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Solution

Retire a legacy database on a deadline

A license renewal, an end-of-support date, or a data-center exit. The date is fixed and the system is load-bearing. This is the path that gets you off it on your terms — big bang or gradual — without betting the quarter on either.

Talk to an engineerAssessment and roadmap

If any of these are true, this is your situation

  • A license renews in under a year and the number went up
  • The engine is approaching end of support and nobody owns the upgrade
  • A data-center or cloud exit has a contractual date attached
  • The people who understood the schema have left
  • Every estimate you have been given is "somewhere between six months and never"

How we sequence it

  1. 01

    Establish what is actually there

    • Inventory of databases, data flows and real access patterns
    • Which consumers exist, and which are genuinely still used
    • The honest blockers, named early rather than discovered late
  2. 02

    Pick the target and plan the route

    • Options compared on cost, risk and fit, and TCO
    • Migration plan and cutover process
    • A recommendation you can act on with or without us
  3. 03

    Run the two systems in parallel

    • Continuous replication onto the target while the old one serves
    • Verify against production traffic before anything depends on it
    • The deadline stops being a cliff and becomes a switch you can time
  4. 04

    Cut over and decommission

    • Big bang on the date, or gradual — by service, or by tenant
    • A verified switch either way, with a back-out that is a reversal
    • The old system turned off on purpose, with evidence it is safe

Old and new, running together

The legacy system keeps serving while the target fills and stays in step. You verify against production traffic before anything depends on the new one — then cut over big bang, or gradually by service or by tenant in a multi-tenant estate.

Tooling

What does the moving

Dsync

Runs the parallel copy and keeps the target continuously in step with the legacy system, so you can cut over big bang or gradually and still back out.

Explore Dsync

Modernization assessment

Establishes what is actually there and which target stands up to the workload, before anyone commits to a date in public.

See the assessment

Proof

“The Adiom components, particularly dsync, worked extremely well for us and gave us all the peace of mind to confidently proceed with the cutover.”
VP Product and Data PlatformCatalina Marketing
100 TB
Moved off HBase in under 48 hours, with the source still serving
Parallel
Old and new run together for as long as the rollout takes
Reversible
A back-out that is a direction change

More on getting off a legacy system

Tell us the deadline

The earlier in the window we look, the more options exist. Even if the answer is that you have more time than you think, that is worth knowing.

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