> Another problem is that databases aren't always great at indexing into the middle of blobs and changing them. Sometimes db engines want to copy values if you

> Another problem is that databases aren't always great at indexing into the middle of blobs and changing them. Sometimes db engines want to copy values if you change them, because they're optimised for lots of tiny values (row column values) and not small numbers of huge values. But apps often want to write into the middle of files or append to them. Then again, there's no such thing as overwrite on flash storage (just write-once or erase larger chunk), so maybe the next generation of storage for large objects as extents that are write-once is the way forward. Plenty of filesystems have already switched to this model.