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A comment on Uber Migrates 1T Records from DynamoDB to LedgerStore to Save $6M Annually. Parent comment

Re:Uber Migrates 1T Records from DynamoDB to LedgerStore to ... by zaphirplane on Monday May 20, 2024 @07:39AM (#40414390)
> or with backups take a while to restore a PB and a way to take a hot backup without impacting the service that by itself is a task or snapshots which is more disk

> 1:1 replication Depending on the amount of writes could be a ton of extra disk and a bucket for network cost

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Re:Uber Migrates 1T Records from DynamoDB to LedgerStore to ... by bayindirh on Monday May 20, 2024 @07:50AM (#40414445)
These systems support zero-downtime snapshots. You tell it to snapshot, it instantly snapshots, you can run a differential/incremental backup at great speeds. Your RAID controller is already caching the hot data, so the impact is minimal.

Except network cost there's no extra disk required. It's just broadcasted writes consumed on the other hand.

These boxes are not dumb JBODS. They support their own replication/backup subsystems, so everything is transparent.

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