Notification of upcoming maintenance period - September 13, 2011

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App Engine Downtime Notify

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Aug 10, 2011, 12:42:17 PM8/10/11

to google-appengine...@googlegroups.com

Hey everyone,

(If your application uses High Replication datastore, you can ignore this email)

Just letting you all know that we're planning an upcoming scheduled maintenance period in September:

Tuesday, September 13, 5:30 PM - 6:30PM Pacific

For everyone that's not currently on high replication datastore, we're hoping to be able to ship a self-migration tool soon that will allow you to move your data and create an alias pointing your application ID to your new application ID - effectively preserving your existing app ID. I don't have an ETA for this other than "soon", unfortunately, so please make sure to check the groups and the App Engine blog from time to time.

Below is the standard information we usually send out with these notifications. Check it out for more information about read-only periods or how to be notified of production events.

- Ikai

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The datastore will be placed into read-only mode and memcache will be

flushed. It is recommended that critical portions of your application

that depend on the datastore should make use of the capabilities API

to detect and recover gracefully during read-only periods.

Documentation describing the capabilities API can be found here:

Python: http://code.google.com/appengine/docs/python/howto/maintenance.html

Java: http://code.google.com/appengine/docs/java/howto/maintenance.html

There will be no downtime for developers whose applications use High

Replication Datastore. You can read more about High Replication here:

http://googleappengine.blogspot.com/2011/01/announcing-high-replication-datastore.html