Bitcoin Forum
December 07, 2016, 06:27:07 PM *
News: Latest stable version of Bitcoin Core: 0.13.1  [Torrent].
 
   Home   Help Search Donate Login Register  
Pages: [1] 2 »  All
  Print  
Author Topic: Bitcoin slow to download the block chain?  (Read 17789 times)
realme
Jr. Member
*
Offline Offline

Activity: 44


View Profile
June 18, 2012, 12:01:52 PM
 #1

Hello,
 yet I am only allowed to ask in Newbies Forum. So I repost the question here.
Quote from: bionicghost
the block chain has been downloading at an excrucuatingly slow pace [about 1 block per 5 seconds].
https://bitcointalk.org/index.php?topic=67231.msg782085#msg782085
I have same problem as this user, but I get only [1 block per 18 seconds]!

Yes I have bitcoin-qt 0.6.2
Yes, I do prtforwarding 8333

1. Solve "You can download a premade blockchain + index, but that implies a certain amount of trust in the supplier of the files, as they are not verified as thoroughly that way."

But what is the cause of slowness?
What does it mean in the quoted thread above? "The slow part is not downloading the blockchain, it's verifying it and building a transaction index for it (the blkindex.dat file)."?

I have an Intel Core " Duo @2.40Ghz, 2 GB Ram". But I dont see any strange behaviour of  bitcoin-qt in Taskmanager CPU column!
1481135227
Hero Member
*
Offline Offline

Posts: 1481135227

View Profile Personal Message (Offline)

Ignore
1481135227
Reply with quote  #2

1481135227
Report to moderator
1481135227
Hero Member
*
Offline Offline

Posts: 1481135227

View Profile Personal Message (Offline)

Ignore
1481135227
Reply with quote  #2

1481135227
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
1481135227
Hero Member
*
Offline Offline

Posts: 1481135227

View Profile Personal Message (Offline)

Ignore
1481135227
Reply with quote  #2

1481135227
Report to moderator
1481135227
Hero Member
*
Offline Offline

Posts: 1481135227

View Profile Personal Message (Offline)

Ignore
1481135227
Reply with quote  #2

1481135227
Report to moderator
Newar
Legendary
*
Offline Offline

Activity: 1148


https://gliph.me/hUF


View Profile
June 18, 2012, 12:04:12 PM
 #2

You get it here: http://sourceforge.net/projects/bitcoin/files/Bitcoin/blockchain/

OTC rating | GPG keyid 1DC91318EE785FDE | Gliph: lightning bicycle tree music | Mycelium, a swift & secure Bitcoin client for Android | LocalBitcoins
realme
Jr. Member
*
Offline Offline

Activity: 44


View Profile
June 18, 2012, 12:10:30 PM
 #3

Thanks!
But that seems not what I need. It says "Who needs this? - Any first-time user of bitcoin, who wishes to avoid the lengthy block chain download through the p2p network."

I need a solution for daily use. I cant download the daily blockchains of a few hundred and spend hours of downloading while my computer is freezing.  Huh

Who knows: what is the cause of slowness?
Newar
Legendary
*
Offline Offline

Activity: 1148


https://gliph.me/hUF


View Profile
June 18, 2012, 12:32:55 PM
 #4

So did you download the whole block chain once already? You will not have to download it every day over and over again. It will just go and get the missing pieces since last program start.

And yes, it is a slow process, hence the file at soureforge.

OTC rating | GPG keyid 1DC91318EE785FDE | Gliph: lightning bicycle tree music | Mycelium, a swift & secure Bitcoin client for Android | LocalBitcoins
skrubis
Newbie
*
Offline Offline

Activity: 11



View Profile WWW
June 18, 2012, 12:58:28 PM
 #5

Mine took more than 4 days to sync with the network. It was mainly because I was unable to enable upnp or open the bitcoin port, so I was unable to connect to more that 8 nodes at a time.

You should:

1) open port 8333 on your router/firewall for TCP (or was it UDP)
2) if you are unable to do ^this, try connecting to any open wireless hotspot, I noticed that I was able to connect to much more nodes that way with a slow open wifi port and sync faster than using my own 200mbit optic cable that is crazy fast.

★★★★★KINLEAVES.COM - COOL VINYL SKINS FOR YOUR GADGETS FROM 1,5BTC - FREE SHIPPING WORLDWIDE★★★★★
StewieMcFluffy
Newbie
*
Offline Offline

Activity: 8



View Profile
June 18, 2012, 01:00:54 PM
 #6

Thanks!
But that seems not what I need. It says "Who needs this? - Any first-time user of bitcoin, who wishes to avoid the lengthy block chain download through the p2p network."

I need a solution for daily use. I cant download the daily blockchains of a few hundred and spend hours of downloading while my computer is freezing.  Huh

Who knows: what is the cause of slowness?
It will most likely take you a day or so to download most of the blockchain, if you decide not to use the sourceforge link or any pre-downloaded blockchain to get a head start.
How many blocks have you downloaded so far? Were currently on block 185132 at the moment
mollison
Full Member
***
Offline Offline

Activity: 157



View Profile
June 18, 2012, 01:48:24 PM
 #7

Are you using disk encryption? I've been told that can massively slow things down. Seems to be true from firsthand experience.
keverw
Member
**
Offline Offline

Activity: 75



View Profile WWW
June 21, 2012, 07:20:11 PM
 #8

Mine took like 20 hours. Didn't know they had pre downloaded block downloads. Will be helpful for next time I install Bitcoin, Like on my server!

Go open a whole new world with Visa Prepaid Bitcoin. More people go with, Visa Bitcoin.
Donate - BTC: 1DML4UTq8a2XunNFCU1jcvnGMLcDzti8xq - LTC: LTyS2SircbN9Qfrux1hcwWzpsUgg42mPBr - DOGE: DNmwq87fq4Q79wAcMxhirngaegpmPsHAw4 - MYR: MCgPG7sF5YcAubUifpjkuqUM8yAg52vEic
Gabi
Legendary
*
Offline Offline

Activity: 1050


View Profile
June 21, 2012, 07:42:01 PM
 #9

Quote
But what is the cause of slowness?
The epic usage of the hard disk by the client. It keep reading and verifying  each block wich cause epic hard disk usage wich is then the bottleneck
realme
Jr. Member
*
Offline Offline

Activity: 44


View Profile
July 01, 2012, 09:08:48 PM
 #10

Hello,

thanks for all your reply's.
But many of you didnt understand, what I was meaning (Maybe because my not native English?).
Its not about "using disk encryption", or "portforwarding 8333 on router/firewall"... I was connected > 20 nodes.

The problem is, if I have all actual blocks of e.g 187,086 today. In a few days I have do update the new blocks!
And e.g today (with bitcoin-0.6.3-win32) it tooks five hours to load/verifying  ca. 1200 blocks. In this time its not possible to use my Laptop for other work!

Quote
But what is the cause of slowness?
The epic usage of the hard disk by the client. It keep reading and verifying  each block wich cause epic hard disk usage wich is then the bottleneck
Ok, understand. Its really mainly the HDD?
But how do other people?  Huh BTC is not usable like it behaves on my laptop.
Its necessary to buy a very fast hard disk (SSD)? What HDD parameters do I need to load/verifying blocks faster?

Thank you.
Bitsky
Hero Member
*****
Offline Offline

Activity: 542


View Profile
July 01, 2012, 09:52:01 PM
 #11

There have been numerous reports about this problem lately, mainly since Satoshidice caused a spike in transactions. In my opinion, this is a real roadblock for new users, who usually don't want to invest the time it takes for the initial download. Defenders of the status quo will mention web-based wallets (which I don't trust), or other clients (where only Electrum seems to be the only choice (if you don't want Java)).

The main client needs to be optimized in that area (I/O and pruning). Currently, it's faster (for me) to download a snapshot and only verify the last missing blocks than letting the client take care of updating 3+ days; and I'm on a slow connection.

Bounty: Earn up to 68.7 BTC
Like my post? Feel free to drop a tip to 1BitskyZbfR4irjyXDaGAM2wYKQknwX36Y
zhitgeist
Newbie
*
Offline Offline

Activity: 26



View Profile
July 01, 2012, 10:01:57 PM
 #12

Yeah, it was very slow for me too. 15-20 hours or so.

COINO UcNTQT4o5ijDBraAbLXEQFzHZp33eGsPsR
DOGE DLwud3qi8aUd9YpAAZPKnF8FSdVB5C3ewK
zvs
Legendary
*
Offline Offline

Activity: 1386



View Profile WWW
July 01, 2012, 10:22:19 PM
 #13

it took less than 5hrs on my home computer, about 2 days on some crappy kimsufi, and about 15 hours on the hetzner ex 4

the entire block chain is like 2 gigs?

link speed was never an issue for me, just processing, near the end it slows to a crawl

oh, being able to use -connect to my home computer on the hetzner sped it up a lot, instead of getting all those 'such and such must have been sent to the wrong person' errors

you could try using bitcoind -connect=91.121.152.57

that's my kimsufi on celeron 1.2ghz, i think it can upload just fine though

Dacentec, best deals for US dedicated servers. They regularly restock $20-$25 Opterons with 8-16GB RAM & 2x1-2TB HDD's (ofc, usually lots of other good stuff to choose from).  I did a Serverbear benchmark of one of my $20/mo Opteron (June last year), it's here.  Have had about a half dozen different servers with Dacentec, & none have failed to sustain at least 40MB/s (burst higher). My favorite is a 12-month rent-to-own ZT Systems 2XL5520 16GB 2x2TB SATA for $40/month (got lucky with the 'off-brand', haven't seen a RTO 2xL5520 for under $50/mo since -- at least for monthly contracts).  wholesaleinternet.com has some ancient 2-core intel CPUs @ $10/mo sometimes (I got an Intel Core 2 6300 @ 1.86GHz, with a 250GB HDD with 46000 hours on it, LOL. $20 @ Dacentec is much better, if you can grab one). joesdatacenter.com (same location as Wholesale Internet) also occasionally has specials (or if you don't want to wait, it has an AMD Opteron 170 @ $16/mo).
casascius
Mike Caldwell
VIP
Legendary
*
Offline Offline

Activity: 1344


The Casascius 1oz 10BTC Silver Round (w/ Gold B)


View Profile WWW
July 01, 2012, 10:53:40 PM
 #14

This is a problem that will plague the main client for quite a while.  Its developers don't consider it a top issue that people have to wait forever to start using it - they presently have this idea that unless all of the calculations network-wide are repeated, anything less than that is trusting somebody and that trust could be exploited and so is unacceptable, so unacceptable that having new users wait hours is more acceptable.

Other clients start up with much less time, as they are "lite nodes".  But to the developers' credit (of the main client I mentioned first, not of the lite nodes), lite nodes are able to do this because of the environment provided by the nodes that took the time to at least acquire the whole block chain.  The network would not function if it consisted solely of lite nodes.

Meanwhile there are discussions on the forums going on right now, contemplating real good solutions to bridge the gap - how to engineer a client to not need to exhaustively verify the unabridged history of Bitcoin, but still to have it as a "full citizen" node that can sustain the network.  Those discussions look promising and may result in the emergence of a client with such capabilities, but the capabilities will really only mature when the community as a whole (users and developers) buy into the new ideas and either decide they are an acceptable tradeoff for security versus performance, or tweak the capabilities until they are.

tl;dr: The main client is going to continue to get slower and slower and slower for first startup - and downloading the pre-generated blockchain images is practically a must.  But there are real enough solutions to the problem that it will almost certainly be fixed long before the block chain file gets bigger than your hard drive!  The ultimate solution - new user running a client for the first time and needing no more than minutes to get a good sync on the Bitcoin network that is reliable enough to accurately accept all good payments and reject bogus ones - is well on the radar.  This is part of why Bitcoin is still experimental and the units of account (BTC) are still under $10 - a bargain for where I see the future of this going!

Companies claiming they got hacked and lost your coins sounds like fraud so perfect it could be called fashionable.  I never believe them.  If I ever experience the misfortune of a real intrusion, I declare I have been honest about the way I have managed the keys in Casascius Coins.  I maintain no ability to recover or reproduce the keys, not even under limitless duress or total intrusion.  Remember that trusting strangers with your coins without any recourse is, as a matter of principle, not a best practice.  Don't keep coins online. Use paper wallets instead.
Tony
Newbie
*
Offline Offline

Activity: 1


View Profile
July 03, 2012, 04:56:46 AM
 #15

It took me about 5 second to download 1 block too even though i've already predownloaded the block chain ( about 2.5GB ) i still need to synchronize my blockchain with the 5second perblock speed Sad
digimag
Full Member
***
Offline Offline

Activity: 138


View Profile
January 17, 2013, 05:41:18 PM
 #16

Hello,

I am upset by how long it takes to start using Bitcoin from scratch. It is taking more than 30 hours now, and the last 7 days are especially long to download.

I have a Macbook Air with SSD and a 10 Mbps up / 100 Mbps down of network bandwidth on optical fiber! And UPnP is working.

I don't see how waiting more than 24 hours to start can be considered as "normal" for any software. Huh

And this is almost unusable for anyone who doesn't run his computer 24H/24!

I understand the importance of having the entire blockchain, but can't we just start by downloading the most recent blocks, so we can start to use the software right away, and right after that download and process the rest in the background?

What happened to developers? Isn't this obvious?

17opQsbw8873x4PTwzvacEjNR2a59mSxoT
DannyHamilton
Legendary
*
Offline Offline

Activity: 1638



View Profile
January 17, 2013, 07:12:27 PM
 #17

I am upset by how long it takes to start using Bitcoin . . .

If all of this is an issue for you, why did you choose to use the Bitcoin-Qt client instead of one of the "light" clients such as Electrum, Multibit, or even a web wallet like blockchain.info?

. . . I understand the importance of having the entire blockchain, but can't we just start by downloading the most recent blocks, so we can start to use the software right away, and right after that download and process the rest in the background? . . .
Based on your question, I'd say that you don't understand the importance of having the entire blockchain.  The most recent blocks are useless unless you have the older blocks.  Everything in the bitcoin blockchain simply refers back to something previous until you get back to the coinbase transaction.  A recent block will have a bunch of transactions that claim to get their value from older transactions.  Without those older transactions, there is no way to determine if the transactions you are looking at in the current block are valid.

The "balance" in your wallet is simply the total of all the valid previous transactions from all the old blocks that have ever used your addresses in their output.  Without the old blocks, how will the client add up those transactions?


Welcome back to bitcointalk.org.  I see you haven't actively posted in 15 months.  A lot has happened since then. In particular the new 0.8.0 release of Bitcoin-Qt which is not quite yet ready will reduce some of the issues people have with the blockchain.

The quality of posts has dropped to such a low level that all users who are participating in a paid signature campaign are added to my ignore list. If you'd like a copy of the list to improve your browsing experience, you can find it here: https://bitcointalk.org/index.php?topic=973843.0 (Updated 2016-1-4)
Schabooza
Jr. Member
*
Offline Offline

Activity: 35


View Profile
January 17, 2013, 07:40:38 PM
 #18

I am upset by how long it takes to start using Bitcoin . . .

If all of this is an issue for you, why did you choose to use the Bitcoin-Qt client instead of one of the "light" clients such as Electrum, Multibit, or even a web wallet like blockchain.info?
Maybe the reason is the following sentences on Bitcoin.org
Quote
The original software written by Satoshi Nakamoto, the project's founder. If you aren't sure which program to pick, this is a good bet.
I think Newbies getting often trapped by that (like me too^^)

12G4Xa2ABvGicdQ7u1uL2m1PCtN88g5TAo
DannyHamilton
Legendary
*
Offline Offline

Activity: 1638



View Profile
January 17, 2013, 07:45:59 PM
 #19

I am upset by how long it takes to start using Bitcoin . . .

If all of this is an issue for you, why did you choose to use the Bitcoin-Qt client instead of one of the "light" clients such as Electrum, Multibit, or even a web wallet like blockchain.info?
Maybe the reason is the following sentences on Bitcoin.org
Quote
The original software written by Satoshi Nakamoto, the project's founder. If you aren't sure which program to pick, this is a good bet.
I think Newbies getting often trapped by that (like me too^^)
Yeah, I figure that is probably the reason.  My question was more of a rhetorical way of suggestion to try one of the other clients than a serious question as to why the Bitcoin-Qt client was chosen.

The quality of posts has dropped to such a low level that all users who are participating in a paid signature campaign are added to my ignore list. If you'd like a copy of the list to improve your browsing experience, you can find it here: https://bitcointalk.org/index.php?topic=973843.0 (Updated 2016-1-4)
Gabi
Legendary
*
Offline Offline

Activity: 1050


View Profile
January 17, 2013, 10:18:16 PM
 #20

Use a lightweight client like multibit

Yes it is very slow and yes it is a problem and that's why they are working on a new database system wich will make downloading the blocks much much faster.  This said, use lightweight clients
Pages: [1] 2 »  All
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!