Note: For more information about customer’s current IBM i systems, see this Seismic web page (log in required).

Note: Bolivia and Brazil are in the same continent (South America); therefore, this use case includes multiple zones. The cities of La Paz and Sao Paulo cities are separated by 3000 kilometers (1684 miles). For more information about multi-zone regions, see this LIBM Cloud Docs web page.

Note: A maintenance contract, an activation key of the logical replication, and installation and configuration that done by the third-party vendor often are needed for this process.

Requirement	Description
Management services for IBM i.	Support for IBM i operating systems.
Provide backup services.	IBM Cloud Object Storage is used as backup-services.
Provide multi-site HA solution.	Multi-site infrastructure to be provided in Sao Paulo (dual sites).
Dual sites high availability.	The use of any third-party vendor solution on logical replication to establishing DR between SAO01 and SAO04.
Provide fault tolerant LAN infrastructure in IBM Cloud.	Provide network connectivity for application and servers.
Data replication between IBM Cloud and customer data center.	The customer uses a logical replication solution to replicate the data for the IBM i application.
Provide traffic isolation and segmentation.	The use of jump servers and traffic filtering on IBM Cloud.
Provide WAN connectivity.	Customer provides WAN circuit and the POP network infrastructure; IBM provides the termination endpoint in Sao Paulo.

Note: For more information about Worldwide Tools Solutions (WWTS), see this IBM Support web page.

Architectural decision	Front-end accounts that are used for accessibility and provisioning some services.
Problem statement	Providing a way for accessing the target Power VS, which is moved from the customer’s data centers to IBM Cloud in Sao Paulo in a dual site configuration.
Assumptions	Customer provides the WAN connectivity up to the network PoP Equinix1 that is next to the data center.
Motivation	Standard design for this type of solution.
Alternatives	None.
Decision	Deploy front-end account and services.
Justifications	For accessibility of the PowerVS, a front-end zone is needed. Some services are provided, such as the control of network traffic (firewalls), a relay environment for accessing the target IBM i images, and a Proxy for IBM Cloud Object Storage access.
Implications	Deploy WAN access and replication method for moving the data in the target environment.
Derived requirements	•Provide firewall services for VPN access and filtering of traffic. •Provide IBM Cloud Object Storage services for Backup. •Provide WAN network connectivity for customer’s users and application connectivity. •Provide bare metal servers to hosts relay applications and proxy.

Important: Consider the following points: •By using Equinix, you can get a direct link to reach IBM Power Systems Virtual Server over Direct Link Connect. From Equinix, you also can get a cross connection to Megaport and connect to IBM Power Systems Virtual Server directly. •Before you begin, determine the location connection to IBM Cloud by verifying your colocation provider’s or service provider’s capabilities to reach the Meet-Me Room and cross-connect into IBM Cloud. For more information, see this web page. On SAO01, the location type and Meet-Me Room (MMR) Operator, is DC and Digital Realty (Ascenty), and SAO04 DC(AZ1) and ODATA. In this example, to lift and shift IBM i VMs from Bolivia to Brazil, the connection from Bolivia to SAO01 can be established. For example, you must contract directly with a carrier that can provide enough capacity and presence in any Ascenty data center. The solution might be LAN-to-LAN + Cross Connection Fiber Optic + IBM DirectLink 1 G or 10 G. For the LAN-to-LAN link, IBM must directly contract with the carriers for the private LAN-to-LAN circuits. For example, the following carriers and the location of the Ascenty data centers are used:  – ALGAR TELECOM  – ALOO TELECOM  – AMERICANET  – ANGOLA CABLES  – BRDIGITAL, LUMEN  – COGENT  – SEABORN  – CLARO - PRIMESYS - EMBRATEL  – Durand/Tavola  – HOSTFIBER  – MEGATELECOM  – MUNDIVOX  – NETELL  – NEUTRONA NETWORKS  – NOVVACORE TELECOMUNICAÇÕES  – OI MOVEL  – Seaborn  – SILICA NETWORKS  – VIVO  – VOGEL  – WCS TELECOM For more information about Digital Realty (Ascenty) and ODATA, see the following web pages:  – Ascenty  – ODATA

Architectural decision	Dual site infrastructure is required for HA purposes.
Problem statement	If a major outage occurs, the customer’s users can connect to back up site (use of DNS for servers translation; secondary site has a different TCP IP address).
Assumptions	Two sites are used for the solution: one in SAO01 and the other in SAO04 (in a different zone).
Motivation	Infrastructure recovery if a major outage occurs.
Alternatives	None.
Decision	Deploy dual site solution in an IBM Cloud Multi-Zone Region (Sao Paulo).
Justifications	If a major outage occurs at the primary site, the main goal is to restart part of the application and services in the secondary site.
Implications	Deploy a secondary site in addition to the Production environment.
Derived requirements	•Provide WAN network connectivity to secondary site for customer’s users and application connectivity. •Duplicate part of the primary infrastructure in backup site.

Architectural decision	IBM Cloud Object Storage backup is used for migrating IBM i VMs to SAO01 and SAO04.
Problem statement	Back-up and data replication between client data center and IBM Cloud target infrastructure. No Automatic Tape Library (ATL) or VTS is available to perform a save and restore, which is a traditional migration method for IBM i operating system.
Assumptions	The use of IBM Cloud Object Storage for the migration is one of the available methods for moving workload to IBM Power Systems Virtual Server in IBM Cloud.
Motivation	The use of IBM Cloud Object Storage to move IBM i workloads to SAO01 and SAO04.
Alternatives	The use of IBM Cloud Object Storage for migration. The use of Master Data Management (MDS) device for the migration. Transferring IBM i image OVA file to IBM Cloud Storage by using IBM Power Virtualization Center.
Decision	IBM Cloud Object Storage is used.
Justifications	•Master Data Management is excluded because of the delay for taking backups data on 1 Gbps interface. •Customer does not have a virtualization by PowerVC.
Implications	Network connectivity includes VPN WAN connectivity and Proxy in front-end account.
Derived requirements	•Deploy Proxy in Front-End zones and VPN access from client on IBM Cloud. •Buckets are needed to create on IBM Cloud Object Storage for the data move. Needs more storage for the IBM Cloud Object Storage backup in the source IBM i VM.

Architectural decision	A third-party vendor replication solution is used.
Problem statement	Customer has IBM i VMs with storage 10 TB - 70 TB. Some of the IBM i VMs include a journal of 1 TB that generates daily. The use of a logical replication tool is the best solution to remove the delta data after the IBM i VM restoration on the target is complete.
Assumptions	The logical replication tool syncs up the data between source system and target system.
Motivation	Customer uses a logical replication.
Alternatives	PowerHA for IBM i geographic mirroring.
Decision	The use of the current third-party vendor tool.
Justifications	In this case, this option is the most suggested because customer has a third-party logical replication tool in support.
Implications	Third-party vendor provides license key for the logical replication tool to be deployed on IBM PowerVS. The third-party vendor installs the tool in the cloud.
Derived requirements	The third-party vendor provides a temporary license key to migrate data to IBM Cloud.

Note: PowerHA Geo mirroring in the IBM Power Systems on IBM Cloud does not include any unique features. It is host-based and done over a TCP/IP connection. The only possible unique part is that you must design the network between the two servers, but that requirement is not unique to PowerHA. Geo Mirroring includes limitations, such as it works for IASP only, with which a customer cannot be configured.

Architectural decision	WAN direct-link connectivity to be redundant: one primary and one secondary link.
Problem statement	WAN access connectivity to be recovered in case of primary link outage.
Assumptions	WAN part is customer’s responsibility, IBM Cloud provides dual circuit connectivity on diverse physical devices.
Motivation	Maintain connectivity with customer’s corporate network.
Alternatives	Doubling the WAN connectivity: a redundant connectivity in SAO01 and a redundant connectivity in SAO04.
Decision	Provide redundant connectivity in SAO01 and use the IBM Cloud backbone for Inter-site communications.
Justifications	The provided service level is consistent and the option is available to connect the IBM Cloud site by using VPN.
Implications	Deploy Sao Paulo site-to-site connectivity.
Derived requirements	Deploy GRE and Direct link connectivity for Front-End zones communications.

Important: Tables Table 7-2 on page 249 - Table 7-5 on page 252 list decisions only as an example. Real world decisions can vary according to the customer, scenario, third-party vendor applications, in-house applications, region, networking, and so on. A certified IBM i architect can help make decisions about your scenario.