What Are You Doing Right Now
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Working on various projects and documentation.
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HA - little victories I tell ya... thanks for being an ear for the talk out @scottalanmiller
Now running a Ham Radio APRS iGATE using the rPi3 and the neSDR SMArt - It's on the map! pretty cool,.. now - to build out the power for it for battery operations and to start working on it's portable twin
What is APRS:
Automatic Packet Reporting System (APRS) is an amateur radio-based system for real time digital communications of information of immediate value in the local area.[1] Data can include object Global Positioning System (GPS) coordinates, weather station telemetry, text messages, announcements, queries, and other telemetry. APRS data can be displayed on a map, which can show stations, objects, tracks of moving objects, weather stations, search and rescue data, and direction finding data.
APRS data are typically transmitted on a single shared frequency (depending on country) to be repeated locally by area relay stations (digipeaters) for widespread local consumption. In addition, all such data are typically ingested into the APRS Internet System (APRS-IS) via an Internet-connected receiver (IGate) and distributed globally for ubiquitous and immediate access.[2] Data shared via radio or Internet are collected by all users and can be combined with external map data to build a shared live view.
APRS has been developed since the late 1980s by Bob Bruninga, call sign WB4APR, currently a senior research engineer at the United States Naval Academy. He still maintains the main APRS Web site. The initialism "APRS" was derived from his call sign.
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@gjacobse said in What Are You Doing Right Now:
@tech1 said in What Are You Doing Right Now:
fighting with a printer
HAHAHA this made my day. Thank you.
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@gjacobse said in What Are You Doing Right Now:
HA - little victories I tell ya... thanks for being an ear for the talk out @scottalanmiller
Now running a Ham Radio APRS iGATE using the rPi3 and the neSDR SMArt - It's on the map! pretty cool,.. now - to build out the power for it for battery operations and to start working on it's portable twin
What is APRS:
Automatic Packet Reporting System (APRS) is an amateur radio-based system for real time digital communications of information of immediate value in the local area.[1] Data can include object Global Positioning System (GPS) coordinates, weather station telemetry, text messages, announcements, queries, and other telemetry. APRS data can be displayed on a map, which can show stations, objects, tracks of moving objects, weather stations, search and rescue data, and direction finding data.
APRS data are typically transmitted on a single shared frequency (depending on country) to be repeated locally by area relay stations (digipeaters) for widespread local consumption. In addition, all such data are typically ingested into the APRS Internet System (APRS-IS) via an Internet-connected receiver (IGate) and distributed globally for ubiquitous and immediate access.[2] Data shared via radio or Internet are collected by all users and can be combined with external map data to build a shared live view.
APRS has been developed since the late 1980s by Bob Bruninga, call sign WB4APR, currently a senior research engineer at the United States Naval Academy. He still maintains the main APRS Web site. The initialism "APRS" was derived from his call sign.
Awesome. Can you write up a how-to on this?
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@nerdydad said in What Are You Doing Right Now:
@gjacobse said in What Are You Doing Right Now:
HA - little victories I tell ya... thanks for being an ear for the talk out @scottalanmiller
Now running a Ham Radio APRS iGATE using the rPi3 and the neSDR SMArt - It's on the map! pretty cool,.. now - to build out the power for it for battery operations and to start working on it's portable twin
What is APRS:
Automatic Packet Reporting System (APRS) is an amateur radio-based system for real time digital communications of information of immediate value in the local area.[1] Data can include object Global Positioning System (GPS) coordinates, weather station telemetry, text messages, announcements, queries, and other telemetry. APRS data can be displayed on a map, which can show stations, objects, tracks of moving objects, weather stations, search and rescue data, and direction finding data.
APRS data are typically transmitted on a single shared frequency (depending on country) to be repeated locally by area relay stations (digipeaters) for widespread local consumption. In addition, all such data are typically ingested into the APRS Internet System (APRS-IS) via an Internet-connected receiver (IGate) and distributed globally for ubiquitous and immediate access.[2] Data shared via radio or Internet are collected by all users and can be combined with external map data to build a shared live view.
APRS has been developed since the late 1980s by Bob Bruninga, call sign WB4APR, currently a senior research engineer at the United States Naval Academy. He still maintains the main APRS Web site. The initialism "APRS" was derived from his call sign.
Awesome. Can you write up a how-to on this?
I can try - not the best in documentation.. but I've try to make notes as I have done this with what I have run into.. and I've run into another issue - but one which can be resolved... user needs permissions to write to the log dir, so got a access denied.
Another ham not to far off has his polling a Google Calendar for the beacon text... not sure on that yet.
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How much I love zsync. Wrote a client for our gaming community last year. Unlike rsync, there's no direct server connection beyond HTTP required.
Just synced 18.6 GB worth of updated files, took me three minutes and 20 seconds with 100 MBit downstream. Mostly disk-I/O.
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@thwr said in What Are You Doing Right Now:
How much I love zsync. Wrote a client for our gaming community last year. Unlike rsync, there's no direct server connection beyond HTTP required.
Just synced 18.6 GB worth of updated files, took me three minutes and 20 seconds with 100 MBit downstream. Mostly disk-I/O.
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Have not heard of zsync, that seems pretty useful.
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@scottalanmiller said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
How much I love zsync. Wrote a client for our gaming community last year. Unlike rsync, there's no direct server connection beyond HTTP required.
Just synced 18.6 GB worth of updated files, took me three minutes and 20 seconds with 100 MBit downstream. Mostly disk-I/O.
Awesome for syncing files because it only transmits changed blocks. It's much more efficient than expected, saving up to 95% traffic on our bills.
Already thought about building a .NET lib. There are only Java libs available. It's not that I dislike Java. No. I hate it.
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@reid-cooper said in What Are You Doing Right Now:
Have not heard of zsync, that seems pretty useful.
Actually it's used by some major Linux distros to sync ISOs between masters and mirrors.
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@reid-cooper said in What Are You Doing Right Now:
Have not heard of zsync, that seems pretty useful.
The basic idea is that you upload your files to your webserver and generate a data block map using zsyncmake. This must be repeated every time you update a file. That's all you need on the server side.
On the client, you just invoke zsync and point it to the zsync map files (which contains the block map and the relative or absolute URL to the real file). It then compares your local version and starts to sync changed blocks.
We are syncing nearly 60GB of mostly binary files (game mods) for more than 300 highly active users. Generating the map files and a lot of other stuff (like JSON listings and hashes) takes us about 10 minutes on an average SSD.
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@thwr said in What Are You Doing Right Now:
@scottalanmiller said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
How much I love zsync. Wrote a client for our gaming community last year. Unlike rsync, there's no direct server connection beyond HTTP required.
Just synced 18.6 GB worth of updated files, took me three minutes and 20 seconds with 100 MBit downstream. Mostly disk-I/O.
Awesome for syncing files because it only transmits changed blocks. It's much more efficient than expected, saving up to 95% traffic on our bills.
Already thought about building a .NET lib. There are only Java libs available. It's not that I dislike Java. No. I hate it.
It's rsync under the hood.
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@scottalanmiller said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
@scottalanmiller said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
How much I love zsync. Wrote a client for our gaming community last year. Unlike rsync, there's no direct server connection beyond HTTP required.
Just synced 18.6 GB worth of updated files, took me three minutes and 20 seconds with 100 MBit downstream. Mostly disk-I/O.
Awesome for syncing files because it only transmits changed blocks. It's much more efficient than expected, saving up to 95% traffic on our bills.
Already thought about building a .NET lib. There are only Java libs available. It's not that I dislike Java. No. I hate it.
It's rsync under the hood.
Same algorithm, yes.
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@thwr said in What Are You Doing Right Now:
@scottalanmiller said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
@scottalanmiller said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
How much I love zsync. Wrote a client for our gaming community last year. Unlike rsync, there's no direct server connection beyond HTTP required.
Just synced 18.6 GB worth of updated files, took me three minutes and 20 seconds with 100 MBit downstream. Mostly disk-I/O.
Awesome for syncing files because it only transmits changed blocks. It's much more efficient than expected, saving up to 95% traffic on our bills.
Already thought about building a .NET lib. There are only Java libs available. It's not that I dislike Java. No. I hate it.
It's rsync under the hood.
Same algorithm, yes.
That's what rsync is
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@scottalanmiller said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
@scottalanmiller said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
@scottalanmiller said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
How much I love zsync. Wrote a client for our gaming community last year. Unlike rsync, there's no direct server connection beyond HTTP required.
Just synced 18.6 GB worth of updated files, took me three minutes and 20 seconds with 100 MBit downstream. Mostly disk-I/O.
Awesome for syncing files because it only transmits changed blocks. It's much more efficient than expected, saving up to 95% traffic on our bills.
Already thought about building a .NET lib. There are only Java libs available. It's not that I dislike Java. No. I hate it.
It's rsync under the hood.
Same algorithm, yes.
That's what rsync is
There's a saying here... "Counting peas?"
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I did it again. I ended up using
ctrl+shift+vin Windows. -
@thwr said in What Are You Doing Right Now:
@reid-cooper said in What Are You Doing Right Now:
Have not heard of zsync, that seems pretty useful.
The basic idea is that you upload your files to your webserver and generate a data block map using zsyncmake. This must be repeated every time you update a file. That's all you need on the server side.
On the client, you just invoke zsync and point it to the zsync map files (which contains the block map and the relative or absolute URL to the real file). It then compares your local version and starts to sync changed blocks.
We are syncing nearly 60GB of mostly binary files (game mods) for more than 300 highly active users. Generating the map files and a lot of other stuff (like JSON listings and hashes) takes us about 10 minutes on an average SSD.
Are they authenticating somehow? Or does it just point to the directory?
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@coliver said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
@reid-cooper said in What Are You Doing Right Now:
Have not heard of zsync, that seems pretty useful.
The basic idea is that you upload your files to your webserver and generate a data block map using zsyncmake. This must be repeated every time you update a file. That's all you need on the server side.
On the client, you just invoke zsync and point it to the zsync map files (which contains the block map and the relative or absolute URL to the real file). It then compares your local version and starts to sync changed blocks.
We are syncing nearly 60GB of mostly binary files (game mods) for more than 300 highly active users. Generating the map files and a lot of other stuff (like JSON listings and hashes) takes us about 10 minutes on an average SSD.
Are they authenticating somehow? Or does it just point to the directory?
It's plain HTTP, so whatever your webserver can do.
There's only one downside: No HTTPS support. I do not like the idea, but that's another story. You can work around by many means: SSH port forwarding or VPN tunnels, for example.
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@thwr said in What Are You Doing Right Now:
@coliver said in What Are You Doing Right Now:
@thwr said in What Are You Doing Right Now:
@reid-cooper said in What Are You Doing Right Now:
Have not heard of zsync, that seems pretty useful.
The basic idea is that you upload your files to your webserver and generate a data block map using zsyncmake. This must be repeated every time you update a file. That's all you need on the server side.
On the client, you just invoke zsync and point it to the zsync map files (which contains the block map and the relative or absolute URL to the real file). It then compares your local version and starts to sync changed blocks.
We are syncing nearly 60GB of mostly binary files (game mods) for more than 300 highly active users. Generating the map files and a lot of other stuff (like JSON listings and hashes) takes us about 10 minutes on an average SSD.
Are they authenticating somehow? Or does it just point to the directory?
It's plain HTTP, so whatever your webserver can do.
There's only one downside: No HTTPS support. I do not like the idea, but that's another story. You can work around by many means: SSH port forwarding or VPN tunnels, for example.
I did a small workaround, as our content (mods) is not confidential. A script puts rolling credentials into the .htaccess-file of the webservers directory, keeping only the newest X entries. Invoked via cron. A serverside webservice provides the credentials to authenticated clients. So even if someone sniffes users and passwords (both random), he could only use them for a short amount of time.
Not ideal, but like I said, it's not required to be secure. Just a small barrier.
