Make database readonly for specific time interval

[gamm...@gmail.com]

Dear Robbie,

is there a way to make the database readonly, such that only read operations are permitted? I need a kind of lock for readwrite operations for a specific period of time...

Thank you!

[Robbie Hanson]

I can think of a couple ways to do this.

1. You could simply start an async read-write transaction, and then (within the transaction block) sleep for a period of time.

2. Another option is set the databaseConnection.permittedTransactions property. You could simply set the value to YDB_AnyReadTransaction for a period of time. (You’ll need to do this for all your connections. Or, at least, those connections you want to prevent read-write transactions on.)

The difference between the 2 options is this:

#1 : any read-write transaction will simply be queued until your sleeping transaction completes.

#2 : any read-write transaction attempt will throw an exception during that time period.

-Robbie Hanson

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