Looks like you are using the default MongoBlobStore. Based on that

> 1) Based on what size data goes in blob collection

For MongoBlobStore that is determined via
org.apache.jackrabbit.oak.spi.blob.AbstractBlobStore#blockSizeMin
which defaults to 4096

> 2) Is there any reference between Nodes and blob collection

The BlobId created for Binaries referred in Node property are stored
in Node Document. Those blobId are for the document in Blob collection

> 3) Is there a flow diagram from where I can find how exactly a content is
getting loaded from Mongo to UI

Which UI? These are mostly internal implementation details and you
would have to refer to code for that.

btw whats the higher level objective here. That might help us to clarify better
Chetan Mehrotra


On Wed, Jun 25, 2014 at 10:33 PM, Abhijit Mazumder
<abhijit.mazum...@gmail.com> wrote:
> Hi,
>   This is my first mail to Oak mailing list. I tried to search markmail and
> existing documentation to understand the interaction between blob and nodes
> collection, but  I am not able to find any reference to understand
> 1) Based on what size data goes in blob collection
> 2) Is there any reference between Nodes and blob collection
> 3) Is there a flow diagram from where I can find how exactly a content is
> getting loaded from Mongo to UI
>
> If somebody can point me to relevant classes or any other reference that
> would be great
>
> Regards,
> Abhijit

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