Windows Task Manager – what do the memory columns mean?
I have recently been using Windows to tune a Java application I created to move large amounts of data into a database. The application was very memory hungry as it implemented various queues to buffer...
View ArticleLinux Runlevels explained
A Linux runlevel dictates the state that the machine is currently operating, and what applications or services should be running at that time. The runlevel is specified as a number between 0 and 6...
View ArticleProxmox Firewall Rules
Proxmox uses various ports for communication between either a user and the server or between multiple servers in a cluster. You may need to proxy or port forward some of these ports for external access...
View ArticleThe Difference Between a tmpfs and ramfs RAM Disk
There are two file system types built into most modern Linux distributions which allow you to create a RAM based storage area which can be mounted and used link a normal folder. Before using this type...
View ArticleWhat is tmpfs?
A disk drive storage is usually persistent, that is, anything that is written to it will always be there exactly as it was written until it’s deleted or modified by an application. Power failures or...
View ArticleMy Proxmox VE Bash Scripts on GitHub
I’ve created a public repository on GitHub with few Bash scripts which may (or may not) be helpful for anyone administering a Proxmox VE Server. I’ll add to this repository over time with any new...
View Articleqcow2 Disk Images and Performance
qcow2 is a virtual disk image format developed by the guys who created QEMU and is one of the most versatile virtual disk formats available. It’s the default and preferred virtual disk format for the...
View ArticleWhere to Run Ceph Processes For High Availability
Get Social!In this blog post we’re going to take a detailed look at the Ceph server processes within a Ceph cluster of multiple server nodes. Ceph is a highly available network storage layer that uses...
View ArticleCassandra Firewall Ports
Get Social!Cassandra uses various ports for communication, either server to server communication or client to server communication. If you’re using Cassandra in a firewalled environment you may need to...
View ArticleOracle Database INTERVAL Partitioning Date Error With 31-12-9999
Get Social!You may have seen the below error when using dates at the extremes with an Oracle Database. This post focuses on the scenario where you’re inserting a high date, such as 31-12-9999 into an...
View ArticleOracle Database INTERVAL Partitioning and Virtual Columns
Get Social!I bumped into this issue recently which prevents you INSERTING a date of 31-12-9999 into an INTERVAL partitioned table due to the fact that the LESS THAN partition value would be larger than...
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