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Day: March 29, 2019

Deploying Azure Databricks in a Custom VNET

Published 2019-03-29 by Kevin Feasel

Abhinav Garg and Anna Shrestinian explain how you can use VNET injection with Azure Databricks:

To make the above possible, we provide a Bring Your Own VNET (also called VNET Injection) feature, which allows customers to deploy the Azure Databricks clusters (data plane) in their own-managed VNETs. Such workspaces could be deployed using Azure Portal, or in an automated fashion using ARM Templates, which could be run using Azure CLI, Azure Powershell, Azure Python SDK, etc.

With this capability, the Databricks workspace NSG is also managed by the customer. We manage a set of inbound and outbound NSG rules using a Network Intent Policy, as those are required for secure, bidirectional communication with the control/management plane. 

This is a good article if the defaults won’t get past corporate security.

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SQL Server Numerology

Published 2019-03-29 by Kevin Feasel

Denis Gobo has some fun with SQL Server numbers of importance:

I was troubleshooting a deadlock the other day and it got me thinking…. I know the number 1205 by heart and know it is associated to a deadlock.  What other numbers are there that you can associate to an event or object or limitation. For example 32767 will be known by a lot of people as the database id of the ResourceDb, master is 1, msdb is 4 etc etc.

So below is a list of numbers I thought of

Leave me a comment with any numbers that you know by heart

BTW I didn’t do the limits for int, smallint etc etc, those are the same in all programming languages…so not unique to SQL Server

Read on for Denis’s list.

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Ways to Use Power BI Dataflows

Published 2019-03-29 by Kevin Feasel

Melissa Coates gives us three use patterns for Power BI Dataflows:

In this first option, Power BI handles everything. We use the web-based Power Query Online tool for structuring the data. Power BI handles scheduling the data refresh.

The underlying data behind the dataflow is stored in a data lake. However, since it’s fully managed, this data lake is not directly accessible or visible to the customer. As with most cloud-based implementations, the infrastructure is hidden under the covers. This is what is happening if your users are utilizing dataflows currently but you haven’t specified a data lake account in the Power BI admin center.

Melissa gives us a great summary of the three patterns, so read the whole thing.

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Comparing Oracle RAC to SQL Server Availability Groups

Published 2019-03-29 by Kevin Feasel

Kellyn Pot’vin-Gorman explains the difference between Oracle RAC and SQL Server Availability Groups:

There is a constant rumble among Oracle DBAs- either all-in for Oracle Real Application Cluster, (RAC) or a desire to use it for the tool it was technically intended for. Oracle RAC can be very enticing- complex and feature rich, its the standard for engineered systems, such as Oracle Exadata and even the Oracle Data Appliance, (ODA). Newer implementation features, such as Oracle RAC One-Node offered even greater flexibility in the design of Oracle environments, but we need to also discuss what it isn’t- Oracle RAC is not a Disaster Recovery solution.

Click through for a good high-level contrast, as these are quite different products.

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SSMS 18.0 RC1

Published 2019-03-29 by Kevin Feasel

Dinakar Nethi announces the first release candidate of SQL Server Management Studio 18.0:

As we get closer to the General Availability of SQL Server Management Studio (SSMS) 18, we have decided to have a quick release of the Release Candidate (RC) build.

You can download SSMS 18.0 RC1 today and for more details on what’s included, please see the Release Notes.

It’s been in preview for a while but things are now getting real. I’ll have to check later on if it fixes the bug I found with PolyBase on SQL Server.

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