A week-long mailbox migration of 5.5 TB nearly broke the mailboxes 4 times

Opus 5.5 built an imapsync wrapper used for a week-long migration of 5.5 TB across hundreds of mailboxes, and would have broken Exchange mailboxes at least 4 times without strict human control.

This only partly worked. Read what happened before you try it.

How it works

Opus builds a sync wrapper
Used for a week-long migration of 5.5 TB across hundreds of mailboxes
The setup would have broken the receiving mailboxes at least 4 times without catches

Why it’s worth knowing

At least 4 times is the count of disasters that did not happen.

Where it’s from

Summarized from a public post on news.ycombinator.com. See the original ↗

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