Interesting idea. Can a docker swarm work for a hardware device? I've always thought of them as responding to HTTP requests.
I have not tried a thumb drive. My original intention was to try different drive configurations, but I need the SD card to die first and free up the instrument and RPi. After 3 years, I'm still waiting.... -tk On Mon, Nov 13, 2017 at 7:26 PM, Robert Mantel <[email protected]> wrote: > Great stuff Tom, I had to abandon my Pi as it was starting to get flakey > and locking the database. I totally ported it to my freenas box in a VM > for now, but my goal is to get 2 more Pi 3's and create a docker swarm with > all three nodes as master nodes. That way if I loose one, it stays up and > I can replace the bad card without interruption. We're going to be > building an off grid house so this will be the brains of the house > (including the weather and home automation) so it's going to have to be as > bulletproof as possible. I may connect an SSD to it just for extra storage > but keeping the power consumption small will be the key. > > Have you tried using USB thumb drives? I think there is a way to run the > OS from them so that the SD card gets minimal reads/writes because they do > not have any real mechanisms to balance writes across the media like some > thumb drives and SSD's do. > > On Saturday, 4 November 2017 09:17:40 UTC-4, Tom Keffer wrote: >> >> I've now had an Sandisk Extreme Plus SD card running on a Raspberry Pi >> B+ for nearly 3 years straight without a problem. >> >> http://www.threefools.org/weewx/status/index.html >> >> And, today marks one year of continuous uptime for weewx in this test! >> >> There are two conclusions to making these cards work: >> >> - Get a good one. I know it seem ironic to spend $30 on storage for a >> $35 computer, but it makes a big difference. >> - Use an Uninterruptible Power Supply (UPS). It doesn't have to be a >> very big one, but expect to spend another $50. >> >> So your $35 computer, once it's kitted out with a power supply, WiFi >> adapter, UPS, and memory card, is more like a $150 computer. >> >> But, the good news is that it's not necessary to buy a hard drive. >> >> Incidentally, in the one year that weewx has been up, it's memory usage >> has grown from VIRT 49.7MB to 52.7MB, RES from 32MB to 39MB. It has used >> almost 1136 hours of CPU time, for an average duty cycle of about 13%. >> >> -tk >> > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
