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Inadvisably small full node config

Disclaimer: As the subject implies, this is about an inadvisable config. The following is of zero practical use, but like cross-stitch, may be appealing to the random few people interested in such things. Opinions on the futility of this exercise can be considered already noted. Any suggestions to make this more ridiculously small are very welcome. Obviously I'm not running my primary wallet off of this config. It's just for fun.
TLDR: Wow look, my full node fit on a 0.5 CPU with 0.6 GB memory and 25 GB drive... yeah for me!

Background

I used to run a full node a good ways back, but stopped when the old 3rd string laptop I was using to run it was having drive issues. Still the early interest paid dividends as the price has gone exponential. Missing the good ol' days, I wanted to run another node, but really didn't want to do it on any of my work or lab units. My company took a hard stand years ago to prevent interns from mining on spare HW, so running even a full node on my corporate gear is kinda a capitol punishment. Round about this time, I got some spam for some free VPS service for a year. The promotion were really (I mean really wimpy VPSs). Crappy VPS + bitcoind performance tuning = my kind of waste of time.

Goal

My goal (perverse though it may be), is to get bitcoin or other forks running in very small VPSs. Maybe some of the tuning parameters could be used for a docker container or some whipy SOC. The system I was targeting has 0.5 CPU, 0.6 GB of memory and 25 GB of disk.

Observations

I found some interesting things out along the way that may be of interest to people tweeking bitcoind.

dbcache limits

Since I don't have the requisite memory required to run the node, I've limited memory using the dbcache parameter. Settings range from 100 to 150 depending on what other settings I have in place.

0.15.1 mallocs

I don't know what changed in 0.15.1 but it seems much more memory hungry than previous releases. Throughout the tuning process, I continually had either bitcoind quit due to memory allocation failures (logged in debug.log), or the kernel oom_killer take maters into its own hands (logged in /valog/syslog). This looks very similar to an issue that was logged against 0.14.0 that was patched in 0.14.1. My ultimate solution was to downgrade to 0.14.2 which seems to work great.

prune compromise

My initial thoughts were to use prune=550 to use the least amount of disk space possible. I found out that even on 0.14.2 this causes memory to fill up quick. I found making the pruning less aggressive with a setting of prune=10240 seems to be a good compromise for what I need done. This could possibly be an observation error, but the results seemed very reproducable.

blocksonly avoidance

I had thought to save some memory by using blocksonly. For some reason, on 0.14.2, this causes more problems than it solves. I had a hard time finding any config where blocksonly would work. Surprisingly, maxmempool=5 does effectively the same thing for the miserly cost of 5MiB of memory.

serial consoles

Seems ridiculous, but on my VPS, if bitcoind was running full speed, I would have a hard time connecting through SSH. There were other SSH clients and connection methods that seemed to work better. By far the quickest connections when under heavy utilization was to connect directly to serial ports. I wrote a small snippet to enable extended serial console on my systemd install.

canary log

Since logging into my system gobbles up memory, I wanted this config to be as low-touch as possible once in motion. After tooling up the serial ports, I found all the system log messages where peekable without logging into my VPS through my VPS provider. I wrote a small canary script to simply chirp to the serial port every 5 minutes to confirm that bitcoind was indeed alive and kicking.

Scripts

I made a few scripts during the process as the needs arose. They are very utilitarian, and could do with some major overhauls, but they did what I needed done at the time I needed it.
Scripts:

Final config

Here is my final config, that is still syncing, but seems to be stable on 0.14.2
/usbin/nice -n 15 bitcoind \ -dbcache=115 \ -prune=10240 \ -maxmempool=5 \ -daemon /usbin/nohup $HOME/canary.sh $1 300 $USER >/dev/null 2>/dev/null & cPid=$! sudo /usbin/renice -n -5 -p $cPid echo "Canary @ $cPid" 
Memory utilization while syncing seems to be at about 400MiB. Once I'm synced, I expect to retune for dbcache=60 and maxmempool=60.
Projected full blockchain sync completion in (gulp) 30 days. CPU utilization is currently reported between 30-60% but my provider offers boost periods where they unmeeter the VMs. I've gotten it up to 110% on their dashboard, for what its worth.
I'm well beyond the word limit so I'll drop off here, but I'll eventually put the snipits in a github repo in the near future.
PS If anyone knows of some free VPS or Docker hosting services, please chime in.
EDIT: s/VSP/VPS/g - lysdexia
submitted by brianddk to Bitcoin [link] [comments]

Inadvisably small full node config

Disclaimer: As the subject implies, this is about an inadvisable config. The following is of zero practical use, but like cross-stitch, may be appealing to the random few people interested in such things. Opinions on the futility of this exercise can be considered already noted. Any suggestions to make this more ridiculously small are very welcome. Obviously I'm not running my primary wallet off of this config. It's just for fun.
TLDR: Wow look, my full node fit on a 0.5 CPU with 0.6 GB memory and 25 GB drive... yeah for me!

Background

I used to run a full node a good ways back, but stopped when the old 3rd string laptop I was using to run it was having drive issues. Still the early interest paid dividends as the price has gone exponential. Missing the good ol' days, I wanted to run another node, but really didn't want to do it on any of my work or lab units. My company took a hard stand years ago to prevent interns from mining on spare HW, so running even a full node on my corporate gear is kinda a capitol punishment. Round about this time, I got some spam for some free VPS service for a year. The promotion were really (I mean really wimpy VPSs). Crappy VPS + bitcoind performance tuning = my kind of waste of time.

Goal

My goal (perverse though it may be), is to get bitcoin or other forks running in very small VPSs. Maybe some of the tuning parameters could be used for a docker container or some whipy SOC. The system I was targeting has 0.5 CPU, 0.6 GB of memory and 25 GB of disk.

Observations

I found some interesting things out along the way that may be of interest to people tweeking bitcoind.

dbcache limits

Since I don't have the requisite memory required to run the node, I've limited memory using the dbcache parameter. Settings range from 100 to 150 depending on what other settings I have in place.

0.15.1 mallocs

I don't know what changed in 0.15.1 but it seems much more memory hungry than previous releases. Throughout the tuning process, I continually had either bitcoind quit due to memory allocation failures (logged in debug.log), or the kernel oom_killer take maters into its own hands (logged in /valog/syslog). This looks very similar to an issue that was logged against 0.14.0 that was patched in 0.14.1. My ultimate solution was to downgrade to 0.14.2 which seems to work great.

prune compromise

My initial thoughts were to use prune=550 to use the least amount of disk space possible. I found out that even on 0.14.2 this causes memory to fill up quick. I found making the pruning less aggressive with a setting of prune=10240 seems to be a good compromise for what I need done. This could possibly be an observation error, but the results seemed very reproducable.

blocksonly avoidance

I had thought to save some memory by using blocksonly. For some reason, on 0.14.2, this causes more problems than it solves. I had a hard time finding any config where blocksonly would work. Surprisingly, maxmempool=5 does effectively the same thing for the miserly cost of 5MiB of memory.

serial consoles

Seems ridiculous, but on my VPS, if bitcoind was running full speed, I would have a hard time connecting through SSH. There were other SSH clients and connection methods that seemed to work better. By far the quickest connections when under heavy utilization was to connect directly to serial ports. I wrote a small snippet to enable extended serial console on my systemd install.

canary log

Since logging into my system gobbles up memory, I wanted this config to be as low-touch as possible once in motion. After tooling up the serial ports, I found all the system log messages where peekable without logging into my VPS through my VPS provider. I wrote a small canary script to simply chirp to the serial port every 5 minutes to confirm that bitcoind was indeed alive and kicking.

Scripts

I made a few scripts during the process as the needs arose. They are very utilitarian, and could do with some major overhauls, but they did what I needed done at the time I needed it.
Scripts:

Final config

Here is my final config, that is still syncing, but seems to be stable on 0.14.2
/usbin/nice -n 15 bitcoind \ -dbcache=115 \ -prune=10240 \ -maxmempool=5 \ -daemon /usbin/nohup $HOME/canary.sh $1 300 $USER >/dev/null 2>/dev/null & cPid=$! sudo /usbin/renice -n -5 -p $cPid echo "Canary @ $cPid" 
Memory utilization while syncing seems to be at about 400MiB. Once I'm synced, I expect to retune for dbcache=60 and maxmempool=60.
Projected full blockchain sync completion in (gulp) 30 days. CPU utilization is currently reported between 30-60% but my provider offers boost periods where they unmeeter the VMs. I've gotten it up to 110% on their dashboard, for what its worth.
I'm well beyond the word limit so I'll drop off here, but I'll eventually put the snipits in a github repo in the near future.
PS If anyone knows of some free VPS or Docker hosting services, please chime in.
EDIT: s/VSP/VPS/g - lysdexia
submitted by brianddk to BitcoinDiscussion [link] [comments]

test headers

Goal

My goal (perverse though it may be), is to get bitcoin or other forks running in very small VSPs. This isn't really for VSPs (though it may be), but is really for SOC or other mico compute environments. Ultimately this can be encapsulated into a minimalist docker container. The system I was targeting has 0.5 CPU, 0.6 GB of memory and 25 GB of disk.

Observations

I found some interesting things out along the way that may be of interest to people tweeking bitcoin.

dbcache limits

Since I don't have the requisite memory required to run the node, I've limited memory using the dbcache parameter. Settings range from 100 to 150 depending on what other settings I have in place.

0.15.1 mallocs

I don't know what changed in 0.15.1 but it seems much more memory hungry than previous releases. Throughout the tuning process, I continually had either bitcoind quit due to memory allocation failures (logged in debug.log), or simply terminated by the OS because it attempted a malloc when no pages where left (logged in /valog/syslog). This looks very similar to an issue tha twas logged against 0.14 that was patched in 0.14.1. My ultimate solution was to downgrade to 0.14.2 which seems to work great.

prune compromise

My initial thoughts were to use prune=550 to use the least amount of disk space possible. I found out that even on 0.14.2 this causes memory to fill up quick. I found making the pruning less agressive with a setting of prune=10240 seems to be a good compromise for what I need done.

blocksonly avoidance

I had thought to save some memory by using blocksonly. For some reason, on 0.14.2, this causes more problems than it solves. I had a hard time finding any config where blocksonly would work. Surprisingly, maxmempool=5 does effectively the same thing for the miserly cost of 5MiB of memory.

serial consoles

Seems rediculous, but on my VSP, if bitcoind was running full speed, I would have a hard time connecting through SSH. There were other SSH clients and connection methods that seemed to work better. By far the quickest connections when under heavy utilization was to connect directly to serial ports. I wrote a small snippet to enable extended serial consolse on my systemd install.

Scripts

I made a few scripts durring the process as the needs arose. They are very utilitarian, and could do with some major overhauls, but they did what I needed done at the time I needed it.
Scripts:
submitted by brianddk to sandboxtest [link] [comments]

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chart,.,bitcoin,.,value history,.,bitcoin,.,value gbp,.,bitcoin,.,vs ethereum,.,bitcoin,.,vs usd,.,bitcoin,.,volatility,.,bitcoin,.,vs litecoin,.,bitcoin,.,value 2010,.,bitcoin,.,vs gold,.,bitcoin,.,v litecoin,.,bitcoin,.,v dollar,.,bitcoin,.,v euro,.,bitcoin,.,v gold,.,bitcoin,.,v blockchain,.,bitcoin,.,v onecoin,.,bitcoin,.,hack v.2,.,bitcoin,.,worth,.,bitcoin,.,wiki,.,bitcoin,.,wallet uk,.,bitcoin,.,what is it,.,bitcoinwisdom,.,bitcoin,.,whitepaper,.,bitcoin,.,wallet online,.,bitcoin,.,wallet address,.,bitcoin,.,wallet download,.,bitcoin,.,miner.w,.,bitcoin,.,w polsce,.,bitcoiny w polsce,.,bitcoin,.,w niemczech,.,bitcoin,.,w chmurze,.,bitcoin,.,w żabce,.,bitcoin,.,w polsce legalny,.,bitcoin,.,w chinach,.,bitcoin,.,w prawie polskim,.,bitcoin,.,w górę,.,bitcoin,.,xe,.,bitcoin,.,xbt,.,bitcoin,.,xt,.,bitcoin,.,xbte,.,bitcoin,.,xapo,.,bitcoin,.,xrp,.,bitcoin,.,xt price,.,bitcoin,.,xpub,.,x,.,bitcoin,.,generator,.,bitcoin,.,yahoo finance,.,bitcoin,.,year chart,.,bitcoin,.,year,.,bitcoin,.,yield,.,bitcoin,.,ytd,.,bitcoin,.,yubikey,.,bitcoin,.,yoda,.,bitcoin,.,yahoo finance chart,.,ybitcoin,.,magazine,.,bitcoin,.,y control de cambio,.,y combinator,.,bitcoin,.,ecuador y,.,bitcoin,.,bitcoin,.,by paypal,.,bitcoin,.,y el lavado de dinero,.,bitcoin,.,y deep web,.,bitcoin,.,y lavado de dinero,.,bitcoin,.,y litecoin,.,bitcoin,.,and blockchain,.,bitcoin,.,zebra,.,bitcoin,.,zerohedge,.,bitcoin,.,zimbabwe,.,bitcoin,.,zar,.,bitcoin,.,zcash,.,bitcoin,.,zapwallettxes,.,bitcoin,.,zarabianie,.,bitcoin,.,zug,.,bitcoin,.,zero,.,bitcoin,.,zero confirmations,.,bitcoin,.,z value,.,titan z,.,bitcoin,.,mining,.,titan z,.,bitcoin,.,z cash,.,bitcoin,.,nvidia titan z,.,bitcoin,.,mining,.,nvidia titan z,.,bitcoin,.,nakup zlata z,.,bitcoini,.,sklep z,.,bitcoinami,.,trgovanje z,.,bitcoini,.,co z,.,bitcoinem,.,bitcoin,.,0 confirmations,.,bitcoin,.,0.1,.,bitcoin,.,0.1.0,.,bitcoin,.,0 active connections,.,bitcoin,.,0 transaction fee,.,bitcoin,.,0 fee,.,0.15,.,bitcoins,.,0 25,.,bitcoins,.,0.05,.,bitcoin,.,in euro,.,bitcoin,.,2.0,.,0.1,.,bitcoins,.,0.21,.,bitcoins,.,bitcoin,.,1st august,.,bitcoin,.,1 million,.,bitcoin,.,101,.,bitcoin,.,10 year chart,.,bitcoin,.,10000,.,bitcoin,.,148,.,,.,bitcoin,.,10 year prediction,.,bitcoin,.,100k,.,bitcoin,.,100 dollars,.,bitcoin,.,10 years ago,.,1,.,bitcoin,.,in gbp,.,1,.,bitcoin,.,in pounds,.,1,.,bitcoin,.,in £,.,1,.,bitcoin,.,to dollar,.,1,.,bitcoin,.,in inr,.,1,.,bitcoin,.,to euro,.,1,.,bitcoin,.,in gdp,.,1,.,bitcoin,.,in eur,.,1,.,bitcoin,.,to myr,.,1,.,bitcoin,.,in sterling,.,bitcoin,.,2010,.,bitcoin,.,2017,.,bitcoin,.,2020,.,bitcoin,.,2018,.,bitcoin,.,2009,.,bitcoin,.,2013,.,bitcoin,.,21 million,.,bitcoin,.,2012,.,bitcoin,.,2014,.,2,.,bitcoin,.,to usd,.,2,.,bitcoin,.,price,.,2,.,bitcoin,.,to inr,.,2,.,bitcoin,.,wallets,.,2,.,bitcoins to dollars,.,2,.,bitcoins free,.,2,.,bitcoins a month,.,2,.,bitcoin,.,qt,.,bitcoin,.,2 year chart,.,bitcoin,.,2 paypal,.,bitcoin,.,3000,.,bitcoin,.,31st july,.,bitcoin,.,3 confirmations,.,bitcoin,.,3.0,.,bitcoin,.,3 year chart,.,bitcoin,.,3 month chart,.,bitcoin,.,300,.,bitcoin,.,365 club,.,bitcoin,.,3000 usd,.,bitcoin,.,30 confirmations,.,3,.,bitcoins in gbp,.,3,.,bitcoins,.,3,.,bitcoins to usd,.,3,.,bitcoin,.,in euro,.,3,.,bitcoin,.,to eur,.,bitcoin,.,3 unlimited,.,bitcoin,.,3 day chart,.,bitcoin,.,3 address,.,bitcoin,.,4000,.,bitcoin,.,4chan,.,bitcoin,.,4 billion,.,bitcoin,.,401k,.,bitcoin,.,4 backpage,.,bitcoin,.,43,.,bitcoin,.,40000,.,bitcoin,.,4k,.,bitcoin,.,4 year chart,.,bitcoin,.,48,.,4,.,bitcoins,.,4,.,bitcoins to usd,.,4,.,bitcoins in gbp,.,4,.,bitcoin,.,to eur,.,bitcoins 4 backpage,.,bitcoin,.,4 igaming,.,bitcoin,.,4 u,.,bitcoin,.,4 november,.,bitcoin,.,4 cash,.,bitcoin,.,5 year chart,.,bitcoin,.,51 attack,.,bitcoin,.,500,.,bitcoin,.,5 year,.,bitcoin,.,500 000,.,bitcoin,.,5000,.,bitcoin,.,50000,.,bitcoin,.,5 year price,.,bitcoin,.,5 years ago,.,bitcoin,.,5 year forecast,.,5,.,bitcoins in pounds,.,5,.,bitcoins,.,5,.,bitcoins to usd,.,5,.,bitcoin,.,free,.,5,.,bitcoin,.,in euro,.,bitcoin,.,5 years,.,bitcoin,.,5 minutes,.,bitcoin,.,5 min,.,bitcoin,.,5 unlimited generator,.,bitcoin,.,666,.,bitcoin,.,6 months,.,bitcoin,.,6 confirmations,.,bitcoin,.,6 month chart,.,bitcoin,.,6000,.,bitcoin,.,60 minutes,.,bitcoin,.,6 confirmations time,.,bitcoin,.,6 month price,.,bitcoin,.,6 years ago,.,bitcoin,.,60 day chart,.,6,.,bitcoin,.,network confirmations,.,,.,
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The Ultimate Bitcoin (BTC) Review - Best Cryptocurrency to ... How to run Bitcoin-qt as a server with a configuration file (3 of 6) JSON RPC Calls with Bitcoin qt (4 of 6) Bitcoin-qt .NET - C# wrapper - how to use Communicate with Bitcoin-qt using C# - .NET (5 of 6)

Wie funktioniert die Bitcoin Code App? Für alle Finanzmärkte gelten komplexe mathematische Strukturen. Für die Anleger bedeutet das, dass es unmöglich ist, sämtliche möglichen Wahrscheinlichkeitsrechnung in ihre Handelsentscheidungen einfließen zu lassen.Sie müssen sich also diverse Statistiken und Charts zu Hilfe nehmen, welche ihnen beispielsweise der eigene Broker zur Verfügung stellt. Bitcoin Core (formerly Bitcoin-Qt) is the third Bitcoin client, developed by Wladimir van der Laan based on the original reference code by Satoshi Nakamoto. It has been bundled with bitcoind since version 0.5. Bitcoin-Qt has been rebranded to Bitcoin Core since version 0.9.0 .. Bitcoin Core can be used as a desktop client for regular payments or as a server utility for merchants and other ... Bitcoin Core ist ein gemeinschaftliches, freies Software-Projekt, veröffentlicht unter der MIT-Lizenz. Release-Signaturen überprüfen Download über Torrent Quelltext Versionshistorie anzeigen. Bitcoin Core Release Signierschlüssel v0.8.6 - 0.9.2.1 v0.9.3 - 0.10.2 v0.11.0+ Oder wählen Sie Ihr Betriebssystem . Windows exe - zip. Mac OS X dmg - tar.gz. Linux (tgz) 64 bit. ARM Linux 64 bit ... Official Website URL bit-qt.com. Benefits KOSTENLOSES Demo-Konto. Overall Score 4.9 . By Oliver on March 9th, 2020 in. Ist die BitQT App seriös? BitQT zählt zu den Apps, über die momentan das ganze Internet redet. Sie wurde entwickelt, um strategische Handelsentscheidungen auf Grundlage des steigenden und fallenden Bitcoin-Kurses zu treffen. Es wurde schon viel über BitQT erzählt, von ... Install Bitcoin-Qt Since version 0.9, Bitcoin-Qt was renamed to Bitcoin Core t o reduce confusion between Bitcoin-the-network and Bitcoin-the-software. Bitcoin Core is a full Bitcoin client. It is a thick client, meaning it requires the full blockchain (explained below) on local disk to operate and expose blockchain back to the network to help relay and verify transactions. Keep a copy (sync ...

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The Ultimate Bitcoin (BTC) Review - Best Cryptocurrency to ...

We cover chapter 3 of Andreas Antonopoulos' book Mastering Bitcoin. Featured are examples of bitcoin-cli commands, and simple Python scripts to interact with the bitcoin blockchain. Referenced links: How to run Bitcoin-qt as a server with a configuration file (3 of 6) The ultimate review of Bitcoin (BTC), the grandaddy of all the cryptocurrencies, based on 9 key metrics: Market Size, Supply & Demand Economics, Decentraliza... Programming Bitcoin-qt using the RPC api (1 of 6) - Duration: 3:17. Lars Holdgaard 4,609 views. 3:17. Bitcoin-QT wallet review - Duration: 8:53. Secure Your Wallet Recommended for you. 8:53 . Web ... Communicate with Bitcoin-qt using C# - .NET. Category Howto & Style; Show more Show less. Loading... Autoplay When autoplay is enabled, a suggested video will automatically play next. Up next What ...

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