Every Document in SharePoint 2013 is now stored as multiple threaded BLOBS in the new Streams data table. WHENEVER a new VERSION of a document is created, a new Record is written in this data table that CONTAINS only the thread BLOBS of the original document that corresponds to the Change, merged with the new Changes.

In other words a new Blob with Changes is added as a new row in the table. Each BLOB that gets added Contains a numerical Id that represents the source BLOB.

At the end it is the job of BLOB Index to keep the track of Blobs and to create a full file with the Combination of entries that point to the unchanged shreds of the previous version(s) and the entries that point to the newly added Changed shreds.

Every Document in SharePoint 2013 is now stored as multiple threaded BLOBS in the new Streams data table. Whenever a new Version of a document is created, a new Record is written in this data table that contains only the thread BLOBS of the original document that corresponds to the Change, merged with the new Changes.

In other words a new Blob with Changes is added as a new row in the table. Each BLOB that gets added Contains a numerical Id that represents the source BLOB.

At the end it is the job of BLOB Index to keep the track of Blobs and to create a full file with the Combination of entries that point to the unchanged shreds of the previous version(s) and the entries that point to the newly added Changed shreds.