Is there anyway we can use Google App Engine but do not use google's bigtable?
Like for storing my data, I would prefer to use cassandra and have the ability to plug and unplug additional database servers.
And say if I would like to use CouchDb/MongoDb instead is it supported in the GAE's infrastructure?
Short answer: No.
Longer answer: It depends how you want/need to use the database systems. There is no way you could run those system directly on AppEngine. But if low-latency was not a prerequisite (as would be the case with infrequent/periodical fetches of data) then you could set them up on another host with some kind of HTTP API, and query your services from appengine using urlfetch.
Just my two cents:
I dont think you can do what you want on Google App Engine directly. If you really need other databases, then Amazon's EC2 may e what you are looking for.
Also, Take a look at this: Using Quercus® to Run the WordPress PHP blog on Google App Engine
Yes, you can use Cassandra database on Google App Engine but in its flexible environment. But, as of now, flexible environment is in Beta version and is not recommended for production use.
Related
Is it possible to create AppEngine-independent applications with Python NDB API? I need to host some basic scripts with database on AE, but I don't want to vendor lockin into the service.
NDB was designed and built on App Engine. Turning it in to something portable would be a research project.
You could use no DB at all if you don't need to store data, or you can use Cloud SQL which is really a mysql like instance for your application. In any case, if you use AppScale you can move your App Engine application whereever you want, thus there is no vendor lock-in.
What is better to code with php in google app engine or in amazon-ec2.
I think it is better in amazon-ec2 because they support datastore with php and google app engine doesn't, what do you think ?
While its not possible to access the appengine datastore, google has a new preview service for "cloud datastore", google "cloud datastore from php" and you will see how to use it.
You really cant compare AWS with appengine as one requires managing servers and scalability manually and their noSQL solution (dynamoDB) is a joke compared to google's datastore, for example in dynamoDB you must provision your writes beforehand and even if you are all day changing provisioning, it takes sometimes hours to propagate the new setting.
I had never use Google App Engine, but several times AWS systems, and sure, as AWS EC2 could be used as Linux Server Instance, I recommend you that provider. And coz' it seems that you use PHP, they have strong API for this langage. Have fun with AWS.
We are currently running a combined AppEngine / GCE app and thus far have kept all of our datastore access on the AppEngine side of things. Now we are exploring also allowing our GCE instance to make some queries into the (shared) datastore. To start, I'm trying to figure out how to run things locally. What we have so far:
A Go devappserver running
A Go standalone binary that wants to issues queries to the devappserver datastore.
We installed ('go get') google-api-go-client/datastore/v1beta2 so that we can use an API instead of issuing direct HTTP calls. However we are definitely willing to issue direct HTTP calls if this API library won't work in development.
We have service accounts set up (we already access GCS from GCE) but I doubt that's relevant for running locally...
I've seen some docs but they (a) only talk about Python & Java, and (b) discuss connecting to the (standalone) development datastore server, as opposed to the datastore embedded in AppEngine's devappserver (if those are even different?). There is also the following answer here on StackOverflow, but again it discusses connecting to the standalone development datastore server:
How to connect to the local google cloud Datastore db?
Any pointers would be much appreciated!
Ian
Currently this is not possible in the development environment for several reasons. The Google Cloud Datastore tool (gcd.sh) uses the java development server. However when developing go for App Engine you use the python development server, which has different underlying storage. There is a bug to track this issue on the github page.
You can still develop a Google Cloud Datastore application in go however there are many bugs in the current go client library. Unfortunately, the development server does not currently support the JSON API, which the go library uses (see the note at the top of the page).
Update: I wanted to make sure proppy's comment was seen as part of the answer. His suggestion does provide a way to use the protocol version of the API, which is probably more stable than the go client library above. It could also let you use the gcd.sh tool to test this in the development server. You will have to craft the HTTP requests yourself though, and you won't be able to share the data in the datastore between your application and the Cloud Datastore in development. However it is definitely a good workaround and lets you use the Cloud Datastore API, which as it develops will be easier to work with than other workarounds.
From proppy:
Note that you can still use Cloud Datastore Protobuf HTTP API with Go. The protobuf definition is available on GitHub, you can compile it to Go code using the Go protobuf compiler plugin and then send POST HTTP requests to /datastore/{version}/datasets/{datasetId}/{method}.
If the use case from your "GO" app server is straight forward enough, you may want to implement access by using an API call to your GAE service (perhaps extending the service to receive the API calls).
This has the added benefit of only having to make changes in one place if your datastore definitions or functions change.
I'm thinking of building a dynamic web site using Google web engine Technology, however I would like to use it in a local network without internet . Can I use the Google web engine SDK as a LOCAL SERVER.In other words, is the SDK just for development and testing purposes or it can be used as a server?
Should I worry about long-term use of SDK as a local web server, is there any scalability issues I should be aware of.
Thank you.
You probably could, but there'd be no point.
GAE makes all sorts of tradeoffs which only make sense in terms of the benefits you get by running on Google's infrastructure: for example, the limited querying you can do with the datastore, or the strict timeout on requests.
Plus, the development server is extremely limited in what it can serve, so you'd need to put a proper web server in front of it anyway.
If you're using Python, you can use webapp2 as a standalone WSGI application, although you might be better off going directly for something like Django. I don't know much about serving Java apps directly but I guess you can use Tomcat.
I'm trying to deploy one of my java apps in GAE and I have used MongoDB. Unfortunately GAE doesn't allow me to create databases, however it suggests using Google Datastore. Are there any plugins or add-ons to use MongoDB.
You can't run MongoDB on GAE. You need to use the Google datastore.
Matt is right. If you want to deploy to Google's servers you can't use Mongo. If you are interesting in running your own server(s), check out AppScale.
If you really want to use MongoDB anyway, you'll have to find a third-party host that provides a REST interface through which you can make your transactions. I've personally tried and recommend MongoLab on App Engine. Then, in your code, use an HttpUrlConnection object to send/receive requests if you're doing it with Java.
I think you could deploy your app on app engine and create a separate vm instance in google compute engine that would have mongo installed, then you plug your GAE app on that vm for the db connection. This would allow you to keep all your app in the google cloud. See https://cloud.google.com/solutions/mongodb/ and http://docs.mongodb.org/ecosystem/platforms/google-compute-engine/
A lot of things have changed since this question has been asked, as of June 2021, you can use MongoDB Atlas with Google App Engine Standard running on Java 8 environment. I built my App with the Ktor framework that runs on App Engine and interacts with databases on MongoDB Atlas.
if you're still looking for an answer to this you might want to check this project that did exactly the same but in reverse, it will surely help you out with what you want to do.
http://code.google.com/appengine/articles/django-nonrel.html
you can use mongo, only if have something like on mongolab then use pymongo to connect and most important thing you need to enable socket api from gae dashboard.
it worked for me thanks