Recent Posts by Stefan Hinker

In a previous blog post, I introduced the Oracle Cloud Metering API. The logical next step is to wrap some Python functions around the API calls and use them to get meaningful reports for a tenancy. This is what I’ll discuss here for a sample use case. For the sake of this example, let’s assume we’re interested in cost by compartment. This could easily be modified to use any other type of cost tracking tags. But since compartments are already prepopulated and all OCI resources...

Anything the OCI Console displays is the result of REST calls to one of the various APIs through which all OCI services are available. After all, the Console is just as much a client to these APIs as the OCI CLI, the Python SDK or the Terraform provider. However, there is one area where the Console provides data not available via any of these other API clients: Cost Analysis. In fact, looking over the list of the OCI APIs , none seem to address this topic. The Budgets API (see...

In my previous post, I described how to setup a highly available GusterFS server environment using terraform. I briefly mentioned the provisions I had taken to ensure high performance as well, but didn't go into details of performance validation. This is what I'll do here. To recap, the expected maximum performance from the three Gluster servers was: 3 GB/sec write throughput 9 GB/sec read throughput To measure this performance, we need a sufficient number of Gluster clients and...

GlusterFS is a well known, scalable, high performance shared filesystem. It is easy to install either on premises or in the cloud. Guides for this can be found in many places, including here and here. However, after you built your second or third Gluster environment, you start thinking of automation, especially when you are in the cloud. Automation not only provides a quick way of creating a new environment when you need it. It also delivers reproducible and thus reliable...

I've been with Sun and Oracle for a long time.  In fact, just a few months ago I was invited to a 20 year anniversary celebration - just a few days before my 21st year was complete ;-)  So, it's been a while, and over the years, the primary tool for working has, of course, been a keyboard attached to some sort of data processing and display unit.  And, not surprisingly, this device adapted to change just as I did, all the various job role changes included.  For those...

While working on a virtual box appliance for our field engineers, I was confronted with a side effect of the copy-on-write behavior of ZFS and had to find a way to get around it.   Here's the story: The appliance will include a software repository.  To have sufficient space for unpacking and building, I created a virtual disk of 50GB in size.  As things went along, I had to create and delete a rather large collection of files a few times.  Once complete, ZFS told me it had...

This is more a note to myself than anything else... I'm currently studying some details of NTP and ran across this page, which is really helpful. :-)

Das ist eher eine Notiz fuer mich selbst als sonst irgend etwas... Ich bin bei der etwas eingehenderen Beschaeftigung mit NTP auf diese Seite gestossen, die wirklich hilfreich ist... :-)

Oracle is renovating the blogging infrastructure.  That means that in a little while, there will be a new look and feel to this blog.  In the meantime, there'll be a short interruption to my blogging.  The good news:  The URL as well as all the blog's contents will remain available, as far as I know. See you again in a while!