App Engine refugee

[n8gray]

Hi,

With my App Engine bill going up by a factor of 20x I'm looking for
alternatives. TyphoonAE looks like an interesting approach and I'd
like to experiment with it a bit. Perhaps you could answer a few
questions for me?

Would you advise using the last stable release from last December or
pulling from hg?

My app is a pretty low-resource app, typically consuming about 10 CPU
hours with a peak of 2 requests per second or so. Almost all the CPU
time is spent waiting for the datastore. Do you have a feel for what
kind of server that would require? I currently have a Linode 512 VPS
(512MB RAM, unspecified CPU) from linode.com and I'm wondering if I'll
need to plan to upgrade. Does the GAE approach work OK on a single
server?

My app requires transactions, so it sounds like I can't use the
MongoDB backend, but between the other two which would you recommend?

Thanks a lot!
-Nathan

[Tobias]

Hi Nathan,

Thanks a lot for looking at TyphoonAE! Building the development version from hg should work. It already uses the GAE SDK 1.5.3 release and has many other improvements. Please see http://code.google.com/p/typhoonae/source/browse/CHANGES.txt for further details.

This sample app http://blog.typhoonae.org/ runs on a single virtual XEN guest and serves 250 (concurrent) reqs/s minimum. By modifying the supervisor configuration you can easily add more appservers. It is also possible to run multiple apps or different versions of one app.

As you mentioned before, the Datastore MongoDB Stub lacks support for GAE transactions. Therefore, you can try the MySQL Datastore backend. It is mostly designed after the original SQLite Stub from the SDK. Unfortunately, it's performance gets worse when you have 10000+ entities of one kind.

Please let me know if you face any issues during installation.

Cheers,

Tobias

[Mauro Asprea]

Great to see that TyphoonAE is using 1.5.3 :D I am also considering to move my way into a VPS, using TyphoonAE. I already downloaded the VM and everything seems to work ok in my app. The only thing that I couldn't easily find is how to configure RabbitMQ for the Task Api to work. 

Congrats for the great work! I really can't believe when I saw everything working even the Channel API.

Thank you very much for your work!

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[Tobias]

Hi,

Thanks for trying TyphoonAE! I'm happy to hear that your app seems to run so far. The Task Queue service should automatically be configured when your appdir contains a queue.yaml file with at least the following contents:

queue:

- name: default

  rate: 5/s

This behavior differs from the original GAE and is already corrected in the development version of TyphoonAE. Sorry for the inconvenience. Please drop a line if you find more issues.

Cheers,

Tobias

[Nathan Gray]

Hi Tobias,

Thanks for the help. I managed to build everything using the buildout
script, but when I try to configure the demo this is what I get:

% ./bin/apptool parts/demo
/Users/n8gray/src/typhoonae/typhoonae/eggs/celery-2.1.1-py2.6.egg/celery/loaders/default.py:53:
NotConfigured: No celeryconfig.py module found! Please make sure it
exists and is available to Python.
NotConfigured)

I can see celeryconfig.py in ./etc but I'm not sure how to get that
visible to python.

Thanks,
-Nathan

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[Nathan Gray]

Huh, I just tried it a second time and it worked. Never mind! Now to
figure out how to run my own app...

Thanks,
-Nathan