Migration Timeline Question

[Lawrence]

Hello,

We are preparing to migrate from Jira Data Center to Jira Government Cloud and are looking for timeline estimates from others who have completed migrations of a similar size.

Environment details:
Jira Data Center Version 9.12.31 (Soon to be on 10.3.19)
1-node Jira Data Center deployment
~400 projects
~410,000 issues
~1,300 users
~700 custom fields
12 installed apps total; 4 apps will be migrated (Email This Issue, BigPicture, Jira Workflow Toolbox, EazyBI)

Identity and access:
SCIM provisioning will be used
SSO is already fully configured

Environments:
3 Jira environments (1 production, 2 non-production)
Both non-production environments contain non-production data

Additional context:
Only 4 apps will migrate; the remaining apps will not be brought to Cloud.
---> We are seeking general expectations on how long migrations of this scale have taken (for example: 3 months, 6 months, 9 months, etc.)

We would appreciate any examples, guidance, or ranges based on past migrations of a comparable size, including time needed for planning, test runs, validation, and final cutover.

Thank you

[Aaron Pavez _ServiceRocket_]

Hi @Lawrence 

The timeline on how many months it'll take is tricky. You have:

1. Customer timeline (Jira DC licenses, app licenses,  other business priorities that impact how soon you need to move to cloud)

2. downtime to test migration ( you only have one node, which limits when you can migrate and test)

Roughly, it can be 3 to 6 months. leave plenty of time for UAT1, UAT2, test, test and tes. I can't stress this enough. test!

---

For this, you are missing what it takes the most, the attachments. 1 TB can take 15-20 hours.

~400 projects
~410,000 issues
~1,300 users
~700 custom fields

The data could take 3-5 hours.

There is a lot of docs that will help you test the migration (there is a lot to fix before testing)

https://support.atlassian.com/migration/docs/what-gets-migrated-with-the-jira-cloud-migration-assistant/

https://support.atlassian.com/migration/docs/run-pre-migration-checks-review-and-run-a-jira-migration/

https://support.atlassian.com/organization-administration/docs/ip-addresses-and-domains-for-atlassian-cloud-products/

https://confluence.atlassian.com/adminjiraserver/increasing-jira-application-memory-938847654.html

---

And now APPS!!

Understand and read how to migrate each app to cloud(some of them have an easy path using JCMA, others not su much)

https://docs.meta-inf.hu/email-this-issue/server-to-cloud-migration/server-to-cloud-automatic-migration-tool?_gl=1*l04n6n*_ga*MzQ1NzA0MS4xNzczOTIxNzgw*_ga_RQ2XS1ZP6N*czE3Nzc0Nzc0MjIkbzEkZzEkdDE3Nzc0Nzc0MjckajU4JGwwJGgw

https://appfire.atlassian.net/wiki/spaces/DLP/pages/297896980/Migration+using+Jira+Cloud+Migration+Assistant+JCMA

https://apps.decadis.net/spaces/JWTCLOUD/pages/62882489/Migrate+JWT+DC+to+JWT+Cloud

https://docs.eazybi.com/eazybi/set-up-and-administer/atlassian-data-center/database-migration#Databasemigration-ServertoCloud

1. Open a ticket with each vendor. They can guide you and will happily do so.

Good luck!