Failed to open block-chain input file at blk00509.dat

[OPrtr]

Hello Jeff,

In case you would be willing to revisit this script and help out.

Ok, so this is where it stops: Scanned 410,224 block headers so far, 188 since last time. Found 410,224 block headers total. 0 in the last block. Finished scanning block headers. Built block-chain with 410202 blocks found..

Also it crashes somewhere around 320 000 blocks while processing statistics and I don't see it allocating more than 8Gb of memory at any point in the process.

Can you help? I could provide all the feedback you would need. After alot of research it seems that there is no longer a functional parser out there with the blockchain this big.

[jeffchan]

Sorry I’m not sure I can help :( I haven’t worked on this in quite awhile

[OPrtr]

Too bad, it seems to be the most efficient piece of code lying around. If you have a general idea as to where could I look please let know. It just crashes without any output.

Thanks anyway

[advanpix]

The cause is that code opens a lot of file handles (for each *.dat file) and keeps them open. C standard library has limit of 512 opened file handles. To solve this, change MAX_BLOCK_FILES to 8192 (in Blockchain.cpp) and call _setmaxstdio(8192) at the beginning of main function.

[advanpix]

Also change MAX_TOTAL_BLOCKS to 1000000 (in Blockchain.cpp) and call max_blocks 1000000 before calling scan command.

Note these values will change in future as blockchain grows. At the moment of this comment we have 707646 blocks.

[advanpix]

Overall, after spending few hours updating the code to make it work - my conclusion is the code is beyond repair. Don't waste you time and move on.