Realistic, Production-Grade War-Room Script During a High-risk Database Migration SAP ASE to SQL Server on Azure VM for a US Bank
War-Room Script combines:
* Who says what (roles & communication)
* Minute-by-minute execution timeline
* Decision points & fallback triggers
This is written so you can literally run a live migration call using this script.
---
# WAR ROOM SETUP (BEFORE CLOCK STARTS)
Roles in the Call
* Migration Lead Senior SQL DBA who runs the call
* Application Lead
* Infrastructure Lead
* Business Owner
* Observer / Auditor (optional for bank)
---
Opening Statement (T-15 minutes)
Migration Lead:
“We are starting the production migration of ASE to SQL Server on Azure VM. All teams confirm readiness. This is a controlled execution.Any issue will be raised immediately. No silent failures.”
---
Each Team member Responds:
* Application: “Application team ready. No active user sessions expected.”
* Infrastructure: “Infrastructure stable. Network and storage confirmed.”
* Business: “Business approval confirmed. Proceed.”
---
MINUTE-BY-MINUTE EXECUTION TIMELINE
---
T-0: GO-LIVE START
---
T+00 min — STOP APPLICATION TRAFFIC
Application Lead: “Stopping all application services now.”
*(Wait for confirmation)
---
Application Lead: “All application connections terminated. No active sessions.”
---
DBA VERIFY:
```sql
SELECT * FROM sys.dm_exec_sessions WHERE is_user_process = 1;
```
“Confirmed. No active sessions. Proceeding to database freeze.”
---
T+02 min — FREEZE SOURCE DATABASE (ASE)
---
DBA: “Switching ASE database to read-only mode.”
Command (ASE):
```sql
sp_dboption dbname, 'read only', true
go
```
“Source database is now read-only. No further changes allowed.”
---
T+05 min — FINAL INCREMENTAL DATA SYNC
---
DBA: “Starting final delta sync.”
---
Run Incremental Load on ASE
```sql
-- Example logic
SELECT * FROM Transactions
WHERE LastModified > @LastSyncTime
```
DBA say every few minutes: “Delta sync in progress… monitoring throughput.”
---
T+15 min — SYNC COMPLETION
---
DBA: “Final sync completed. Starting validation.”
---
T+16 min — DATA VALIDATION
---
Step 1 — Row Count on SQL Server
```sql
SELECT COUNT(*) FROM Transactions;
```
---
Step 2 — Checksum on SQL Server
```sql
SELECT CHECKSUM_AGG(BINARY_CHECKSUM(*)) FROM Transactions;
```
---
DBA say: “Row count and checksum match between ASE and SQL Server.”
---
If mismatch:
DBA say: “Data mismatch detected. Pausing cutover. Re-running sync.”
---
T+20 min — BUSINESS VALIDATION CHECK
---
Business Owner: “Critical tables verified. Data looks correct.”
---
DBA say: “Proceeding to application cutover.”
---
T+22 min — SWITCH CONNECTION STRING
---
Application Lead: “Updating connection string to SQL Server.”
---
Example:
```
Old: ASE_Server
New: SQLServerVM.database.windows.net
```
---
T+25 min — START APPLICATION
---
Application Lead: “Starting application services.”
---
T+27 min — INITIAL CONNECTION TEST
---
Application Lead: “Application connected successfully.”
---
**DBA:**
```sql
SELECT COUNT(*) FROM sys.dm_exec_sessions;
```
---
DBA say: “User sessions are connecting. Monitoring performance.”
---
T+30 min — LIVE TRANSACTION TEST
---
Business Owner: “Executing test transactions.”
---
Examples:
* Login
* Fund transfer
* Report generation
---
Business Owner: “Transactions successful.”
---
T+35 min — PERFORMANCE MONITORING
---
DBA:
```sql
SELECT wait_type, wait_time_ms
FROM sys.dm_os_wait_stats;
```
---
DBA say: “Monitoring CPU, IO, and query performance. No critical issues.”
---
FAILURE DECISION POINT (VERY IMPORTANT)
---
If ANY of these happen:
* Application cannot connect
* Data mismatch
* Severe performance issue
---
DBA say: “We are initiating rollback procedure. Returning to ASE system.”
---
ROLLBACK STEPS (IF NEEDED)
---
Immediate
* Stop application
* Re-enable ASE write mode
```sql
sp_dboption dbname, 'read only', false
```
---
Application Lead: “Switching back to ASE connection.”
---
DBA say: “Rollback completed. System restored to original state.”
---
T+45 min — STABILIZATION
---
If everything is OK:
---
DBA say: “System stable. Entering monitoring phase.”
---
T+60 min — ENABLE FULL OPERATIONS
---
Application Lead: “Opening system to users.”
---
Business Owner: “Users can now access system.”
---
T+75 min — HADR VALIDATION
---
DBA:
```sql
SELECT * FROM sys.dm_hadr_availability_replica_states;
```
---
DBA say: “Availability Group healthy. Replication working.”
---
T+90 min — BACKUP VALIDATION
---
```sql
BACKUP DATABASE BankingDB
TO DISK = 'D:\Backup\post_migration.bak';
```
---
DBA say: “Post-migration backup completed successfully.”
---
T+120 min — CLOSE WAR ROOM
---
Final Statements
---
DBA: “Migration completed successfully. System stable, validated, and backed up.”
---
Application Lead: “Application stable. No issues reported.”
---
Business Owner: “Business operations normal. Migration accepted.”
---
FINAL WAR ROOM CHECKLIST
---
Before closing:
* Application running
* Data validated
* Users connected
* No blocking
* Backup completed
* HADR healthy
---
PRO TIPS (FROM REAL MIGRATIONS)
---
1. Silence leads Danger
If someone is quiet, ask: “Please confirm status.”
---
2. Always Speak in Status Updates
Every 3–5 minutes say: “Current status: stable / syncing / validating”
---
3. Never Rush Validation
Most failures happen because teams skip validation.
---
4. Always Have Rollback Ready
Even if you don’t use it.
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