The BLOB data type

BLOB columns work well for large documents that contain binary data, such as Microsoft™ Word or Acrobat PDF. A column of type BLOB can contain documents of unlimited size, since the data is stored in sbspaces.

There is, however, a significant amount of resource overhead when you store documents in sbspaces. If all your documents are smaller than 32 KB, you might consider storing them in a column of type LVARCHAR.