How to cluster SAP ASCS/SCS with SIOS DataKeeper on VMware ESXi Servers
This article describes the steps you take to prepare the VMware infrastructure for installing and configuring a high-availability SAP ASCS/SCS instance on a Windows failover cluster by using SIOS DataKeeper as the replicated cluster storage. Create the ASCS VMs For ... continue reading
How to use Azure Site Recovery (ASR) to replicate a Windows Server Failover Cluster (WSFC) that uses SIOS DataKeeper for cluster storage
Intro So you have built a SQL Server Failover Cluster Instance (FCI), or maybe an SAP ASCS/ERS cluster in Azure. Each node of the cluster resides in a different Availability Zone (AZ), or maybe you have strict latency requirements and ... continue reading

Improve scalability with Buffer Pool Parallel Scan in SQL Server 2022
This blog post is part of the SQL Server 2022 blog series.Buffer Pool Parallel Scan is a new feature in SQL Server 2022 that improves the scalability of several common scenarios in SQL Server and as a result, could significantly ... continue reading
Failover Cluster File Share Witness and DFS
First published on MSDN on Apr 13, 2018 One of the quorum models for Failover Clustering is the ability to use a file share as a witness resource. As a recap, the File Share Witness is designated a vote in ... continue reading
AWS BYOC – Bring your own SQL Server cluster with AWS EC2 and SIOS
Nice blog post from SQL Server expert Steve Rezhener. DataSteve Introduction They are multiple options to implement HADR solution for SQL Server in AWS public cloud. The easiest way to do that is to use AWS Database as a Service ... continue reading
How to Switch a Failover Cluster to a New Domain
First published on MSDN on Jan 09, 2018 For the last two decades, changing the domain membership of a Failover Cluster has always required that the cluster be destroyed and re-created. This is a time-consuming process, and we have ... continue reading

Threat matrix for storage
The move to cloud is happening faster than ever before and organizations are increasing their dependency on cloud storage services. In fact, Microsoft Azure Storage services are one of the most popular services in the cloud. Companies need effective threat ... continue reading

Step-by-Step: iSCSI Target Server Cluster in Azure
I recently helped someone build an iSCSI target server cluster in Azure and realized that I never wrote a step-by-step guide for that particular configuration. So to remedy that, here are the step-by-step instructions in case you need to do ... continue reading
Windows CA Performance Numbers
First published on TECHNET on Jan 11, 2010 Below are some numbers we have measured when testing the Windows CA in our lab environment. Note that the numbers will change and depends on many factors (network topology, request types, other ... continue reading

Changing the Monolith—Part 3: What’s your process?
In my 25-year journey, I have led security and privacy programs for corporations and provided professional advisory services for organizations of all types. Often, I encounter teams frantically running around in their own silos, trying to connect the dots and ... continue reading