DFS5055I RESTART LOG RECORD READ PASS n status; LSN=lsn
Explanation
The IMS emergency restart or normal restart log read is in progress or is completed. This message is issued when the IMS log is first read at IMS restart, then every 30 seconds after that to indicate progress, displaying the log sequence number of the log record just read. The IMS log contains log records with log sequence numbers that increase by 1 for each subsequent log record. The DFS5055I message is issued a final time when the log read process is complete.
- n
- The restart log read pass number, which can either be 1 or 2 for emergency restart, or 1 for
normal restart.
Normal restart reads through the IMS log only once, so this value is 1.
Emergency restart (except for /ERE COLDSYS) reads through the IMS log twice. Pass 1 processes the MODBLKS resource (DDIRs, PDIRs, RCTEs, and SMBs) checkpoint log records (type4004, type4006, type4007, type4083) to create the MODBLKS resource control blocks before applying log records to those resource control blocks. Pass 2 processes the remaining log records to return IMS to its state before IMS went down. Pass 2 starts over reading from the beginning of the log, so the log sequence number might be lower than the last log sequence number seen in pass 1. The type40 log records processed in pass 1 are skipped in pass 2.
- status
- The restart log read status.
IS IN PROGRESS means the restart log read process is in progress for PASS 1 or PASS 2.
HAS COMPLETED means that the restart log read process is completed for PASS 1 or PASS 2.
- lsn
- The log sequence number (LSN), which is a hexadecimal log sequence number that identifies an
individual log record. Each IMS log record contains its unique log sequence number at the end of the
log record. An underscore is printed to separate the two halves of the 8-byte LSN for readability
even though the LSN does not contain an underscore.
An example log sequence number is
00000000_00000171.The first DFS5055I message that is issued when IMS reads the log does not display a log sequence number of
00000000_00000001because logger and statistics log records that are not needed for restart come before the first type40 checkpoint log record on the IMS log. These include log records such as type42, type06, type43, type48, type27, and type45.
System action
IMS restart continues to read and process log records.Output destination
This message appears on the write-to-operator (WTO) terminal.
Operator response
If IMS restart is making progress, no action is required.If this message does not appear at regular 30-second intervals, IMS restart is not making progress. IMS restart might be hung. Take a dump of the IMS system and contact IBM® support.