40
Replication - DC4 (4)
USN
1217
DC3
USN
2053
DC2
USN
4712
DC1
USN 3388 ->
3389
DC4
DSA GUID
Highest Org. USN
DC1 GUID
4711
DC2 GUID
2053
u
Step 4: DC1 replicates new user to
DC4
l
Sends data, last-object-changed USN,
state data
l
DC4 uses this data to improve it’s up-
to-dateness
DSA GUID
Highest known USN
DC1 GUID
4712
DC3 GUID
1217
DC4 - Up-to-dateness vector
DC4 - High watermark vector
Data, 4712, vector