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I found out that in Amazon Simple DB, an attribute can have a maximum size of 1024 bytes. So I am thinking to move to Google App Engine and use Google Big Table.
Is there any such restriction on Google Big Table as well?
I am trying to make a blogging platform on Google Big Table where the StringFields will be more than 1024 bytes.
An entity in App Engine can be up to 1MB once encoded into the wire-format. Individual properties have no specific limit, but indexed properties must be 512 bytes or shorter. Since you don’t want to index the body of a blog post as a single entry anyway, this won’t be a problem for blog entries.
You might want to check out my series on writing a blogging system on App Engine.
Tangentially, note that the App Engine datastore is not raw Bigtable; it’s a layer built on top of Bigtable, which provides a lot of extra capabilities.