You can run the first step that won't do the full migration. The way the tool works is like this:
1. Copy all your data without putting the source app into read-only mode so you can continue serving 2. Ask you if you want to put the app into read-only mode (just don't do this) 3. Copy the delta (changed data) to the destination app 4. Ask you if you want to alias the app ID to the new application. When you say yes, you'll be serving from your new, shiny HRD application. The migration tool only does reads against your source datastore. It does not use quota or impact serving. It's marked "experimental" because there are a few cases where the migration will get stuck and require our manual intervention to unfreeze the migration, but from what we've seen, this only happens during step 1. It's never occurred yet on the critical, read-only period delta migration. You should also be able to run the delta migration as many times as you need, so it never hurts to start this process. Short answer: there's no impact on your serving app. The worst thing that might happen is you get charged for data storage on the destination app, which, if you are planning on using the datastore admin anyway, is something you were already planning on doing. -- Ikai Lan Developer Programs Engineer, Google App Engine plus.ikailan.com | twitter.com/ikai On Thu, Dec 22, 2011 at 10:44 AM, Dennis Fogg <[email protected] > wrote: > Since the migration tool is still experimental, I want to try making > copies of my data before migrating. > Thus, I need to enable the datastore admin. > > > > On Fri, Dec 23, 2011 at 2:35 AM, Ikai Lan (Google) <[email protected]>wrote: > >> Don't use that tool. Use the migration tool that's available when you >> click "Application Settings" and "View Migration Tool" on that page. >> >> -- >> Ikai Lan >> Developer Programs Engineer, Google App Engine >> plus.ikailan.com | twitter.com/ikai >> >> >> >> On Wed, Dec 21, 2011 at 8:54 PM, Dennis <[email protected]> wrote: >> >>> I'm looking into converting to HRD. >>> But as part of the process to explore that option, >>> I've problems with the datastore admin page: >>> >>> >>> http://groups.google.com/group/google-appengine/browse_frm/thread/640d7f7392e22f22# >>> >>> >>> >>> On Dec 22, 3:44 am, "Ikai Lan (Google)" <[email protected]> wrote: >>> > Do you guys have any application IDs of High Replication applications >>> that >>> > are experiencing datastore timeouts? What are you doing with these >>> calls? >>> > Could these be contention related? >>> > >>> > -- >>> > Ikai Lan >>> > Developer Programs Engineer, Google App Engine >>> > plus.ikailan.com | twitter.com/ikai >>> > >>> > On Wed, Dec 21, 2011 at 11:31 AM, blackpawn <[email protected] >>> >wrote: >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> > > Currently seeing this DeadlineExceededError bad weather again on app >>> > > id sketch-club if it's of any use to you Googlers for diagnosing this >>> > > problem. >>> > >>> > > -- >>> > > You received this message because you are subscribed to the Google >>> Groups >>> > > "Google App Engine" group. >>> > > To post to this group, send email to >>> [email protected]. >>> > > To unsubscribe from this group, send email to >>> > > [email protected]. >>> > > For more options, visit this group at >>> > >http://groups.google.com/group/google-appengine?hl=en. >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Google App Engine" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/google-appengine?hl=en. >>> >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google App Engine" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/google-appengine?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
