I want to connect a Read-Only replica for reporting purpose in Azure SQL managed instance. For this, I tried to add an ApplicationIntent=ReadOnly parameter.
But it is still it not connecting the Read-Only replica. So is there any configuration required to connect Read-Only replica in Azure MI?
Azure SQLMI Business critical service tier has Built-in additional read-only database replica that can be used for reporting and other read-only workloads similar to azure sql database premium tier. It is enabled by default no user action required. You need to use 'ApplicationIntent=ReadOnly' flag to access internal replica.
Azure support the replica feature , please see this tutorial Configure replication in an Azure SQL Database managed instance database.
But for ApplicationIntent=ReadOnly, it's not supported or applies to in Azure SQL managed instance.
You can reference this document: SQL Server Native Client Support for High Availability, Disaster Recovery.
Hope this helps.
Related
I would like to know what extra benefits one get by choosing Azure SQL Managed Instance compared to Azure SQL DB PaaS. I know SQL Managed Instance is offered as a vCore based purchasing model only. Apart from this what is the extra add on and benefits that one gets over the other. Any reply would be appreciated.
With Azure SQL Managed Instance, you essentially get a full fledged SQL Server that you can control any way you want, just like you would control a locally configured SQL Server. All the power and access and customization you want.
With, Azure SQL DB PaaS, you are essentially getting a database service, so, you give up a lot of control.
For example, take server collation. With the database service, SQL_Latin1_General_CP1_CI_AS , is all you get. With the Managed Instance, its your server. So, go ahead and select whatever collation you want, just like how you would select the collation at the time of creatoin.
Another issue is with auditing, if that is something that is important to your setup. with SQL Managed Instance, auditing happens at server level, because, you are getting the full database server. With the database service, it only database, because, you are only getting a database.
These are just the main details that I found. more details here at this Azure doc - https://learn.microsoft.com/en-us/azure/azure-sql/database/features-comparison
Of course, Managed is going to cost you more because you are paying for the license of the SQL server too.
Lastly, for me, this is the almost (not the exact same thing) like you running your own File Server on a Windows VM on Azure (Managed Instance) versus, just using Blob Storage. In both cases, you are just trying to store some files, but its how much control you have.
I would say think about Azure SQL DB vs Azure SQL Managed Instance (MI) as
Azure SQL DB = Resources dedicated to individual DBs like a container. They are grouped under a Azure SQL Server but that SQL Server is just for grouping.
Azure SQL MI = Almost same as on-prem SQL Server except you don't have to worry about OS, backups, high availability.
Here is a good comparison.
https://learn.microsoft.com/en-us/azure/azure-sql/database/features-comparison
Hopefully this will help
Azure SQL Database - The usual PaaS way. You have vCore, DTU, and Serverless billing mode. And Elastic pool support.
Azure SQL Managed Instance - Similar as below. When you want to use instance-scoped features of Azure SQL Managed Instance like Service Broker, CLR, SQL Server Agent, and Linked servers. As if you have an SQL Server on premise, Azure is responsible for patching, upgrading version etc.
SQL Server on Azure Virtual Machines - Similar as above. But you are responsible for OS and SQL server upgrade.
what is the best way to limit latency for SQL Azure in global applications?
My Application uses SQL Azure and would like to know based on the network location of users if its possible to connect SQL Azure near to users.
So Logically would need to have SQL Azure database with global replication but not geo-replication as each copy would serve as Master and not secondary.
Thank you in advance.
You may want to try CosmosDB to distribute data globally and obtain low latency as explained on this article and this documentation.
For replicating data using SQL Data Sync with Azure SQL Database, take in consideration paired regions which may reduce latency. With SQL Data Sync a hub database can be defined and many member database on another region, and data can be synched on both ways between the hub and any member database.
In Azure PAAS , When I create a SQL Database , it asks me to create a SQL Server why is this? Also as there are elastic pools why need a SQL Server?
Azure SQL Database and SQL Server PAAS - why need both?
Before answer this, let's see what is an Azure SQL logical server.For more information about Azure SQL logical server, please refer to this tutorial.
A logical server acts as a central administrative point for multiple single or pooled databases, logins, firewall rules, auditing rules, threat detection policies, and failover groups. A logical server can be in a different region than its resource group. The logical server must exist before you can create the Azure SQL database. All databases on a server are created within the same region as the logical server.
So the Azure SQL server is the dependency of the azure database. If you want to create an Azure sql database, an existing Azure SQL server is required. It is similar to a SQL Server instance that you may be familiar with in the on-premises world.
I have a "pay as you go" Azure subscription. I am trying to keep costs down.... Do I need the resource "SQL Server" when using the SQL database resource? As I read all the supporting documents SQL Server will be used on Azure VMs to extend on-premises SQL Server. I am not doing this, I am hosting a web application on the Cloud services (Classic) resource that is connecting to the Azure SQL database.
Thanks for the help!
Azure SQL Database gives you most of the functionalities of a "Standard" SQL Server database and is (in most cases) the choise with the lower costs.
It also provides you a set of additional functionalities (some of them needs to be enabled first or are part of the higher service tiers) like an out of the box 3-node failover cluster, geo-redundancy, automated backups, etc.
If you need additional SQL Server features like SQL Server Analysis Services, which are not part of Azure SQL DB or aren't provided as another Azure service, you need to create a Virtual Maschine with a real SQL Server installed.
The "SQL Server", which is hosting your Azure SQL DB, is just a wrapper and provides you only minimal features like user and role management or your firewall settings.
If your application is connecting only to Azure SQL database and using its features, you don't need SQL Server license. You just need to have the Azure subscription and pay for the SQL database(s) that you are using. However when you create an Azure SQL database, it will prompt you to create a "Server" resource which acts as a logical group for all of your SQL databases that you create within that "server". This server is NOT charged separately and just provides a logical grouping as well as a common connection point for your SQL databases. Your billing is always based on the SQL Database(s) that you create and use.
hope this helps.
Srini Acharya
Scenario: I have a server farm to deploy my web site. I want to try to add one server from Azure platform. Every host has a replication from one database server. I have tried to add the replication database but I got this message error:
Microsoft SQL Server Management Studio is unable to access replication
components because replication is not installed on this instance of
SQL Server. For information about installing replication, see the
topic Installing Replication in SQL Server Books Online. (New
Subscription Wizard)
After this message I suppose that something is missing in the sqlserver database Azure side.
I have googled something to solve my problem but without luck.
I have found one tool (Azure SQL Data Sync) and tried something to solve the problem but it didn't work.
From the Azure documentation, I have found that until V12 of the azure database replication wasn't available.
But what about v12?
Questions:Am I missing something with the version of the database? Should I change the database plan in Azure subscription?
Should I use some external tool that allow me to maintain sync my database server with the replication?
Replication is not yet available according to the MSDN even on V12. You can use https://azure.microsoft.com/en-us/documentation/articles/data-factory-introduction/ and https://azure.microsoft.com/en-us/documentation/articles/sql-database-get-started-sql-data-sync/. You can write your own sync logic with change tracking, Service broker and linked servers / safe CLR but better use the existing tools.
Maybe Azure Data Factory Service could be a solution for you?
https://azure.microsoft.com/en-us/documentation/articles/data-factory-introduction/