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timshannon / badgerhold

BadgerHold is an embeddable NoSQL store for querying Go types built on Badger
MIT License
515 stars 52 forks source link

migrations #44

Open joe-getcouragenow opened 3 years ago

joe-getcouragenow commented 3 years ago

v2 looks awesome.

Really like the DSL and aggregations.

One thing that is blocking is Migrations. Does anyone have any thoughts on a strategy for this ?

timshannon commented 3 years ago

You can just get every key from the old DB and put them into the new one. Everything badgerhold uses (indexes, type info, etc), is stored in the database.

IvanTurgenev commented 3 years ago

You can just get every key from the old DB and put them into the new one. Everything badgerhold uses (indexes, type info, etc), is stored in the database.

to create backups?

gedw99 commented 3 years ago

No to migrate the data from one Schema to another.

For small dbs it’s ok but for large ones it’s going to present time and disk space issues.

i guess you could also write a migration to change the shape of the dara within the same dB. Just iterate the type and replace it with a new structure. Would need to back it up first anyway I suspect in case the power fails half way through etc

timshannon commented 3 years ago

Changing the shape of the structure ( adding or removing fields) will entirely depend on the encoding type used and how that encoding type will handle the change.

On Sat, Mar 13, 2021 at 1:29 PM ged @.***> wrote:

No to migrate the data from one Schema to another.

For small dbs it’s ok but for large ones it’s going to present time and disk space issues.

i guess you could also write a migration to change the shape of the dara within the same dB. Just iterate the type and replace it with a new structure. Would need to back it up first anyway I suspect in case the power fails half way through etc

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