ned Productions Consulting


Technology musings by Niall Douglas
ned Productions Consulting
(an expert advice and services company based in Ireland)


Friday 11th August 2017 4.18am

You might remember that last year I spent lots of money on a MacBook Pro for one very specific reason: its NVMe SSD flash hard drive. Despite its supposed state-of-the-art performance, the various Windows benchmarking tools never really showed it to be particularly all that fast. Sure, with ridiculous queue depths and threads thrown at it then you could hit 3Gb/sec, but random 4Kb @ QD1 benchmarking always showed pretty poor results, maybe 2,500 IOPS (13Mb/sec) which is about a 400us average response time.

Friday 7th July 2017 3.30pm

My ZFS-on-Linux public facing server managed 289 days of trouble free uptime before today exhibiting massive i/o delay (see below) making it unusable without rebooting. That's the best it's ever achieved to date. Really shows how ZFS-on-Linux is becoming actually viable for reliable service provision, and as bug fixes land it's getting increasingly ever better. <br />top - 16:26:58 up 289 days, 23:27, 1 user, load average: 3.50, 2.19, 1.60<br />Tasks: 729 total, 1 running, 728 sleeping, 0 stopped, 0 zombie<br />%Cpu(s): 0.4 us, 0.8 sy, 0.0 ni, 86.5 id, 12.3 wa, 0.0 hi, 0.0 si, 0.0 st<br />KiB Mem: 16420640 total, 9778848 used, 6641792 free, 464 buffers<br />KiB Swap: 4194300 total, 0 used, 4194300 free.

Wednesday 7th June 2017 8.24am

Link shared: http://boost.2283326.n4.nabble.com/review-Outcome-Review-Report-tt4695267.html My proposed Boost.Outcome library's review report: http://boost.2283326.n4.nabble.com/review-Outcome-Review-Report-tt4695267.html. It was rejected after one of the lengthiest reviews in many years. Lots of good feedback on how it ought to look. #boostcpp #c++ #boost-outcome

Wednesday 7th June 2017 8.24am

Link shared: http://boost.2283326.n4.nabble.com/review-Outcome-Review-Report-tt4695267.html My proposed Boost.Outcome library's review report: http://boost.2283326.n4.nabble.com/review-Outcome-Review-Report-tt4695267.html. It was rejected after one of the lengthiest reviews in many years. Lots of good feedback on how it ought to look. #boostcpp #c++ #boost-outcome

Wednesday 7th June 2017 8.24am

Link shared: http://boost.2283326.n4.nabble.com/review-Outcome-Review-Report-tt4695267.html My proposed Boost.Outcome library's review report: http://boost.2283326.n4.nabble.com/review-Outcome-Review-Report-tt4695267.html. It was rejected after one of the lengthiest reviews in many years. Lots of good feedback on how it ought to look. #boostcpp #c++ #boost-outcome

Saturday 3rd June 2017 9.46pm

The peer review of my proposed Boost.Outcome library ended yesterday after being extended to two weeks to allow more discussion. Some 732 emails were sent on the topic, one of the most vigorous debates on boost-dev in many years, and a very highly productive one I think despite that we did not find consensus.

Saturday 3rd June 2017 9.45pm

The peer review of my proposed Boost.Outcome library ended yesterday after being extended to two weeks to allow more discussion. Some 732 emails were sent on the topic, one of the most vigorous debates on boost-dev in many years, and a very highly productive one I think despite that we did not find consensus.

Saturday 3rd June 2017 9.45pm

The peer review of my proposed Boost.Outcome library ended yesterday after being extended to two weeks to allow more discussion. Some 732 emails were sent on the topic, one of the most vigorous debates on boost-dev in many years, and a very highly productive one I think despite that we did not find consensus.

Wednesday 31st May 2017 8.08pm

As I do this time every year, here is my time series graph of spinning rust storage per inflation adjusted dollar as against flash storage, updated with data for 2017. As you will note, flash storage actually is more expensive this year than last by 5-10% probably due to the global flash memory shortage, and I also see that Intel's NVMe SSDs are as competitive as their non-NVMe SSDs for the first time, so I used the NVMe products.

Friday 26th May 2017 12.37pm

Link shared: http://cppcast.com/ My recent radio interview on the Google Summer of Code programme at Boost and my proposed Boost.Outcome library currently undergoing peer review.

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