Recovery

The Recovery Screen displays the configuration and status of the recovery file.
This Screen displays the following statistics:

   Filename    -> name of the recovery file
   Environment -> environment variable that identifies the file's location
   Type        -> UNIX, NT or NATIVE
   Size        -> size of the recovery file in blocks
   Last Wrap   -> last time the (circular) recovery file wrapped
   Timeouts    -> number of times Sun MTP flushes the file due to a timeout
   % Used      -> amount of the file used to store recovery information

If recovery is active for a Sun MTP system, the Recovery Screen displays recovery
attributes as specified in the Sun MTP VSAM Configuration Table (VCT). If 
recovery is not turned on in the VCT, the Recovery Screen displays 'Not Active' 
for the "Filename" datapoint and the rest of the datapoints are left blank. If, 
however, recovery is turned off because the minimum required size for the 
recovery file has not been met, the "Size" datapoint says 'Not Enough'. The 
minimum required size for a recovery file is 100 blocks. If there is not enough,
set the size to at least 100 blocks in the VCT and bounce the Sun MTP system. 
Recovery will become active.

One of the most important datapoints to monitor is the "Last Wrap" time. This 
datapoint displays the last time the recovery file became full, usually causing 
transactions to abort and the database file to rollback. If this condition 
persists, the administrator should analyze the transactions that are causing 
this condition. They may not be properly accessing the database or syncpointing.
In many cases, batch programs can cause the recovery file to wrap due to sync-
pointing the database at inappropriate intervals. Another reason for recovery 
file wrap may be that the recovery file is too small. Increase the size and 
determine if "Last Wrap" is similar to when the file was smaller.
