Hi,
The maximum size of a blob is 2GB. If you are uploading the blob
from your app code, I believe the data will be sent in 1Mb chunks. If
you are reading from a blob in your app code, read the data in 1Mb
chunks. Clients can send up to 2GB if you use the
BlobstoreUploadHandler, and they can also download that data if you
use the BlobstoreDownloadHandler.
You can reference blobs from your Datastore entities:
http://code.google.com/appengine/docs/python/datastore/typesandpropertyclasses.html#BlobReferenceProperty
Google Storage for Developers is on the Roadmap:
http://code.google.com/appengine/docs/roadmap.html
A lot of quota information is in the general quota doc:
http://code.google.com/appengine/docs/quotas.html
Many of the service overview sections, such as the Datstore and
Blobstore, detail relevant quotas:
http://code.google.com/appengine/docs/python/datastore/overview.html#Quotas_and_Limits
http://code.google.com/appengine/docs/python/blobstore/overview.html#Quotas_and_Limits
Robert
On Fri, Apr 1, 2011 at 04:47, Movesax <move...@gmail.com> wrote:
> I'm reading numbers all over the place about blobstore and I don't really
> understand their implications. If anyone could help, it would be greatly
> appreciated.
> from: http://code.google.com/appengine/docs/python/blobstore/overview.html#Writing_Files_to_the_Blobstore
> it says that filesizes in the blobstore are limited to 2GB
> but it also says that the maximum amount that can be written with a single
> API call is 1mb.
> Does that mean that a 2GB file could be uploaded downloaded so long as it
> were chunked into 1mb pieces?
> Also, I saw that entry was linked from a fairly recent blog post - Is that
> the most 'up to date information on Blob limits?' I think I've also seen
> that 50mb is their limit.
> And what about attaching Blobs to other Data Structures? There's a limit on
> the size that data structures can be in the datastore... I'm not sure what
> that is currently, but I know that it used to be 1mb. Even if we can have
> large blobs, does this mean we can't have them attached to other data
> structures?
> Also, I saw someone linked to a new Google Storage API. Is this going to
> somehow be accessible to the GAE?
> Finally, these limitations should probably be mentioned somewhere in the
> overview or maybe quota sections. I had a terrible time finding the little
> information I found :(
> -thanks
>
> --
> You received this message because you are subscribed to the Google Groups
> "Google App Engine" group.
> To post to this group, send email to google-appengine@googlegroups.com.
> To unsubscribe from this group, send email to
> google-appengine+unsubscr...@googlegroups.com.
> 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 google-appengine@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine?hl=en.
