nbdkit is our toolkit for creating Network Block Device (NBD) servers from “unusual” data sources. nbdkit was already configurable by writing simple plugins in several programming languages. Last week Eric Blake and I added a nice new feature: You can now modify existing plugins by placing “filters” in front of them.
(You can also layer filters to arbitrary depth)
nbdkit 1.1.27 has three simple filters, and 1.1.28 will include two more, and you can write your own although (unlike plugins) filters do not yet have a stable ABI and we haven’t decided if we will offer a stable ABI in future.
I’ve been looking for replacements for my HP Microservers which according to this blog are now nearly 7 years old!. Although still going (sort of) strong: one of them failed completely, and another has developed a faulty cache manifested by random 32 byte wide web server corruption (yes, it’s also my main web server …)
My virtualization cluster is also coming up to 4 years old, and while it works fine it turns out that running servers without cases isn’t such a good idea because they generate large amounts of RF interference.
So you can tell that my current computing setup is held together with string and sticky tape. Can I make a nicer system based on a pile of NUCs? I bought 1 NUC for testing:
The total cost (including tax and delivery) was £583.96 from
scan.co.uk. I also specced up a similar system with an M.2 SSD which would have been about £670. (An ideal system would have both M.2 SSD and a hard disk but that gets even more expensive.) The NUC model is NUC7i5BNH and the Wikipedia page is absolutely essential for understanding the different models.
Enough talk, how well does it work? To start off with, really badly with the NUC regularly hanging hard. This was because of a faulty RAM module, a problem I’ve had with the Gigabyte Brix before. Because of that, I’m only running with one 8 GB module:
It has two real cores with hyperthreading. The cores are Kaby-Lake Intel(R) Core(TM) i5-7260U CPU @ 2.20GHz.
The compile performance is reasonable, not great, as you’d expect from an Intel i5 processor.