Method 3: lshistory and chepoch method

To recover a lost packet, you can use the lshistory command to determine the epoch numbers when the packet was generated and then use a chepoch command to reset the sending replica's epoch table.

About this task

1. At the sending replica, use lshistory to determine the epoch numbers when the packet was generated:

   cleartool lshistory –long replica:sanfran_hub
   30-Jul.14:42:50     Susan Goechs (susan.user@minuteman)
     export sync from replica "boston_hub" to replica "sanfran_hub"
     “Exported synchronization information for replica "sanfran_hub".
     Row at export was: bangalore=950 boston_hub=1300 sanfran_hub=2000"
   23-Jul.17:36:46     Susan Goechs (susan.user@minuteman)
     export sync from replica "boston_hub" to replica "sanfran_hub"
     “Exported synchronization information for replica "sanfran_hub".
     Row at export was: bangalore=900 boston_hub=800 sanfran_hub=1500"
   ...
   

2. At the sending replica, use this output in a chepoch command:

   multitool chepoch sanfran_hub bangalore=950 boston_hub=1300 sanfran_hub=2000
   Change oplog IDs in row "sanfran_hub" [no] yes
   Epoch row successfully set.