The sm1000 is an interesting bit of technology implemented as a microphone to bring digital voice to almost any ham receiver. The microphone implements the codec2 voice codec designed by David Rowe in hardware, replacing the need for a pc running freedv.
Im looking forward to making some cables for my ic-7100 and ft-857d and trying it out.
It was nice to see David was recently awarded at the WIA conference for his contributions to amateur radio, specifically with Codec2, FreeDV and now the SM1000.
I’m happy with the performance of the web site on the new AWS Instance. The initial instance was the ‘t1.micro’ which is the old option from Amazon using para-virtualisation (PVM), unfortunately performance on this instance was terrible as access was capped at 10% of the CPU and the cycles ‘stolen’ exceeded 90%.
Instead of sticking with the poor performing PVM I’ve opted to moved to a HVM instance which allows for bursts in processing capability above the subscription level, providing you have sufficient cpu credits available that is.. A CPU Credit is simply an accounting of when your not using the full amount of CPU your subscribed to, so you can use it to burst later.
I’ve also enabled caching via Amazon CloudFront, which will cost a little extra but delivers all the large content (images, style sheets, etc) via the AWS Cache and Proxy servers reducing load time for the user and reducing performance overheads on the virtual server.
The change in performance with both of these changes is significant with page rendering times down under 5 seconds for all content. I’m hopeful that this will continue to be the case.
The site has been fully migrated to the new instance, and the mailing list migration will likely occur next week.
The vk2bv.org web site has been migrated to a new AWS instance to provide better performance as the original instance type simply wasn’t adequately resourced. The new instance is already proving more capable and performant.
If there are any issues please email me at jason AT ball.net and I’ll get onto it ASAP.
A quick post to remind people that there is a variety of club merchandise available on Cafe Press. I’ll add a merchandise page to the web site just as soon as I find a cafe press plugin that actually works, in the meantime wander over, have a look, and buy something knowing a little of that purchase comes back to the club.
The WARS home page should be significantly faster now as I’ve just switched enabled Amazon Cloudfront for all media files, this provides a very fast front end cache (aka CDN – Content Distribution Network) taking the load off the (small) server we have hosting the web site.
Hopefully this will also help with the occasional ‘stalls’ we are getting due to the current t1.micro instance, which will continue until I migrate the pages to a reserved instance.
If anybody experiences any issues with this, please let me know.