Bug #7853

Updated by Tom Clegg over 6 years ago

h2. Background 

 Currently, Data Manager assumes that if two keepstore nodes report the same block B in their indexes, there are two copies of block B stored on two distinct volumes on two distinct nodes. This is not true in the recommended blob storage configuration: multiple keepstore services use a single blob storage volume. 

 For example, in a blob storage configuration with 8 keepstore nodes sharing a single volume, Data Manager will see 8 copies and consider all blocks to be overreplicated.