Update Migrating your existing Production DB.md

Removed/replaced outdated links to MariaDB docs, removed redundant and outdated sections, general cleanup and formatting

Author: jzhang-skysql

docs/Data loading, Migration/Migrating your existing Production DB.md

@@ -1,43 +1,23 @@
 # Migrating your existing Production DB
 
-Databases can be migrated to MariaDB SkySQL from many different database platforms, including Oracle, MySQL, PostgreSQL, Microsoft SQL Server, IBM DB2, and more
+Databases can be migrated to SkySQL from many different database platforms, including Oracle, MySQL, PostgreSQL, Microsoft SQL Server, IBM DB2, and more.
 
 # Lift-and-shift from a compatible version of MySQL/MariaDB to SkySQL
 
 To perform a lift-and-shift migration to SkySQL, use the following process:
 
-1. Identify requirements for your MariaDB SkySQL implementation including:
-    - [Topology](https://mariadb.com/docs/skysql-previous-release/features-and-concepts/services/)
-    - [Instance size](https://mariadb.com/docs/skysql-previous-release/features-and-concepts/selections/instance-sizes/)
+1. Identify requirements for your SkySQL implementation, including:
+    - Topology
+    - Instance size
     - Storage requirements
     - Desired server version
-2. [Deploy the desired configuration](https://mariadb.com/docs/skysql-previous-release/service-management/launch/) on MariaDB SkySQL
+2. Deploy the desired configuration on SkySQL
 
-<aside>
-💡 When migrating from a production DB a common practice is to setup live replication to the SkySQL database.  Here is the sequence of steps you should follow for a live cutover:
-
-</aside>
-
-1. On the source database (MySQL or MariaDB) obtain the Binlog file name and its current position. Essentially, we want to track all DB changes from a certain point in time. See [‘Replicating data’](Migrating%20your%20existing%20Production%20DB%208ba80cbdb9b14f81a1df5b096d549522/Replicating%20data%20from%20external%20DB%20cdf15e1cd8d24880858d6cd2f50d8fd2.md) page for the command. 
-2. Next, take a [dump of your source database using mysqldump or mariadb-dump](Import%20data%20from%20external%20DB%209d0a68120e404f36b9f09a5ad71796b7.md) 
-3. Import into your target SkySQL DB using this logical “dump” (SQL)
-4. Finally, turn ON the replication using the SkySQL ‘start_replication’ procedure as noted below. 
-
-# Assisted Migration to SkySQL MariaDB
-
-SkySQL customers can receive assistance from SkySQL Inc when migrating a database to SkySQL:
-
-- SkySQL Inc's [migration process](https://mariadb.com/docs/skysql-previous-release/migration/assisted/#Migration_Process) divides a migration into multiple well-defined stages with distinct validation criteria at each stage
-- SkyDBAs and SkySQL support can assist with many migration steps
-
-For assistance with a migration:
-
-- Existing customers can submit a [support case](https://mariadb.com/docs/skysql-previous-release/service-management/support/) to request assistance with a migration
-- New customers can [contact us](https://mariadb.com/docs/skysql-previous-release/contact/) to begin the migration planning process
+---
 
-## Migration Process
+# Assisted Migration to SkySQL
 
-We use a multi-step process to assist customers with migrations:
+Our [SkyDBA team](https://skysqlinc.github.io/skysql-docs/FractionalDBA/) can help design a migration plan to suit your needs. We use a multi-step process to assist customers with migrations:
 
 1. **Assessment** of application requirements, inventory, and identified challenges
 2. **Schema Migration** including tables, constraints, indexes, and views
@@ -46,27 +26,15 @@ We use a multi-step process to assist customers with migrations:
 5. **Quality Assurance** to assess data validity, data integrity, performance, accuracy of query results, stored code, and running code such as client applications, APIs, and batch jobs
 6. **Cutover** including final database preparation, fallback planning, switchover, and decommissioning of old databases
 
-For additional information, see "[Whitepaper: Migrate to MariaDB from Oracle](https://go.mariadb.com/GLBL-WC2020OracleMigration_LP-Registration.html)".
-
----
-
-# Migrate to MariaDB SkySQL using AWS DMS
-
-This blog article details how to [Migrate RDS MySQL to SkySQL MariaDB Using AWS Data Migration Service](https://go.mariadb.com/21Q3-WC-GLBL-DBaaS-Amazon-RDS-to-SkySQL-Migration-DB1109_LP-Registration.html)
+- Existing customers can submit a [support case](https://app.skysql.com/dashboard) to request assistance with a migration
+- New customers can [contact us](mailto:support@skysql.com) to begin the migration planning process
 
 ---
 
 # Replicating data from an External DB
-Click [here](Replicating%20data%20from%20external%20DB%20cdf15e1cd8d24880858d6cd2f50d8fd2.md) for a detailed walk through of the steps involved. 
-
-
-For assistance with a migration:
-
-- Existing customers can submit a [support case](https://mariadb.com/docs/skysql-previous-release/service-management/support/) to request assistance with a migration
-- New customers can [contact us](https://mariadb.com/docs/skysql-previous-release/contact/) to begin the migration planning process
-
-## Best Practices
+Click [here](Replicating%20data%20from%20external%20DB%20cdf15e1cd8d24880858d6cd2f50d8fd2.md) for a detailed walk through of the steps involved.
 
+---
 
 ### Live Replication for Minimal Downtime