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Услуга · Custom software development

Migration of applications and databases

On a live system you get exactly one attempt to do everything right. That is why the bulk of the work goes into preparation: migration rehearsals, timing every step and a retreat route prepared in advance.

Send a request What is included
Rehearsal
before the live move
Window
calculated from measurements
Rollback
prepared in advance
Reconciliation
immediately after the cutover

What the work includes

The outcome is decided by preparation. The move itself lasts a few hours, while getting ready for it takes weeks.

Discuss the scope

Survey

What is moving, what it depends on, where the data lives, which exchanges will be affected.

Plan

A sequence of steps with duration estimates and points where the decision to continue is made.

Rehearsals

A full move onto a test environment with timings and a hunt for bottlenecks.

Transfer

With integrity checks and data conversion wherever the structures differ.

Retreat route

Actions described in advance in case a serious problem surfaces after the cutover.

Reconciliation

We count totals and row numbers and manually spot-check the most important items.

How it goes

Preparation takes two weeks and up; the move itself usually fits into a weekend.

01

Estimate

Data volume, dependencies, exchanges, the acceptable length of the outage.

02

Rehearsal

A full run on a copy against a stopwatch. The first rehearsal almost always uncovers surprises.

03

Migration

We do it inside the agreed window strictly to the rehearsed scenario, staying in touch from beginning to end.

04

Monitoring

For a week we watch how it behaves, and the old system stays available for reconciliation.

The old system must not be switched off straight after the move. Let it stay running for at least thirty days: something that did not travel across, or travelled in distorted form, almost always surfaces, and there will be nowhere to take it from once the system is dark.

Questions and answers

The exact figure comes from a rehearsal, because it measures the time on your real volume. In our experience databases of up to a few hundred gigabytes move in a matter of hours, and it is better done at a weekend.

For some systems yes, through continuous synchronisation followed by a cutover. That option is dearer and harder, and it is justified where downtime genuinely cannot be allowed. Most companies find a weekend window enough.

That is exactly why a copy is taken before the start and a reconciliation is done afterwards. Nobody touches the archive until confirmation comes from your side that everything works correctly. A point of return exists at every stage.

More in this area

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Service Full-cycle development From analysis through to supporting the finished product Service Mobile development Apps for iOS and Android Service Development on open source With no fee for each user of the system Service Dedicated development teams Engineers for your team for an agreed period

We will plan the move

Write what moves where and how much downtime is acceptable. We will start with a rehearsal on a copy.