Timeline for your convenience: 01:10 - Let's talk about Databases. 04:10 - What is AWS RDS? Visual Explanation? 05:30 - Benefits of Using RDS over EC2 deployed Databases 12:56 - What is Amazon RDS Read Replication? 17:45 - What is Amazon RDS Read Replication for Multi-AZ? Click on the link below to subscribe : URL: tinyurl.com/qqebnwz
Hey hii... You doing a great job, your teaching style was excellent...can you do a video on custom metrics creation on instance level and RDS level..... Hope you getting my request.....thank you
is read replica also serve as a standby replica (who takes over when failure occurs) or there is the difference between read replica and standby replica?
In Amazon RDS (Relational Database Service), both read replicas and standby replicas serve important roles in terms of availability and scalability, but they have distinct purposes and characteristics: Read Replica: A read replica is a copy of the source (master) database that is asynchronously replicated to provide read scalability and offload read traffic from the primary instance. Read replicas are primarily used to distribute read queries and improve the performance of read-heavy workloads. They are not automatically promoted to become the primary instance if the primary instance fails. Read replicas can be in different availability zones to improve availability and durability, but they are not meant to serve as failover targets. Standby Replica (Multi-AZ): In Amazon RDS, when you enable Multi-AZ deployment for a primary instance, a standby replica is automatically created in a different availability zone. The standby replica is a synchronous copy of the primary instance, which means it is kept in sync in real-time with the primary instance. If a failure occurs with the primary instance, the standby replica can be automatically promoted to become the new primary instance to minimize downtime. Standby replicas are used to enhance high availability and failover capabilities of the primary instance. Unlike read replicas, standby replicas are designed to take over in case of a primary instance failure and serve as a failover target. In summary, while both read replicas and standby replicas play important roles in Amazon RDS, a key distinction is that standby replicas are used for failover and high availability scenarios, while read replicas are used for scaling read operations and improving performance.
Hey no worries its a good question. A read replica is typically up and running continuously, rather than only running when a failover is initiated. The primary purpose of a read replica is to offload read queries from the primary database server, thus improving performance and reducing the load on the primary server. This is achieved by maintaining a real-time copy of the primary database, with the read replica continuously syncing data from the primary server. In some configurations, the read replica can also be promoted to serve as the primary database during a failover, but that is not its primary function. The failover mechanism is usually associated with database replication, which involves having multiple standby databases that can take over when the primary database fails. These standby databases can be set up as read replicas, but it's essential to note that read replicas are not always used for failover purposes. So, to answer your question, a read replica is typically always up and running, but its primary purpose is to handle read queries and reduce load on the primary server, rather than being used only during failover events.
Timeline for your convenience:
01:10 - Let's talk about Databases.
04:10 - What is AWS RDS? Visual Explanation?
05:30 - Benefits of Using RDS over EC2 deployed Databases
12:56 - What is Amazon RDS Read Replication?
17:45 - What is Amazon RDS Read Replication for Multi-AZ?
Click on the link below to subscribe :
URL: tinyurl.com/qqebnwz
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These overview of the AWS topics are so perfect, thank youuuu
Keep them coming, great videos mate! 👌🏽
Hey hii... You doing a great job, your teaching style was excellent...can you do a video on custom metrics creation on instance level and RDS level.....
Hope you getting my request.....thank you
thanks for the support 🙏
sure will do that 🙌
Wow. Awesome content
Bs itna hi 😉😉😉😉
In this video at 11:24 min Bullet point 6 have same description as bullet point 3 Monitoring DB and Hardware Upgrades
Aarna Girdhar thanks. I will check and rectify that.
Thanks for pointing it out. I will update it
@@Pythoholic bbbbbbb
@@Pythoholic bbbbbbbbbbbbbbgb6bbbb
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what is difference between Read replication functionality and muly AZ functionality?
helpful :)
is read replica also serve as a standby replica (who takes over when failure occurs) or there is the difference between read replica and standby replica?
In Amazon RDS (Relational Database Service), both read replicas and standby replicas serve important roles in terms of availability and scalability, but they have distinct purposes and characteristics:
Read Replica:
A read replica is a copy of the source (master) database that is asynchronously replicated to provide read scalability and offload read traffic from the primary instance.
Read replicas are primarily used to distribute read queries and improve the performance of read-heavy workloads.
They are not automatically promoted to become the primary instance if the primary instance fails.
Read replicas can be in different availability zones to improve availability and durability, but they are not meant to serve as failover targets.
Standby Replica (Multi-AZ):
In Amazon RDS, when you enable Multi-AZ deployment for a primary instance, a standby replica is automatically created in a different availability zone.
The standby replica is a synchronous copy of the primary instance, which means it is kept in sync in real-time with the primary instance.
If a failure occurs with the primary instance, the standby replica can be automatically promoted to become the new primary instance to minimize downtime.
Standby replicas are used to enhance high availability and failover capabilities of the primary instance.
Unlike read replicas, standby replicas are designed to take over in case of a primary instance failure and serve as a failover target.
In summary, while both read replicas and standby replicas play important roles in Amazon RDS, a key distinction is that standby replicas are used for failover and high availability scenarios, while read replicas are used for scaling read operations and improving performance.
at 17:44 of video what is difference between standalone and primary database?
how much delay is there between actual write of data on primary database and get refreshed to read replica?
does read replicas charge seperately? if yes how they are charging?
Hello , It may sound like dumb question but :
Is read replica always up and running or it only runs when failover is initiated ?
Hey no worries its a good question.
A read replica is typically up and running continuously, rather than only running when a failover is initiated. The primary purpose of a read replica is to offload read queries from the primary database server, thus improving performance and reducing the load on the primary server. This is achieved by maintaining a real-time copy of the primary database, with the read replica continuously syncing data from the primary server.
In some configurations, the read replica can also be promoted to serve as the primary database during a failover, but that is not its primary function. The failover mechanism is usually associated with database replication, which involves having multiple standby databases that can take over when the primary database fails. These standby databases can be set up as read replicas, but it's essential to note that read replicas are not always used for failover purposes.
So, to answer your question, a read replica is typically always up and running, but its primary purpose is to handle read queries and reduce load on the primary server, rather than being used only during failover events.
That’s a great explanation thank you…
nice
Sir, is this channel covering new changes to the exam after June 30?
Yeah, So the videos that I have mentioned, SAAC02 in the title will be for the changes after June 2020
@@Pythoholic Is there anyway I can contact on email?
boxitupsam@pythoholic.com
just one feedback, you have mixed read replicas and fail over instance with each other.
Thanks for the feed back I will check and rectify if needed