Cloud Data Warehousing Migration: How to Go About It in 2024?

Updated September 28th, 2023

Share this article

Traditional on-premises data warehouses have fixed capacities. When data grows or query demands increase, companies have to invest in new hardware increasing the cost. Cloud data warehousing migration, on the other hand, offers the ability to scale up or down based on the demands of the business.

Cloud data warehousing migration offers scalability and flexibility solutions helping businesses to efficiently manage and analyze their data and control costs more effectively than traditional on-premises systems.

Because of this dynamic nature cloud data warehousing migration has emerged as a key trend that is radically transforming how organizations handle their data.

Modern data problems require modern solutions - Try Atlan, the data catalog of choice for forward-looking data teams! 👉 Book your demo today

In this article, we will understand:

The importance and challenges of cloud data warehousing migration
A step-by-step breakdown of cloud data warehousing migration process

Let’s dive in!

What is cloud data warehousing migration?
Why does it matter?
Top 5 Challenges and their solutions
Cloud data warehouse migration strategy: A 10-step guide
Best practices
5 Key considerations for a cloud data warehousing migration
Related reads

What is cloud data warehousing migration?

Cloud data warehousing migration is like moving all your important documents, photos, and files from a big, heavy filing cabinet in your home to a secure, easy-to-access online storage system like Google Drive or Dropbox.

In the above analogy, the “filing cabinet” represents traditional data warehouses, which are physical servers or systems where businesses store and analyze their data. These are often located on-site at the company’s offices and require a lot of space, power, and maintenance.

The “online storage system” represents the cloud data warehouse, which is a service provided by companies like Amazon, Google, or Microsoft. This cloud warehouse securely stores and manages data over the internet, which makes it more flexible and accessible.

This process usually involves several stages, from initial planning and preparation, through the actual data transfer, to post-migration testing and optimization.

The main goal of this migration is to leverage the advantages of the cloud, including scalability, flexibility, cost-effectiveness, and enhanced data analytics capabilities. It’s a key component of many organizations’ digital transformation strategies, allowing them to store and analyze large volumes of data more efficiently and effectively.

Cloud data warehousing migration: Why does it matter?

Migration to a cloud data warehouse matters because it facilitates real-time data analysis, supports advanced analytics and machine learning, ensures data availability, and improves the overall data management capabilities of an organization. It can also be a key element in a broader digital transformation strategy, enabling businesses to become more agile and responsive to changes in their environment.

There are various approaches to executing a cloud data warehouse migration, each with its own pros and cons. Let’s look at some popular strategies.

Lift-and-shift migration
Application migration
Data re-architecting
Hybrid migration

Now, let’s dive deeper into each strategy sequentially and learn the importance of cloud data warehousing..

1. Lift-and-shift migration

Also known as “rehosting,” this approach involves moving the data warehouse to the cloud without making any significant changes to its structure or code.

It’s often seen as the quickest and least risky approach for cloud data warehousing migration since it doesn’t involve re-engineering the data warehouse.

2. Application migration

This method involves migrating individual applications or services to the cloud while keeping others on-premise. This selective cloud data warehousing migration can minimize the potential disruptions and risks associated with a full-scale migration.

3. Data re-architecting

Here, the existing data warehouse is significantly modified or entirely redesigned to better leverage cloud capabilities. This approach is often used when an organization wants to address existing limitations and performance issues.

4. Hybrid migration

In a hybrid approach, some elements of the data warehouse remain on-premise while others are moved to the cloud. This method allows businesses to enjoy the benefits of both environments. It might be ideal for organizations that want to gradually move to the cloud or have specific regulatory or security concerns about storing all their data in the cloud.

Each of these strategies requires careful planning and execution to mitigate risks and ensure the successful migration of the data warehouse. Therefore, it’s crucial for organizations to assess their specific needs, resources, and goals before choosing a migration strategy.

Cloud data warehousing migration signifies an important step towards leveraging modern data technologies. As such, organizations that successfully implement this process stand to gain a competitive edge in the ever-evolving data landscape.

Top 5 Challenges in cloud data warehousing migration and their solutions

The following are some of the most commonly encountered challenges in cloud data warehousing migration:

Data privacy and security
Data migration complexity
Cost management
Performance issues
Skills gap

How can we overcome them? Let’s dive in.

1. Data privacy and security

Cloud data warehousing migration can raise security concerns, as data outside an organization’s internal network is often perceived as more vulnerable.

Solution: Choose a cloud provider that offers robust security features, including data encryption, identity access management, and regular security audits. Ensure adherence to security best practices, like using strong, unique passwords and enabling multi-factor authentication.

Learn more: Data privacy and security

2. Data migration complexity

Cloud data warehousing migration can be a complex and time-consuming process, especially when it involves transferring large amounts of data between different formats or systems.

Solution: Utilize automated migration tools that can handle bulk data transfer and data transformation. Also, consider breaking down the migration process into smaller, manageable tasks. Engaging the services of experienced professionals can also help manage the complexity.

3. Cost management

While cloud services can be more cost-effective in the long run, the initial migration process can be expensive, particularly if unexpected challenges arise.

Solution: Conduct a thorough cost analysis before starting the migration, considering both immediate and ongoing costs. Also, leverage the pay-as-you-go model offered by many cloud providers to scale your costs with your usage.

4. Performance issues

The performance of the data warehouse might suffer during and immediately after the migration, affecting the organization’s operations.

Solution: Plan the migration during off-peak hours to minimize disruption. Test the performance of the new setup thoroughly before going live. It’s also crucial to optimize the cloud setup for performance, such as using appropriate storage and compute resources.

5. Skills gap

Cloud data warehousing requires a different skill set than traditional data warehousing. There might be a lack of in-house expertise to manage the cloud data warehouse.

Solution: Invest in training and development to upskill the existing staff. Alternatively, consider hiring new personnel with the necessary expertise or outsourcing to a reliable cloud management service provider.

By identifying and addressing these challenges, businesses can make informed decisions, ensure data governance, and optimize their cloud data warehousing initiatives for improved business insights and decision-making.

Cloud data warehouse migration strategy: A 10-step guide

Let us now look at a practical strategy for your cloud data warehouse migration.

Knowing this step-by-step process will empower you to leverage the versatile benefits of successful cloud data warehousing migration and future-proof your data infrastructure.

Preparation and assessment
Choosing a cloud provider
Migration planning
Proof of concept
Data preparation
Migration execution
Performance tuning
Testing
Switch over
Monitoring and optimization

Let’s dive deeper into them.

1. Preparation and assessment

The first step is to assess your current data warehouse setup, understand the volume and type of data, and identify any potential challenges for the migration. This includes reviewing the performance, security, and cost aspects of the current system.

2. Choosing a cloud provider

Evaluate different cloud service providers based on your specific needs. This includes considering factors like security features, scalability, cost, and the availability of support services.

3. Migration planning

Develop a detailed migration plan. This should outline the migration strategy (such as lift-and-shift, data re-architecting, etc.), schedule, and responsibilities.

4. Proof of concept

Before committing to a full-scale migration, perform a proof of concept by migrating a small, non-critical segment of your data warehouse. This will help identify potential issues and adjust the plan as needed.

5. Data preparation

Clean up your data to remove redundancies, inconsistencies, or outdated information. Standardize the data formats if necessary.

6. Migration execution

Start the migration according to your plan. This could be a phased approach where you migrate data over time, or a ‘big bang’ approach where all data is migrated at once.

7. Performance tuning

Once the data is in the cloud, you’ll likely need to adjust your setup for optimal performance. This could involve tweaking your data partitioning, indexing, or compression methods.

8. Testing

Perform comprehensive testing to ensure data integrity and the performance of the new setup. This includes testing for data accuracy, system performance, and security.

9. Switch over

Once you’re satisfied with the testing results, it’s time to switch over to the cloud data warehouse for your live operations.

10. Monitoring and optimization

Even after the migration is complete, you should continuously monitor your system to ensure everything is running smoothly. Use this data to optimize your setup, making necessary adjustments to improve performance, reduce costs, or enhance security.

Remember that migration can be a complex process, and every organization’s needs will be slightly different. It’s often helpful to get advice from experts who have managed similar projects in the past, or to engage with professional services offered by your chosen cloud provider.

5 Best practices for effective cloud data warehousing migration

Understanding the best practices is crucial to ensuring a smooth and successful transition of data and applications from on-premises systems to the cloud.

Here are the 5 best practices for cloud data warehousing migration:

Establish clear objectives
Choose the right migration strategy
Involve stakeholders early
Prioritize data governance and security
Plan for post-migration optimization

Let’s understand each one of them in detail.

1. Establish clear objectives

Before starting the migration, define your objectives clearly. Are you trying to improve scalability, save costs, enhance data analytics capabilities, or a combination of these? Your objectives will guide your choice of cloud provider and migration strategy.

2. Choose the right migration strategy

As mentioned earlier, there are different migration strategies, including lift-and-shift, application migration, data re-architecting, and hybrid migration. Each has its pros and cons, and the best choice depends on your specific needs and context.

3. Involve stakeholders early

Include all relevant stakeholders, such as data users, IT team, and management, in the planning and decision-making process. This will help ensure that everyone’s needs are considered and can promote buy-in and cooperation.

4. Prioritize data governance and security

When moving to the cloud, maintaining data governance and security is crucial. Make sure your new setup complies with all relevant regulations and industry standards. Use encryption for data at rest and in transit, and manage access rights carefully.

5. Plan for post-migration optimization

Migration is not a one-time process; you’ll likely need to optimize your setup after the migration. This can involve adjusting resource allocation, re-indexing data, or refining your data organization to better fit the cloud environment. Continuously monitor your system’s performance and make adjustments as needed.

Bottom line: Every migration project is unique, and what works best for one organization might not be ideal for another. However, these practices can serve as a useful starting point for most cloud data warehousing migration projects.

5 Key considerations for a cloud data warehousing migration

Cloud data warehouse migration is a significant decision that involves many considerations. Understanding these factors will ensure that the migration process is efficient, cost-effective, and aligns with your business goals.

Here are the 5 crucial factors to consider when deciding what to migrate in a cloud data warehousing migration:

Data relevance and usage
Data integrity and quality
Integration needs
Security and compliance
Cost implications

Let us understand each of them in detail.

1. Data relevance and usage

Priority data: Before starting the migration, it’s important to determine which datasets are frequently accessed or hold business value. Prioritizing these datasets can streamline the migration process.
Legacy data: Older datasets that aren’t frequently accessed might not need to be immediately migrated. Consider archiving them or using a hybrid solution where they remain on-premises until needed.

2. Data integrity and quality

Consistency: Migrating inconsistent data can lead to further issues in the cloud. It’s essential to clean and validate data before cloud data warehousing migration to ensure it’s free from errors.
Deduplication: Duplicate data can increase storage costs and cause confusion. Ensure that the data is unique and that any redundancies are resolved before migration.

3. Integration needs

Existing systems: Think about how your data interacts with other applications and systems. If certain datasets are deeply integrated into your current operational workflow, you’ll need to ensure that these integrations are maintained or reconfigured in the cloud.
APIs and endpoints: If your datasets communicate with external systems through APIs or other endpoints, ensure that these connections are supported in your cloud environment.

4. Security and compliance

Data sensitivity: For datasets that contain sensitive or personal information, security during the migration and in the cloud environment is paramount. Make sure that the cloud provider offers robust security measures.
Regulations: Depending on your industry, there might be regulations governing how certain types of data can be stored and processed in the cloud. Make sure your migration complies with these rules.

5. Cost implications

Storage costs: Cloud providers typically charge based on the volume of data stored. Migrating vast amounts of unnecessary data can increase costs.
Migration costs: Some datasets might be more expensive to migrate due to their size or complexity. Weigh the benefits of having this data in the cloud against the costs of migrating it.

In conclusion, a cloud data warehousing migration isn’t just a technical endeavor but also a strategic one. By focusing on these five crucial factors, businesses can ensure a smoother transition, better data management, and optimal utilization of cloud resources.

Recap: What have we learnt so far?

Cloud data warehousing migration: This process, which involves transferring an organization’s data warehouse from an on-premise setup to a cloud environment, holds significant potential to enhance the scalability, flexibility, and cost-effectiveness of an organization’s data management.
Challenges and solutions: Key challenges in cloud data warehouse migration include data privacy and security, data migration complexity, cost management, performance issues, and skills gap. Through strategies such as selecting a secure cloud provider, using automated migration tools, performing detailed cost analysis, and investing in training or new hires, organizations can overcome these obstacles.
Migration steps: A successful cloud data warehouse migration typically involves preparation and assessment, choosing a cloud provider, detailed migration planning, proof of concept, data preparation, migration execution, performance tuning, rigorous testing, switch over, and continuous monitoring and optimization.
Best practices: Clear objectives, choosing the right migration strategy, involving stakeholders early, prioritizing data governance and security, and planning for post-migration optimization are all critical to a successful cloud data migration.
Choosing what to migrate: Factors such as data sensitivity, usage and accessibility, integration requirements, cost implications, and performance considerations all play a part in determining what data to migrate and what to retain on-premise.

The cloud data warehouse migration is a complex yet transformative process that can provide organizations with significant long-term benefits. The right approach, supported by thorough planning and careful execution, can enable an organization to maximize these benefits while minimizing the associated risks and challenges.