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dragonflydb / dragonfly-operator

A Kubernetes operator to install and manage Dragonfly instances.
https://www.dragonflydb.io/docs/managing-dragonfly/operator/installation
Apache License 2.0
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Is it production-ready? #130

Closed matrix-root closed 1 year ago

matrix-root commented 1 year ago

Good day dear everyone and thanks for such cool product! Going to use it in production, but have few questions regarding persistence

Am I right that snapshot-system is required to have complete robust production-ready setup? As I understand - question is yes. At least because it's only option to attach PVC to pods

And one more question - what schedule stands for? Am I right that persistence-sync will be executed one time per 5 mins (or other time based on cron-schedule) So, is it correct that between schedule-triggering I could lost data?

Anyway, thanks for awesome stuff one more time! 🙏

Pothulapati commented 1 year ago

Hey @matrix-root, Thanks for raising the issue and all the good words.

Am I right that snapshot-system is required to have complete robust production-ready setup?

It's not mandatory for caches but its advised. If you have want to have snapshots, The suggested option is PVC's but we also added support snapshotting into S3 directly (which is really good, and I can recommend it). But by default you can always just use the local host node storage for snapshots with the relevant PVC behind.

And one more question - what schedule stands for? Am I right that persistence-sync will be executed one time per 5 mins (or other time based on cron-schedule) So, is it correct that between schedule-triggering I could lost data?

Nope. With schedules you have a more granular control over when you want to backup but whenever a pod terminates irrespective of schedules, They always write into the specified path (S3 or PVC) and then shut down so there is no loss of data if they shutdown correctly but sudden terminations could cause the loss and in which case having a granular schedule helps.

Hope i answered your questions!