cpu

The Qotom C3758R Unit Continued…

Posted on by dk

Just a quick update on networking experiences with this fanless (but hot) unit…

 

Why Is It Not In Sync? (buy buy buy)…

For some odd reason, throughput on stock Ubuntu 24.04 LTS via a 10GbE SFP+ module was showing asymmetrical speeds on iperf3 – ~10Gbps in, but only ~6Gbps out. Checking the firewall, ensuring jumbo packets (9000 byte MTU), ensuring ufw was disabled, disabling all forms of NIC offloading (although this may actually be inverse to the intended) did not change anything. Furthermore, htop showed one core constantly maxing out when sending (but hovering 60% to 75% on receiving).

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Server Upgrade

Posted on by dk

Ever since the idea of setting up my own reliable server had me thinking “I need ECC”…

So, over the period of some 6 months, I finally bit the bullet (not to mention the credit card) and purchased an Asrock C236WSI, Intel Xeon E3-1225v6 and 2x Kingston ValueRAM ECC DDR4 2400MHz 16GB UDIMMs… Culminating in final receipt of all the items in July 2017 (I purchased the two sticks of RAM within a day of each other, but Amazon shipped the wrong item for the second stick… twice).

So yes, this post is long overdue… And basically explains the long gap between the last post mid-2017 till now – I have been fighting with this new server hardware and the original draft was first drawn up in September 2017 (refer to date in the URL/permalink).

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