Why Businesses Move to the Cloud

Cloud migration—moving applications, data, and services from on-premises infrastructure to cloud platforms—has become standard practice for Australian businesses. The drivers are compelling:

Reduced capital expenditureNo more purchasing and maintaining servers. Pay for what you use.

ScalabilityResources grow and shrink with demand. No capacity planning headaches.

AccessibilityStaff access systems from anywhere with internet connectivity.

Disaster recoveryCloud providers offer built-in redundancy and backup capabilities.

Maintenance offloadedThe cloud provider handles infrastructure maintenance, security patches, and updates.

However, migration isn't automatic. Poorly planned moves create disruption, unexpected costs, and security gaps.

Assessment Phase

Before moving anything, understand what you're starting with:

Inventory Current Systems

Document:

What applications and systems you run
Where data is stored
How systems connect to each other
Who uses each system and how
What dependencies exist

Many businesses discover forgotten systems during this inventory. Better to find them now than during migration.

Evaluate Cloud Suitability

Not everything should move to the cloud. Consider:

Good cloud candidates:

Standard business applications (email, productivity)
Web-based systems already designed for cloud
Systems with variable usage patterns
Data requiring off-site backup

Less straightforward:

Legacy applications not designed for cloud
Systems requiring specialised hardware
Applications with strict latency requirements
Very large data sets with limited internet bandwidth

Assess Current State

Evaluate honestly:

Current system performance and reliability
Security posture and compliance status
Staff technical capabilities
Internet connectivity quality
Budget for migration and ongoing costs

Planning Phase

Choose Migration Strategy

Common approaches include:

Rehosting (lift and shift)Move existing systems to cloud infrastructure with minimal changes. Fast but may not optimise for cloud benefits.

ReplatformingMake some modifications to take advantage of cloud capabilities without complete redesign.

RefactoringRedesign applications specifically for cloud. Maximum benefit but highest effort and cost.

ReplacingSwap existing applications for cloud-native alternatives. Sometimes easier than migrating.

RetainingKeep some systems on-premises where migration doesn't make sense.

Most businesses use a mix of strategies depending on each system.

Select Cloud Providers

Major options include:

Microsoft Azure (integrates well with Microsoft environments)
Amazon Web Services (broadest service range)
Google Cloud Platform (strong data analytics)
Australian providers for specific requirements

Consider:

Data residency requirements (keeping data in Australia)
Integration with existing systems
Support and expertise availability locally
Pricing models and total cost of ownership

Plan the Sequence

Migration sequence matters:

Start with lower-risk systemsEmail and file storage are often good starting points—important but well-understood.

Consider dependenciesSystems that depend on each other may need to migrate together or in specific order.

Time it rightAvoid migration during busy periods. Plan for after-hours work where necessary.

Build in contingencyThings take longer than expected. Allow buffer time.

Implementation Phase

Prepare Your Environment

Before migration:

Configure cloud environment and security settings
Set up networking connections between cloud and on-premises
Establish monitoring and management tools
Document configurations for future reference

Migration Execution

During the actual migration:

Test before productionMigrate test versions first. Verify functionality before switching live systems.

Communicate with staffPeople need to know what's changing and when. Reduced support issues.

Have rollback plansIf migration fails, how do you return to the previous state?

Validate thoroughlyDon't assume success—test everything before declaring completion.

Post-Migration

After migration:

Monitor performanceCloud systems behave differently. Watch for unexpected issues.

Optimise costsCloud billing can surprise. Review usage and right-size resources.

Decommission old systemsDon't pay for cloud AND old infrastructure. Plan retirement.

Update documentationReflect new architecture in system documentation.

Common Migration Challenges

Underestimating Complexity

Dependencies and integrations are often more complex than expected. Discovery and planning phases reduce surprises.

Data Transfer Time

Large data volumes take time to upload, even with good internet. Plan data migration carefully, potentially starting early.

Performance Changes

Cloud performance differs from on-premises. Some applications may need adjustment.

Cost Surprises

Cloud pricing models are complex. Model expected costs carefully and monitor actual spending.

Security Gaps

Different security approaches are needed for cloud. Ensure security keeps pace with migration.

Getting Support

Cloud migration is a significant undertaking. Most businesses benefit from:

Expertise in cloud platforms and migration methodologies
Experience identifying and addressing common issues
Resources to execute migration alongside normal operations
Ongoing support as cloud environment matures

The investment in getting migration right typically pays for itself through avoided problems and faster realisation of cloud benefits.

Moving Forward

Cloud migration is not a single project but an ongoing journey. Start with clear objectives, plan carefully, execute methodically, and continuously optimise.

The cloud offers genuine advantages for most Australian businesses. Realising those advantages requires treating migration as a strategic initiative, not just a technical exercise.

Cloud Migration Planning: A Step-by-Step Approach for Australian Businesses