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Editorial Team
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Asked: 2026-05-23T17:01:17+00:00

I store large Blobs in the datastore. These are XML files that can be

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I store large Blobs in the datastore. These are XML files that can be as large as 20mb. Storing a single 20mb XML file is fine, however the issue comes when I need to unserialize it.

There are all sorts of limitations to this:

  • I cannot read more than 1mb from Blobstore
  • even if I could I’m still confronted with the 5mb RAM limitation (since I need to put all the XML into RAM before unserializing it)

How would you say I can handle this? I’m open to all sorts of solutions, but hopefully not something that involves using another hosting provider.

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1 Answer

  1. Editorial Team

    You should switch to a Sax Parser, streaming the data from the Blobstore with the BlobstoreInputStream class.
    These libraries should help you to avoid the GAE RAM restriction.

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