Hello,

I'm on Linux. I was trying some ramdisk stuff, especially with BOINC/slots directory. I forgot that BOINC directory was mounted on ramdisk too. Unfortunately, there was a blackout and my UPS system malfunctioned, so I have lost the client_state XML files and BOINC has 0 tasks. Stderr are gone too. BOINC/projects was a directory stored on HDD instead.

Now I have 106 output files (1.2GB) theoretically ready to send, that I can't send back.
Is there a way to generate client_state.xml again? I was "studying" its XML structure and I found md5_cksum tag. So I guess that it would not work if I recover it manually because I have not got checksums!

Why do I have 128 tasks in progress? Because of an incoming challenge on BOINCstats. :)

This is my host: https://www.gpugrid.net/results.php?hostid=494430


Merry Christmas anyway!

I would say you are out of luck. The client_state is a very large file and the syntax for every task is required to be correct. One missed closing tag and you dump the whole thing. Every task has to have all its compute parameters listed. There is no way to recover that information from the project unless you go through a recover lost task procedure and that is only if the project has send lost tasks set. You could try to connect to the project again and try to get lost tasks to rebuild the client_state.

Hi Keith, I have a backup of a previous client_state.xml, when I have already attached GPUGRID, but I have not download any task.

I'm familiar with modifying client_state.xml, so I wouldn't worry so much.


Good new.

I found that I can generate missing md5_cksum values by the command "md5sum target_file".

I miss some other values like final_cpu_time, final_elapsed_time and stderr_out instead. I guess there isn't a check about this server-side, so I could write fictitious times.

I would give it a try. If it doesn't work...

You could try to connect to the project again and try to get lost tasks to rebuild the client_state.

Incredible, it worked, I recovered my tasks, but they were abandoned when I contacted project server. BOINC also continued to upload all the results though. I hope admins can figure out if server stored them or not.

It had been a huge work. It took me 4 hours of intensive work. I do not recommend to anybody, I just did it for fun.

I post my work so it could be useful for someone who wants to try in the future.


www.gpugrid.net directory content
https://pastebin.com/3sEqtB2Y


Bash files to print file (1), workunit(2), result(3) tags
1) https://pastebin.com/pxqZeMTC --> https://pastebin.com/b4v0iv1E
2) https://pastebin.com/CX8ixxyN --> https://pastebin.com/PK0DeYec
3) https://pastebin.com/0xvEmhMK --> https://pastebin.com/ajUeUdas


Then I properly pasted all these outputs in the client_state.xml.