Common OCI Migration Challenges and How to Avoid Them
Planning to migrate your workloads to Oracle Cloud Infrastructure (OCI)? It looks like a clean move. But what happens when an application is depending on some overlooked system, or when costs exceed expected or sometimes a workload just does not perform as planned? Those are some of the OCI migration challenges that can turn a smooth transition into a more challenging process.
There are multiple OCI migration roadblocks that arise along the way, from unclear dependencies and surprise spending to security worries and application compatibility quirks. The good news though is that most of these issues can be identified at an early stage, and resolved through right assessment, step by step planning, and repeated testing.
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Which are the Common OCI Migration Challenges?
Some of the important challenges with OCI migration include application dependencies, data transfer, network setup, security demands, workload digestibility, cost planning, lack of preparedness, etc.
1. Incomplete Assessment of Existing Workloads
The foremost OCI migration roadblocks can arise when you decide to move without having complete understanding of your existing IT environment.
Applications rarely operate independently. A single business application may depend on databases, storage systems, APIs, authentication services, scheduled jobs, network routes, or third-party applications. If these dependencies are missed during discovery, an application may not function correctly after it is moved to OCI.
How to Avoid It
Starting with the evaluation of present environmental status. The following list must be taken into consideration:
- Applications and workloads
- Servers and operating systems
- Databases and storage
- Dependencies of applications
- Network ports and connections
- Integration points
- Performance requirements
- Backup and recovery needs
- Conditional and security requirements
Create application dependency maps and classify workloads according to their importance for business as well as complexity and readiness for migration. This would provide an appropriate basis for decision making while migrating workloads.
2. Application Compatibility and Legacy Dependencies
Not every application is prepared for cloud adoption as it stands. Older software may depend on certain operating system versions, hardware configurations, libraries, database versions, or network configurations.
This creates oracle cloud migration problems when things do not go according to plan. An application that is functioning properly in the on-premises environment may experience some unexpected after a transition has been made.
How to Avoid It
Before the migration to the cloud, you may want to test applications. You may want to conduct a pilot migration first before you completely migrate complex workloads. Each application should be classified based on whether it involves:
- Rehosting with minimal modifications
- With some minor alterations done prior to migration
- Refactoring so that it is better suited for the cloud
- Changed by another technology
- Retained in the current environment temporarily
A workload-by-workload approach is more efficient than treating it as a one migration project.
3. Networking and Connectivity Challenges
The layout of the network is another major issue when moving to OCI. It becomes even clearer for those who want to maintain hybrid systems with their own infrastructure.
Whenever communication is required with a database, users, an external system, or even a hardware device located on premises. It is important to get the entire flow to work smoothly. Otherwise, some misconfigurations may block or break this crucial communication.
To avoid that trouble, make sure to design your future network before moving applications to the OCI. Consider the following things:
- Virtual Cloud Networks (VCNs)
- Subnets
- Routing
- Security lists and network security groups
- DNS requirements
- Firewall rules
- Connecting on-premises infrastructure to OCI
- Bandwidth and latency
Perform testing of the network before moving the dependent apps. This will help you fix any misconfiguration before production is disturbed.
4. Data Migration and Downtime Problems
Moving large databases and data repositories can create difficulties in migration. In the process of migrating large volumes of data, it is important to have proper planning regarding the method of transfer, bandwidth, synchronization, verification, and downtimes.
Data migration can also be one of the most serious cloud migration risks if the companies do not implement appropriate procedures for backup and recovery.
How to Prevent It
Establish some data migration process for every important workload:
- Volume of data and time of transfer
- Dependencies of databases
- Allowed downtime
- Synchronization of data
- Backup and recovery methods
- Validation of data moved after migration
If it is essential for workloads, perform a test migration before the main cutover and compare the source and target environment to make sure that the data was correctly transferred.
5. Security and Compliance Gaps
Security cannot be considered to be the last stage of an OCI migration. Migrating workloads without checking identity and access control, and security regulations may create unnecessary risks.
Companies working in regulated environments should also be compliant with the requirements related to data protection, access management, auditing, and retention.
How to Avoid it
Define security requirements in the planning process. Ensure that adequate controls are in place for:
- Identity and access management
- Least privilege access
- Encryption
- Network segmentation
- Logging
- Backup
- Secret and credential management
- Security auditing
Analyze the target environment according to the organization and regulation requirements before deploying workloads.
6. Unexpected Cloud Costs
Migrating to the cloud will not always cut costs. Issues with workload sizing, extra resource costs, improper storage configurations, and inadequate consumption monitoring could lead to increased expenses.
Cost uncertainty is one of the cloud migration risks to be considered before workloads are moved.
How to Avoid It
Make an estimate based on workloads instead of general estimates. Review:
- Compute needs
- Storage use
- Database needs
- Network traffic
- Backup plans
- Disaster recovery measures
- High availability needs
- Projected workload growth
After migration, track the use of resources and adjust the capacity when the usage differs from the initial estimate.
7. Inappropriate Migration Sequencing
Carrying out cloud migration in the wrong order can cause unnecessary dependencies and interruptions in business activities.
If an application is moved before the necessary components such as database, authentication service, or integration platform have been prepared, then the application will not work properly.
Poor sequencing is one of the common cloud migration mistakes that will turn a migration that is technically possible into a troublesome task.
How to Avoid It
Form migration waves according to workload dependencies and the importance of business processes.
A sequence may look like this:
Assessment → Pilot Workloads → Low-risk applications → Workloads that are interdependent → Important Applications → Optimization
The process starts with failure-free experimental migrations of less important workloads, enabling the team to verify the effectiveness of the process beforehand.
8. Types of Skills and Unclear Responsibilities
When migrating to OCI, it is important to have familiarity in multiple areas like infrastructure, networks, databases, security, and operation. Although the team might be knowledgeable in the current setup, they will not have adequate knowledge about OCI architecture.
This gap creates issues during the process of implementation when solving problems becomes more tedious.
How to Prevent It
Identify any gaps in technical knowledge before launching your project. Assign clear roles in:
- Migration planning
- Infrastructure set up
- Network development
- Database migration
- Security measures
- Testing
- Implementation
- Post-migration help
Organizations can also cooperate with experienced Oracle Cloud migration consultants when their own staff does not have sufficient technical knowledge.
Lacking the right OCI expertise for your migration?
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What are the Best Ways to Overcome OCI Migration Challenges?
To overcome OCI migration challenges, it is essential to consider the process of migration as a solid business and technical initiative instead of just moving servers from one environment to the other.
This implies the following solutions:
1. Preparing Before Migration
Make sure you document workloads, dependencies, technical requirements, priorities, and existing infrastructure.
2. Create a Proper Migration Plan
Assess and choose which migration strategy is the best for each workload instead of employing the same method for all applications.
3. Run Tests Prior to Production Transition
Utilize pilot migrations and testing environments to verify application functioning, network connectivity, data integrity, and performance.
4. Create a Rollback Plan
Every important migration requires a fallback process documented. The teams involved should know when to call a stop to migration and how to get back to normal operation in case of some unpredicted problems.
5. Post-Migration Monitoring
The migration process does not end once the workloads are running in the OCI environment. It is paramount to monitor the performance, security, availability, and expenses of the newly running workloads.
This is the key principle of a successful OCI migration project and will help to avoid surprises along the way.
How Migration Ready is Your Environment?
Identify potential gaps, dependencies, and risks before they become OCI migration roadblocks. Assess your OCI readiness and prepare your workloads for a smoother migration with Evolvous.
A Simple OCI Migration Readiness Checklist
Before starting the migration process, it is important to analyze the organization’s technical, operational, compliance, and financial readiness to identify gaps beforehand.
- Have all workloads been identified?
- Are dependencies among applications made clear?
- Is the representation of the final OCI architecture available?
- Has the connectivity checked?
- Are security and compliance requirements defined?
- Is the migration approach determined for the workloads?
- Is the backup and recovery mechanism in place?
- Has the expected downtime been established?
- Have the costs for migration been calculated?
- Have the workloads been piloted?
- Is rollback strategy available?
- Have post-migration monitoring strategies been defined?
If you cannot confidently answer a considerable number of questions, you may need to reconsider your migration plan.
How Evolvous Can Help Address OCI Migration Challenges?
To successfully migrate to OCI, selecting the right cloud services and moving workloads is not enough. Evolvous supports companies in understanding the present environment and determining dependencies, migration requirements, in addition to creating an OCI setup and planning the migration process.
Evolvous reduces uncertainty and manages risks through the entire migration process from assessing workload and planning the architecture to migration execution and after migration assistance.
Can an unnoticed dependency delay your OCI migration?
Contact Evolvous today and eliminate obstacles while creating an implementable OCI migration plan.
