datablogs: Amazon RDS
Showing posts with label Amazon RDS. Show all posts
Showing posts with label Amazon RDS. Show all posts

Monday, April 8, 2024

Tuesday, November 14, 2023

PostgreSQL Table Partition on AWS RDS

If we grow bigger in the business , seamlessly our customer and transaction data also increases . In the meantime performance needs to consider as well 

So in this case of bigger tables indexes will not help us to achieve good performance on peak times . Alternatively we have partitioning to split the tables data into multiple pieces on all the relational database environments 

Like wise we are going to do range partition on sample table in PostgreSQL Database , In PostgreSQL three types of partition methods are available , 

Below are the important concern in the PostgreSQL Partition ,

  • Possible to attach regular table into partitioned one 
  • Not Possible to transform regular table to partitioned one   

So based on the above formula , we have tried to transform regular table into partitioned one for your reference 

Any one can use this example and perform partitioning in AWS PostgreSQL RDS easily 

Click GitHub Link for Code : AWS-PostgreSQL-RDS-Table-Partition

Step 1 : Create base datablogspaycheck table and insert some sample records 


DROP SEQUENCE IF EXISTS public.paycheck_id_seq;

CREATE SEQUENCE public.paycheck_id_seq





    CACHE 1;

create table datablogspaycheck


    payment_id int NOT NULL DEFAULT nextval('public.paycheck_id_seq'::regclass), 

    created timestamptz NOT NULL,

    updated  timestamptz NOT NULL DEFAULT now(),

    amount float,

    status varchar DEFAULT 'new'


CREATE INDEX idx_paycheck ON datablogspaycheck (created);

INSERT INTO datablogspaycheck (created) VALUES (

generate_series(timestamp '2023-01-01'

               , now()

               , interval  '5 minutes') ); 

Step 2 : Rename base table with new name

ALTER TABLE datablogspaycheck RENAME TO datablogspaycheck_basetable;

Step 3 : Create Partitioned table 

create table datablogspaycheck


    payment_id int NOT NULL DEFAULT nextval('public.paycheck_id_seq'::regclass), 

    created timestamptz NOT NULL,

    updated  timestamptz NOT NULL DEFAULT now(),

    amount float,

    status varchar DEFAULT 'new'


Step 4 : Create Separate Partition for each create date 

CREATE TABLE datablogspaycheck_202303 PARTITION OF datablogspaycheck

    FOR VALUES FROM ('2023-01-01') TO ('2023-03-01');


CREATE TABLE datablogspaycheck_20230304 PARTITION OF datablogspaycheck

    FOR VALUES FROM ('2023-03-01') TO ('2023-04-01');


CREATE TABLE datablogspaycheck_202304 PARTITION OF datablogspaycheck

    FOR VALUES FROM ('2023-04-01') TO ('2023-05-01');


CREATE TABLE datablogspaycheck_202311 PARTITION OF datablogspaycheck

    FOR VALUES FROM ('2023-05-01') TO ('2023-11-01');


CREATE TABLE datablogspaycheck_2024 PARTITION OF datablogspaycheck

    FOR VALUES FROM ('2023-11-01') TO ('2024-01-01');

Step 5 : Migrate the all records

insert into datablogspaycheck (payment_id,created,updated,amount,status) select payment_id,created,updated,amount,status from datablogspaycheck_basetable;

Step 6 : Validate each partition 

select * from datablogspaycheck_202303 order by 2 desc

select * from datablogspaycheck_20230304 order by 2 desc

select * from datablogspaycheck_202311 order by 2 desc

Its done , Easily migrated normal table data into partitioned table 

Thanks for Reading !!!

Sunday, June 25, 2023

Deep dive into Babelfish Compass

        Wow !!! If suppose on the migration projects we need to more stuffs and things to convert when coming to procedures , functions and other database objects 

But AWS is providing good things to migrate with easy steps , Ha Ha ... Don't overthink still you need to do 40% code migration works 

In this part Babelfish Compass is giving various options to support migration the codes from SQL Server to PostgreSQL with bebelfish feature enabled PaaS servers 

Below are easy steps on the Script Conversations

  • Install a 64-bit Java Runtime Environment (JRE) version 8 or higher

1.Download Compass Tool in Below

Needs to download .zip file to work with Babelfish Compatibility 

2.Unzip and Place the files in separate folder 

3.Be Ready with you SQL Database Generated Scripts file and Copy it in Same Folder 

Database name has been highlighted in below , 

4.Next , we can start running report with Babelfish Compass 

C:\Users\Admin\Downloads\BabelfishCompass_v.2023-03-a\BabelfishCompass>BabelfishCompass.bat reportfinal datablogsdbprod.sql

5.Finally Reports are generated in Documents Directory 

6.We can review the reports in any format , for me its easy with in HTML browser 

Just double click the HTML document , So like below we will get supported and unsupported features details in depth . 

We can directly go and debug the code . Also bebelfish compass is having plenty of methods to rewrite the code , we will check it in next blog 

Happy Coding !!!

Wednesday, June 21, 2023

Oracle RDS Audit log enable

Oracle Audit Log : 

Oracle Audit Log refers to the feature in Oracle Database that records and stores information about various database activities and events. It provides a mechanism to track and monitor user activities, system events, and changes made to the database.

  1. User Logins: Recording user login attempts and authentication information.
  2. Database Activities: Logging SQL statements executed by users, including select, insert, update, and delete operations.
  3. Privilege Usage: Monitoring the usage of privileges, such as granting or revoking permissions.
  4. Schema Changes: Tracking modifications to database objects, such as creating or altering tables, views, or indexes.
  5. System Events: Recording system-level events, such as startup and shutdown of the database.
  6. Security Violations: Detecting unauthorized access attempts or suspicious activities.
  7. Administrative Operations: Logging administrative tasks performed by database administrators, such as user management or database configuration changes.

The Oracle Audit Log provides an essential tool for security, compliance, and troubleshooting purposes.

Types of Auditing in Amazon RDS for Oracle : 

  1. Standard Auditing 
  2. Unified Auditing 
  3. Fine-grained Auditing

We are going to see , how do we enable Standard auditing in Oracle RDS 

How to enable Audit Log in Oracle RDS?

Make sure you have enabled custom parameter group for Oracle RDS 

  • Modify below values for Audit_Trail Parameter 

            Audit_Trail - DB, EXTENDED

  • Next ,Just needs to modify below DDL or DML statements to capture the logs from the server 





            AUDIT READ ON DIRECTORY datapump_dir;

Its all done , we have enabled required logs to capture for security purpose 

How to we monitor Audit Logs ? 

We can just run the below command get the captured audit logs in Oracle RDS ,

SELECT * FROM DBA_AUDIT_TRAIL order by 1 desc 

Its just for normal scenario , explained the process . Still we can separate Audit Table space and many further things are available in Oracle . Let see on another blogs 

Happy Auditing !!!

Monday, January 30, 2023

Update Backup and Restore in Same SQL Server RDS

Update of Previous post ,

As mentioned in below blog , past years we cant restore database into same SQL Server RDS

But now you can able to restore without any issues from recent releases of SQL Server RDS 

Thursday, December 15, 2022

Tuesday, December 6, 2022

Migrate and Sync RDS PostgreSQL to Amazon Redshift Serverless using AWS Glue

Always customer prefers cost less solutions to run the business . To help them their business and the requirements we also needs to provide efficient solutions 

Some cases cloud vendors provides good solutions for analytics load but cost will be very high , most of the time we don't want to recommend that but we need to do  

Like that one of the solution in AWS , its cost much but works much faster like anything 

We are talking about Amazon Redshift Solutions only , So recently they have launched Amazon Redshift Serverless solutions for few regions .

Whatever new comes , before customer catches the features we need to find and deliver the best approach to them . So ,

What is Amazon Redshift Serverless ? 

Amazon Redshift Serverless automatically provisions data warehouse capacity and intelligently scales the underlying resources. Amazon Redshift Serverless adjusts capacity in seconds to deliver consistently high performance and simplified operations for even the most demanding and volatile workloads.

With Amazon Redshift Serverless, you can benefit from the following features:

  • Access and analyze data without the need to set up, tune, and manage Amazon Redshift provisioned clusters
  • Use the superior Amazon Redshift SQL capabilities, industry-leading performance, and data-lake integration to seamlessly query across a data warehouse, a data lake, and operational data sources
  • Deliver consistently high performance and simplified operations for the most demanding and volatile workloads with intelligent and automatic scaling
  • Use workgroups and namespaces to organize compute resources and data with granular cost controls
  • Pay only when the data warehouse is in use

So , Overall no need of human interventions in the Redshift Serverless 

Everything is Fine , How to we migrate and sync Amazon RDS / EC2 Postgres / Aurora Postgres to utilize this Redshift Serverless 

What are the options available to migrate and Sync ?

  • DMS - Still Redshift Target is not available to migrate the Data
  • Export/Import - Yes we can perform , how to handle zero downtime migration . Syncing real-time data is not possible 
  • AWS Glue - Its Good Option , We can migrate and Sync real-time data from RDS to Redshift Serverless  
Lets start sample data migrate and sync into Amazon Redshift Serverless ,

Environment Setup Go Through ,

  1. RDS PostgreSQL
  2. AWS Glue
  3. Amazon Redshift Serverless 
  4. VPC S3 Endpoint
  5. IAM Role

RDS PostgreSQL : 

Amazon Redshift Serverless :

VPC S3 Endpoint :

IAM Role : 

Once Environment is completed , we can start adding connections and jobs in AWS Glue

How to add connections in AWS Glue , 

In AWS Glue Console --> Click Connections --> Create Connections 

Create source and target databases ,

For testing sample schema and data inserted into RDS PostgreSQL before creating the crawler 

Lets start to create separate crawlers for Source and Target to update catalog ,

Below data source is mapped to RDS PostgreSQL 

Also required policies updated role needs to attached ,

Choose appropriate databases for crawler , below is the for source 

Below is the for Target , 

Once its completed , we have already deployed sample schema scripts in both side to transfer the data . Lets run the crawler and check it 

So both source and target tables are updated 

Lets Create Glue Job in AWS Console ,

After all , Lets schedule the job every 5 Minutes and sync the data

Whatever data is inserted in RDS PostgreSQL will be sync into Redshift Serverless Every 5 Minutes ,

So Quickly we can migrate and save our cost 

Any Troubles and issues Please contact me immediately !!!

Thursday, November 10, 2022

Wednesday, March 30, 2022

Friday, March 18, 2022

Oracle REST Data Services (ORDS) : Upgrade ORDS from 5.1.4 to 19.4

 We have upgraded Oracle Apex in the previous blog and next have to plan for below things 

  • Apex static images update for upgraded version
  • ORDS Upgrade to stable version 


  • Downloads the upgraded apex version in oracle RDS ( Apex 21.1.2 )
  • Download latest stable version of ORDS 19.4
  • Make sure you have already configured Oracle Client 19C and Java 1.8 is installed 

Apex Static Image Upgrade : 

Before upgrade apex images , we will receive below error while login apex workspace page 

Once downloaded the Apex bundle , 
  • Rename the existing apex folder from D:\apex to D:\apex_5.1.4
  • Unzip the folder into apex folder
  • Go to apex utilities folder 
  • Stop the ORDS running service 
Connect Oracle 19C in SQL Plus


D:\>cd apex

D:\apex>cd utilities


D:\apex\utilities>sqlplus dataadmin@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(

Connected to:
Oracle Database 19c Enterprise Edition Release - Production

Enter Password:

SQL> @reset_image_prefix.sql

Enter the Application Express image prefix [/i/] 

...Changing Application Express image prefix


PL/SQL procedure successfully completed.

...Recreate APEX global

PL/SQL procedure successfully completed.

Commit complete.

Image Prefix update complete

Disconnected from Oracle Database 19c Standard Edition 2 Release - Production


Once its completed , we will able to browse the apex pages without any issues 

ORDS Upgrade Paths 
Step 1 : 
Rename existing ords folder as ords_3.0.13 . As mentioned in prerequisites , unzip the downloaded ords- into ords folder 

Step 2 :
Copy the D:/apex/images folder into D:/ords/

Step 3:
Uninstall the existing ORDS version from Oracle RDS ,

D:\ords>java -jar ords.war uninstall 

Specify the database connection type to use. 

Enter number for [1] Basic  [2] TNS  [3] Custom URL [1]: 

Enter the name of the database server [localhost]

Enter the database listen port [1521]: 

Enter 1 to specify the database service name, or 2 to specify the database SID [1]: 

Enter the database service name:ORCL 

Requires to login with administrator privileges to verify Oracle REST Data Services schema. 

Enter the administrator username:dataadmin 

Enter the database password for dataadmin: 

Confirm password: 

Connecting to database user: dataadmin url: jdbc:oracle:thin:@//

Retrieving information. 

Uninstalling Oracle REST Data Services 

... Log file written to C:\Users\datablogsadmin\ords_uninstall_core_2022-03-16_133300_00152.log 

Completed uninstall for Oracle REST Data Services. Elapsed time: 00:00:07.840 
Step 4 :
Set Config Directory 
java -jar ords.war configdir D:\config

Step 5 :
Update passwords and unlock below accounts in Oracle RDS 
Connect Oracle 19C in SQL Plus

D:\apex\utilities>sqlplus dataadmin@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(

Connected to:
Oracle Database 19c Enterprise Edition Release - Production

Enter Password:

SQL>alter user APEX_PUBLIC_USER account unlock identified by Admin123;
SQL>exec rdsadmin.rdsadmin_run_apex_rest_config('Admin123','Admin123');
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('DBA_OBJECTS', 'DATAADMIN', 'SELECT', true);
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('DBA_ROLE_PRIVS', 'DATAADMIN', 'SELECT', true);
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('DBA_TAB_COLUMNS', 'DATAADMIN', 'SELECT', true);
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('USER_CONS_COLUMNS', 'DATAADMIN', 'SELECT', true);
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('USER_CONSTRAINTS', 'DATAADMIN', 'SELECT', true);
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('USER_OBJECTS', 'DATAADMIN', 'SELECT', true);
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('USER_PROCEDURES', 'DATAADMIN', 'SELECT', true);
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('USER_TAB_COLUMNS', 'DATAADMIN', 'SELECT', true);
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('USER_TABLES', 'DATAADMIN', 'SELECT', true);
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('USER_VIEWS', 'DATAADMIN', 'SELECT', true); 
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('WPIUTL', 'DATAADMIN', 'EXECUTE', true);
SQL>exec rdsadmin.rdsadmin_util.grant_sys_object('DBMS_SESSION', 'DATAADMIN', 'EXECUTE', true);
SQL>EXEC rdsadmin.rdsadmin_util.grant_apex_admin_role;

Once its executed , proceed the ORDS Installation

Step 6 :
Install the required database naming configuration setup for ORDS , By default it will install as apex 

D:\ords>java -jar ords.war setup --database dataadmin
Specify the database connection type to use.
Enter number for [1] Basic  [2] TNS  [3] Custom URL [1]:
Enter the name of the database server [localhost]
Enter the database listen port [1521]:
Enter 1 to specify the database service name, or 2 to specify the database SID [1]:
Enter the database service name:ORCL
Enter 1 if you want to verify/install Oracle REST Data Services schema or 2 to skip this step [1]:1
Enter the database password for ORDS_PUBLIC_USER:
Confirm password:
Requires to login with administrator privileges to verify Oracle REST Data Services schema.

Enter the administrator username:dataadmin
Enter the database password for dataadmin:
Confirm password:
Connecting to database user: dataadmin url: jdbc:oracle:thin:@//

Retrieving information.
Enter the default tablespace for ORDS_METADATA [SYSAUX]:
Enter the temporary tablespace for ORDS_METADATA [TEMP]:
Enter the default tablespace for ORDS_PUBLIC_USER [USERS]:
Enter the temporary tablespace for ORDS_PUBLIC_USER [TEMP]:
Enter 1 if you want to use PL/SQL Gateway or 2 to skip this step.
If using Oracle Application Express or migrating from mod_plsql then you must enter 1 [1]:
Enter the PL/SQL Gateway database user name [APEX_PUBLIC_USER]:
Enter the database password for APEX_PUBLIC_USER:
Confirm password:
Enter 1 to specify passwords for Application Express RESTful Services database users (APEX_LISTENER, APEX_REST_PUBLIC_USER) or 2 to skip this step [1]:
Enter the database password for APEX_LISTENER:
Confirm password:
Enter the database password for APEX_REST_PUBLIC_USER:
Confirm password:
Enter a number to select a feature to enable [1] SQL Developer Web [2] REST Enabled SQL [3] None [1]:1
2022-03-16T05:35:15.021Z INFO   reloaded pools: [|dataadmin||, |dataadmin|al|, |dataadmin|rt|, |dataadmin|pu|]
Installing Oracle REST Data Services version 19.4.6.r1421859
... Log file written to C:\Users\datablogsadmin\ords_install_core_2022-03-16_133515_00223.log
... Verified database prerequisites
... Created Oracle REST Data Services proxy user
... Created Oracle REST Data Services schema
... Granted privileges to Oracle REST Data Services
... Created Oracle REST Data Services database objects
... Log file written to C:\Users\datablogsadmin\ords_install_datamodel_2022-03-16_133527_00932.log
... Log file written to C:\Users\datablogsadmin\ords_install_apex_2022-03-16_133530_00191.log
Completed installation for Oracle REST Data Services version 19.4.6.r1421859. Elapsed time: 00:00:17.247

Step 7 :
Once installed ORDS , if you get any errors on ORDS users . Run below command in SQL PLUS



Step 8 : 
Start the ORDS Service 

java -jar ords.war

Step 9 :
If you need to map your ords link with multiple schemas , its must have URL mapping . To avoid confusion to access multiple workspaces 

D:\ords>java -jar ords.war map-url --workspace-id ss --type base-path /datablogs01 dataadmin 

Its all completed , if you have any issues and doubts please contact us 

Authors : 👷 Krishna and 👷 Selvackp

Monday, January 31, 2022

Migrate Azure MySQL Database to Amazon RDS for MySQL Using MySQL Replication

Its Nightmare Story struggled a lot to reduce the cut over time with Azure MySQL to AWS Migration MySQL Migration.

Tested Methods, 

  1. Backup and Restore - Its took 6 hours to complete
  2. AWS DMS - Text Data truncated and timestamp column data was 6 hours behind from the source

But Nothing helped due to Bugs, features unavailable etc.., But by default replication helped us to work. 

Two types replication available in Azure MySQL ,

1.GTID based Replication

    This is we already discussed with multiple topics in our blog for GCP cloud, also we will explain how to configure GTID based replication from Azure MySQL to AWS RDS in next blog

MySQL GTID Replication and lower_case_table_names

Multi Source Replication from GCP Cloud MySQL to Percona XtraDB Cluster

2.Binlog position-based replication

    We are performing binlog position-based replication to cut over the application in this blog

Environment Setup 

Below POC environment setup done for testing 
  • Azure MySQL 5.6.4 General Purpose instance launched with minimal configuration
  • AWS RDS for MySQL 5.7 launched with customized parameter group 
  • Network connectivity between Azure PaaS and AWS PaaS Service

Once environment is up and running, modify the below server parameters in both side 

Below values needs to update in Both environments, 

Azure MySQL: 

  • replicate_wild_ignore_table=mysql.%,information_schema.%,performance_schema.%,sys.%
  • binlog_row_image = FULL
  • binlog_expire_logs_seconds = 1440


  • time_zone = Same as Azure MySQL
  • binlog_format = ROW
  • collation and character_set parameters = Same as Azure MySQL

Now both server is ready to configure the replication

Pre-Steps to configure the replication

1.Let’s verify and take a note of binlog position in Azure MySQL   

 mysql> show master status.


| File                        | Position    | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |


| mysql-bin.00865 | 52884741       |              |                  |                   |


1 row in set (0.00 sec)

2.Create a replication user with necessary privileges

CREATE ‘repluser’@’%’ IDENTIFIED BY ‘datablogs123’.



GRANT SELECT, CONNECT ON *.* TO ‘repluser’@’%’;


3.Using mysqldump start the schema backup and followed by data backup 

mysqldump -h -u repluser@datablogs -p datablogsprod --no-data --routines --triggers --events > datablogsprodmeta.sql

mysqldump -h -u repluser@datablogs -p datablogsprod --routines --triggers --events --skip-add-drop-table  --max_allowed_packet=1024M --single-transaction  > datablogsproddata.sql

4.Once backup is completed restore the data into MySQL RDS , 

mysql -h -u repluser -p datablogsprod  < datablogsprodmeta.sql

mysql -h -u repluser -p datablogsprod  --max_allowed_packet=1024M  < datablogsproddata.sql

Configuring the replication 

In Amazon MySQL set the external master with the help of Step 1 binlog file name and binlog position 

CALL mysql.rds_stop_replication;

CALL mysql.rds_reset_external_master;

CALL mysql.rds_set_external_master ('', 3306, 'repluser@datablogs', 'repluser', 'mysql-bin.00865', 52884741, 0);

CALL mysql.rds_start_replication;

Once executed start the replication and check the slave status in RDS ,

    mysql> show slave status \G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: Master_User: repluser@datablogs Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.00865 Read_Master_Log_Pos: 52884741 Relay_Log_File: relaylog.000004 Relay_Log_Pos: 273 Relay_Master_Log_File: mysql-bin.00865 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: datablogsprod Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: mysql.plugin,mysql.rds_monitor,mysql.rds_sysinfo,innodb_memcache.cache_policies,mysql.rds_history,innodb_memcache.config_options,mysql.rds_configuration,mysql.rds_replication_status Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 52884741 Relay_Log_Space: 19742 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1053643462 Master_UUID: 787858b4-a021-11ea-b894-97f71069e028 Master_Info_File: mysql.slave_master_info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: 1 row in set (0.00 sec)

Post Validation and troubleshooting steps of Azure MySQL Replication

Validate the data and tables counts between Azure MySQL and MySQL RDS 

If we get any errors related with system schema in the Azure use the following method to fix it , we got same error like below ,

Can't find 'mysql.__firewallrules__' doesnt exist 

We can skip the error with below commands in MySQL RDS , 

CALL mysql.rds_stop_replication;
CALL mysql.rds_skip_repl_error;
CALL mysql.rds_start_replication;

But in MySQL RDS Row by row only errors will be skip and it will take long time to do it , follow the below method and check the binlog position until for the DML , DDL queries are captured in binlog 

SHOW BINLOG EVENTS IN 'mysql-bin.00865' FROM 52884567 LIMIT 10 \G

Note : Based on the error modify the binlog file and position in above command

Once found the binlog position repeat the configuring replication step

Now All set for Azure to AWS data sync , now its ready for application cutover with zero downtime !!!


Friday, January 21, 2022

Export/Import Data on Amazon Oracle RDS using Data Pump utility

Its easy to refresh the schemas in Oracle RDS , We can do one time for Testing or Development Purpose 

But if its needs to run on daily basis , here is the automated code for achieve the solution  

GitHub Link for Source Code :

Wednesday, October 14, 2020

RDS Snapshot Share with Automated or Manual Backups ?

Objective :

Launch production server clone in to another AWS account using RDS snapshots

We can do ?

There are multiple ways to do RDS data extract in AWS . We can take using manual snapshot , automated snapshot , export data to S3 and AWS backup service

What we can do most of time ?

To create clone of production server , it is easy way to create snapshot and launch new instance

But , Our Requirement to copy the snapshot in to different AWS account and launch copy of production .

Mostly we try with RDS automated snapshots to copy or share into different account . But in this case we can't share automated snapshots to different account

Automated snapshots

We can export data to S3 as well , but its required some efforts as well .

So possibilities is to take a manual snapshot and share into different account like below steps . Below screenshot refers manual snapshot of MySQL RDS in source AWS account

Source AWS account

Snapshot sharing into target AWS account

share snapshot to target account

Shared RDS snapshot on target AWS account

target AWS account

Then we can proceed to launch clone of production instance into different account .

Monday, August 3, 2020

AWS RDS Encryption

What is RDS Encryption ?

We can encrypt Amazon RDS DB instances and snapshots with enabling encryption option for our any amazon RDS instance . It means data is encrypted at rest including underling storage of DB instances , its read replicas , snapshots and automated backups

Amazon RDS encrypted DB instances use the industry standard AES-256 encryption algorithm to encrypt your data on the server that hosts your Amazon RDS DB instances. You don't need to modify your database client applications to use encryption.

For encrypted and unencrypted DB instances, data that is in transit between the source and the read replicas is encrypted, even when replicating across AWS Regions

Possibilities to encrypt RDS Instance :

Using snapshot copy option we have to enable encryption for RDS snapshot , and restore the snapshot with new instance

  1. Take snapshot of current production instance
  2. Copy snapshot with enabled encryption
  3. Restore the snapshot with different instance identifier
  4. Rename the current production instance identifier to proddb-old

Once renamed production instance , rename instance identifier of encrypted RDS to current production name

Steps to Encrypt RDS instance : 

Step 1 : Take a snapshot of unencrypted RDS instance with any specified name

Take a snapshot

Step 2 : Make a copy of snapshot with encryption enabled option

copy snapshot

Here , we can add default master key else if any consumer keys available use the same

Note : Encrypted read replicas must be encrypted with the same key as the source DB instance when both are in the same AWS Region

encryption enable

Step 3 : We are ready with encryption enabled snapshot copy


Step 4 : Restore rdssnapshotwithencryption

restore snapshot

We have launch the instance identifier with rdssnapshotwithencryption

Step 5 : Except Naming convention and other network parameters should be same as unencrypted RDS instance

DB Instance identifier : encrypted-instance

Virtual private cloud (VPC) : Same like unencrypted instance  

new instance launch

VPC security group : Same like unencrypted instance

DB instance class : Same like unencrypted instance

Step 6 : Once instance has been launched , verify the configuration of encryption

configuration validation

Step 7 : Instance identifier change

Change instance identifier name to _old for unencrypted instance , and change encrypted instance name to production name

identifier change

Step 8 : verify the application connectivity with encrypted instance

If anything goes wrong , we just need to rename the instance Identifier name in max 2 minutes without major downtime

References :

Sunday, July 12, 2020

[SQLState XX000] ERROR: User arn:aws:redshift:ap-south-1:316720341464:dbuser:redshift-cluster-1/analytics is not authorized to assume IAM Role arn:aws:iam::323232323:role/aws-access-for-redshift

While Configure Data Migration Service between Redshift and any kind of heterogeneous source , we come across these issues often .

Error looks like an IAM policy is missing for attached , so we straightly move into IAM console granted AmazonS3FullAccess AmazonRedshiftFullAccess , then restart failed DMS tasks .

But no luck , still we are getting same issue

When we looking into Redshift IAM role , customer have been added custom roles with permissions . so it is missing trusted entities for both and

Move into Trust relationships tab in custom role and edit trust relationship as below ,

  "Version": "2012-10-17",
  "Statement": [
      "Sid": "",
      "Effect": "Allow",
      "Principal": {
        "Service": [
      "Action": "sts:AssumeRole"
after adding trusted entities
Attached policies for DMS tasks

Once we update trust policy , able to load data between MySQL to Redshift

Remember to troubleshoot DMS tasks in depth , always enable detailed debug in cloudwatch logs