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On IMAP servers, there will be mailboxes(folders) which are dedicated to very specific content, such as: Sent Messages: When sending an e-mail, a copy will be stored there Deleted Messages: When pressing the „Delete“ button, the marked e-mail(s) will be moved in this folder Most often, these folders are outlined with icons in the e-mail […]

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Aquiring data about the I2S capabilities of currently available mini computers proofs to be quite difficult. While there is some information about the I2S capabilities of the RPi, there seems to be nearly to none about the Odroid C1+ mini computer which was released in Summer 2015. However, in order to decide which platform is […]

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After years of experience with Linux + KVM, a very reliably solution, the next step seems to implement high availability (HA), which basically has the following advantages: Multiple nodes are accumulated to one cluster, which share storage that holds all VM data Virtual machines (VM) on these nodes can be migrated from one node to […]

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For testing the I2S bus of an electronic audio circuit I needed audio test signals, such as sine, square etc. Interestingly (and unfortunately) it seems hard to get such test signals, especially when the values of these test signals should be predictable, e.g. in case of a square wave with a bit depth of 16 […]

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Since recently I have a Supermicro Node Server at our hands which we are planning to use for a hot-standby system. A vital point for replication and hot-standby is a reliable and fast network connection between the nodes. The Supermicro nodes implement an Infiniband Mellanox network adapter, which claims to provide transfer rates of up […]

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We recently needed some tools for automating our financial controlling, therefore we required automatic retrieval of account balances and transactions. In order to integrate it in our environment we needed some tool to automatically insert it in a relational database. Unfortunately we could not find any appropriate tools to do so – especially not for […]

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I came across a scenario where I needed to shutdown and lock one or more Microsoft Windows PCs remotely. This should work automatically, without VNC / Remote desktop or similar tools, so that it can be scheduled in some way. Applications for this would be: Shutting down a number of PCs, e.g. in an Internet […]

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For years, I used the very handy rsnapshot script for backup up data. However, rsnapshot cannot handle huge files that change a little over time very well. It seems that rdiff-backup works quite similar and can handle the huge-file scenario better, although accessing older is complicated. However, adding archfs may be the solution, so this […]

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