Azure Private Link now available in Preview!

With an increased security and privacy in mind Microsoft has been working on private links to Azure resources. Azure Private Link is a secure way to consume Azure Services like Azure SQL and Azure Storage using a private connection in your own VNet. This will replace the need for IaaS hosted virtual machines with SQL Server or the file server role installed.

Afbeeldingsresultaat voor azure private link

Azure Private Link brings Azure services inside the customer’s private VNet. The service resources can be accessed using the private IP address just like any other resource in the VNet. It is basically an NIC inside one of your VNET’s. This will allow all traffic to flow over the internal network, and will not go over the internet. There is no need to put gateways or any other network devices in place to make this happen.

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Azure Ultra Disk performance storage now available!

For very high demanding workloads, storage wise, Azure has released Ultra Disk performance tier for production use. I’ve already written about it in a previous post ( Slow IOPS in Azure VM’s? not anymore!) But now is the time to take a deeper look.

Which disk types do we have in Azure?

In the following table you can see what the difference is between all disk types in Azure. This table should help you to decide which disk to use for specific workloads.

Standard HDDStandard SSDPremium SSDUltra SSD
ScenarioBackup, Fileserver,
non-critical,
infrequent access
Webservers,
lightly used
applications and
dev/test systems
Production and
performance
workloads
IO intensive
workloads.
(SQL/Oracle/
SAP HANA)
Max disk
size
32TB32TB32TB64TB
Max
Throughput
500MiB/s750MiB/s900MiB/s2.000MiB/s
Latency8 > ms< 9 ms1 – 4 ms<1 ms
Max
IOPS
2.0006.00020.000160.000
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Slow IOPS in Azure VM’s? not anymore!

In Azure there are several ways to implement your VM storage. I get a lot of complaints about slow storage in Azure. In this article I will try to explain why this might be slow, and what you can do about it. There are multiple locations where the limit might be hit. So I will address all in the following topics.

Virtual machine type

The first limitation might be coming from your virtual machine. Each type has its own total IOPS limit. Thus by adding more disk or faster disk than the type and size allows will not make any speed difference in the end. One of the obvious reasons for faster disk performance is to use SSD disks instead of HDD.

Example of an IOPS limit on VM type

But keep in mind, not all virtual machines do support Premium SSD Storage, with an effective limit of 500 IOPS per disk, like in the Av2 series. And then there is host caching, that effects performance as well. A few examples:

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Kies je de juiste plek voor je data opslag in Azure

In Microsoft Azure zijn er meerdere manieren om je data op te slaan. Hierbij is het van belang om de juiste locatie te kiezen. Er zijn meerdere factoren van belang voor de keuze. Om te kunnen kiezen is belangrijk om te weten welke opslag mogelijkheden er zijn in Azure. Een kort overzicht:

Om te bepalen waar de data komt te staan zullen we moeten inzoomen op de data zelf. Wat voor data is het eigenlijk? En wat zijn de eigenschappen? Voor beide vragen zijn er 3 opties:

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