Notification of upcoming maintenance period - Wednesday, November 30, 2011

[App Engine Downtime Notify]

Hey everyone, 

(If your application is already using High Replication datastore, you can ignore this email. To tell if a currently deployed application is using High Replication, go to your application's admin console and look at the dropdown menu in the top left hand corner of the page. If the selected application shows "YOUR_APP_ID [High Replication]" (where YOUR_APP_ID = your application ID), you are already running on High Replication and can ignore this message.)

We're planning an upcoming scheduled maintenance period in September: 

Wednesday, November 30th, 5:30 PM - 6:30PM Pacific 

For everyone that's not currently on high replication datastore, we'll be releasing a self-service migration tool very soon. This self service migration tool minimizes the amount of read-only downtime and creates an alias pointing the current master/slave application ID to the new, high replication application ID, effectively allowing developers to preserve the app ID. Please sign up for early access here:

https://docs.google.com/a/google.com/spreadsheet/viewform?authkey=CLXR0LMN&formkey=dERMcDZuMnlycHoyZDd4Vy1PNXlhWlE6MQ#gid=0

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 

Developers can subscribe to the scheduled maintenance calendar using 

the following link: 

https://www.google.com/calendar/b/0/embed?src=4chlpo92ci2f54c2u21shbjk9o@group.calendar.google.com&ctz=America/Los_Angeles&gsessionid=OK

[App Engine Downtime Notify]

Sorry for the second email. If it isn't clear, this is taking place in November, not September (September is a typo).

[Johan Euphrosine]

Hi everyone,

Note this is still happening today: Wednesday, November 30th, 5:30 PM - 6:30PM Pacific 

Sorry for the short notice.

On Fri, Aug 19, 2011 at 8:54 PM, App Engine Downtime Notify <appengine.n...@google.com> wrote:

Sorry for the second email. If it isn't clear, this is taking place in November, not September (September is a typo).

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Johan Euphrosine (proppy)
Developer Programs Engineer
Google Developer Relations

[App Engine Downtime Notify]

Hi everyone,

A quick update: today's scheduled maintenance will NOT be happening. It has been delayed. I will be announcing the new date and time when it is finalized.

As a reminder, during maintenance periods, if your application is running using High Replication Datastore, you should not experience a service disruption. If you are running on Master/Slave datastore, you will experience approximately an hour of datastore read-only period, and Memcache will be flushed.

- Ikai

[App Engine Downtime Notify]

Today's scheduled maintenance has been POSTPONED to Tuesday, December 6th at 5:30pm-6:30pm Pacific Time. I'll post a separate thread with more details.

Thanks for your patience,

- Ikai