network resources using LAN switch blades to be degraded as external connection ports are created in the switchover destination site without port specification. Configure the external connection ports of network resources as necessary.

For details, refer to "5.4.4 Configuring VLANs on LAN Switch Blades" in the "User's Guide for Infrastructure Administrators (Resource Management) CE".
When virtual L-Server switchover (VM guest) is performed, confirm that the virtual network created on the VM management software is automatically configured. If the virtual network is not configured automatically, refer to the information on virtual networks shown in the VM profiles of the target VM and create a virtual network with the same name as the switchover source site on the VM host.

When Resuming Replication of Disks belonging to the Replication Target Storage Pool after the Switchover Source Site is Recovered

When performing virtual L-Server switchover (VM guest), ensure that the datastore used by resources switched to the switchover destination site cannot be referred to by VM management software, after recovery of the switchover source site. For details, refer to "LUNs with FC, iSCSI, or NAS connections" of "Table 3.1 Replication of Storage Units" in "3.1 Pre-setup Preparations".

For all switchover methods, resume the replication of the disk containing "the disk resources and virtual storage resources which are stored in the target storage pool for replication" from the switchover source site to the switchover destination site, which was stopped in "4.2.4 Stopping Storage Replication [Switchover Source Site or the Site for Which Replication Definitions Have Been Created]" in the opposite direction, in preparation for future switchovers.

4.3 Operation after Switchover