Operating systems

Dealing with WSFC 2016 quarantine state and availability groups

I was playing with my lab environment which includes Windows 2016 and SQL Server 2016 and I noticed an interesting scenario while testing cluster node failures. After simulating some network outage scenarios, I was not able to(…)

OEL 7 – Project Quotas on Oracle Homes with XFS on Oracle Linux 7

By William Sescu User and group quotas do exist for quite a while for all kind of file systems, like ext4 or vxfs and maybe many others. However, for my use case, I do need quotas for different directories on(…)

OEL 7 – How to disable IPv6 on Oracle Linux 7

By William Sescu In case you are not interested in IPv6, you can use the following HowTo to disable it on Oracle Linux 7. Unless you have something very very special on your System, these 10 Steps should do it.

Manage Azure in PowerShell (RM)

Azure offers two deployment models for cloud components: Resource Manager (RM) and Classic deployment model. Newer and more easier to manage, Microsoft recommends to use the Resource Manager. Even if these two models can exist at(…)

OTN Appreciation Day : OSWatcher Black Box Analyzer (OSWBBA)

Following my last blog post about OSWatcher, I will present in this one OSWatcher Black Box Analyzer (OSWBBA), which is the tool that you can use to display graphically the data collected by OSWBB. This tool is(…)

OTN Appreciation Day : OSWatcher Black Box (OSWBB)

In this post, I will present a usefull and easy-to-use Oracle tool : OSWatcher. What is it ? OSWatcher Black Box (OSWBB), for its full name, is a free Oracle Tool which will help you to diagnose(…)

Disable Red Hat 7 Transparent Hugepages

Ausgangslage Ein Kunde hat mich kürzlich angefragt, wie am effizientesten alle Kernel Tuning Parameter für Oracle bei Red Hat 7 konfiguriert werden können. Daraus habe ich untersucht welche Möglichkeiten es gibt, ausser dem seit langer Zeit bekannten /etc/sysctl.conf. Bei dieser Analyse(…)

Generate Azure VM with Resource Manager deployment in PowerShell

Recently, there is a new way to manage the Azure infrastructure with Resource Manager. It brings many advantages regarding the classic deployment. The differences between these two deployments will not be covered in this blog because it is(…)

List usernames instead of uids with the ps command for long usernames

By William Sescu Have your ever faced such a situation. You have usernames in your /etc/passwd file with more than 8 characters. This is no problem for Linux at all, usernames may be up to 32 characters long, only your(…)

How to do a Filesystem Resize (ext3/ext4) on Redhat running on VMware

By William Sescu A filesystem resize can be done in several ways, online, offline, with LVM2 or without LVM2.  However, this blog will describe how to do an online resize of ext3/ext4 filesystems where a virtual disk (vmdk) is online(…)