Hi I'm working on an application that has 200+ SQL Azure databases and one Web App instance.
The web application is frequently calling all these databases depending on the request (only one database connection is used per request).
The problem we have seen lately is that timeouts/other connectivity issues is happening more frequently.
I'm starting to think that it could be all the tcp/connections that needs to be maintained by the connection pool. Because of Azure SQL there will be one database connection per database in the pool, they can't share connection.
Is my assumption correct or could there be anything else?
Related
I am creating a WebService with C# Core 3.0 that is using MySQL and Redis, but I am not so familiar with Azure so I need advice about configuring everything.
I had MySQL hosted on AWS, but I am transferring it to Azure because I think that performance (speed) will be better on Azure because they will be on same data center. Right?
But, on my MySQL page Host is like '*.mysql.database.azure.com'. That means that every connection will go out of Azure, and than come back? I don't have some local IP for connection? Same question for Redis.
Do I need to configure some local network on Azure and will that impact speed on the app? And, is MySQL a good choice for Azure or should I try with another one?
I am just reading about Azure Virtual Networks. But as I understand it, VN's sole purpose is to isolate elements from the outside network?
You will get better performance if your my-sql instance and your app service are in the same region (basically the same data centre).
The connection string is mysql.database.azure.com, but remember the connection will be a TCP/IP connection, so the DNS lookup will realise that this address mysql.database.azure.com is in the same region (same data center). Then the TCP/IP connection will go to an internal IP.
You could use tcpping in your app service's kudo console to try this and see the result.
The basic rule is that you should group your app and database in the same region for better performance and cheaper cost (as Microsoft doesn't charge traffic within the same region).
Azure Virtual network is for a different purpose. For example, if you have some on premise database servers and you want to call these servers from azure, then VM could be helpful. But for the scenario you described, it is not really needed.
The company I work for has Microsoft azure support included, and if you or your company have support contract with them, you can raise questions directly to them and get really quick responses.
I have a Node.js/JavaScript application deployed to Bluemix. I need my application to be able to connect to a DB2 datasource (connection string shown below).
The lexbz181112.cloud.dst.ibm.com is an IBM server running on premise.
What steps do I need to take to connect to this datasource from my application (which is running in Bluemix)? I don't want to change any of my application code in order to read/write from the database.
DRIVER={DB2};DATABASE=MYDB;HOSTNAME=lexbz181112.cloud.dst.ibm.com;UID=xxx;PWD=xxx;PORT=nnnnn;PROTOCOL=TCPIP
It is the same when you connect your application to remote database or cloud database, as long as you have hostname:port, database name and username/password.
If your application and database both on Bluemix, have you tried to bind this database service to your application directly?
The Bluemix Secure Gateway service is used in such cases. It establishes a secure, transparent bridge between your on-premises resource, in your case the DB2 server, and your cloud application. Because it is transparent to the application you don't need to change your application code. The secure connection is established from "on-prem" to the cloud, so that the on-prem administrators are in charge.
Some time I ago I wrote a sample application to walk through all the steps to create a scenario as described by you. You can find the instructions on GitHub.
If the host is reachable from the Internet you can simply access it from your application as you'd normally do, since a Bluemix application is able to connect to the Internet. The only improvement I'd do to this is to use a user provided service instance. It allows you to separate the DB connection parameters from the application code, avoiding to have those hard coded in the application.
We are planning to migrate our Enterprise Application(s) from on-premises to Azure. Below are the high level details about our current infrastructure.
One Web Server hosting multiple WebSites (around 30 websites)
One Server with SSIS installed in it which processes huge data coming from multiple data sources and dumps the data into Pre-production database server explained in #3 below
Two Servers (Pre-production and Production) with SQL Server hosted in them where some jobs run on Pre-Produciton Server and the data gets replicated to the Production database server.
One Server where SSRS is hosted that uses data (and stored procedures) from Pre-Production database Server.
Could you please let us know if it is a good option to migrate the current infrastructe to PAAS? Is it really possible? We are also planning to leverage the other Azure features like Load Balancing on Web Servers and High availability on Production Database server with Active-Passive servers.
For migration scenarios, please see the following: https://azure.microsoft.com/en-us/documentation/articles/sql-database-cloud-migrate/
Trying to configure my SQL Connector API App named (CENTRAL.SQLCONNECTOR.EMPLOYEESYNC.DEV) to use the Hybrid Connection Manager. I have had to delete it and recreate multiple times assessing the query options, and confused because it seems very inconsistent to allow the Hybrid Connection setup. It currently reads below...
Hybrid Connection
Not configured as a hybrid ApiApp
The prior time it allowed it fine, and I was able to successfully setup the Hybrid Connection Manager on my web server. Could you please look at this api app, and maybe tell me what I may be doing wrong.
Thanks
I am new to Azure and just trying to get my head around some things.
I have a web app running locally that now connects to a windows azure SQL database. I want to move my local web app into an azure web role. I have two questions:
Do I need to change my connection string or does it just work?
I am assuming windows azure is smart enough to now know that they are both hosted on azure so each request no longer needs to go over the internet?
Cheers
Do I need to change my connection string or does it just work?
No, this is still that same connection string.
I am assuming windows azure is smart enough to now know that they are both hosted on azure so each request no longer needs to go over the internet?
You're both web site and SQL Azure database will be in Azure data center. It depends in which region your web site and database will be. If they are in the same region you'll have low latencies because it will be in the same data center, however if they are in two different regions, then at one point it has to go through connections between data centers called backbones. Even if those are special very fast connections you'll notice higher latencies.
http://www.azurespeed.com/ web site allows you to check what are the latencies between Azure data centers. This gives you a kind of idea.
Answer 1 : Since you are already connecting to SQL azure from local,
you don't need to change the connection string.
Answer 2: If both your Web Role, and SQL azure are in same Geo
Location (say SoutCentral US) then there will not be much internet
traffic, but it will use azure's network to communicate.