My database is not on RAC, though we use data guard and linux cluster (heratbeat). The blobs are not updateable.
I am currently testing on the perfomance on reading/writing blob to database vs filesystem. To my suprise I found out to read about 6kb size of blob from database takes 200 ms, where as on file system it takes 550 ms - over 2.5 times more. I was expecting it to other wise. For writing database as well filesystem is taking 60 ms. Again I was expecting read to be faster than write.
Sandeep -- //www.freelists.org/webpage/oracle-l