RSA Lattice Siever (2.0)

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Gavin Shaw
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RSA Lattice Siever (2.0)

Post by Gavin Shaw » Wed Apr 21, 2010 1:09 am

Anything related to RSA Lattice Siever (2.0).

RSA Lattice Siever (2.0) Homepage

Description:
Rsa Lattice Siever is a research project that uses Internet-connected computers to help others factoring project such as mersenneforum or XYYXf achieve their academic goals. You can participate by downloading and running a free program on your computer.

Team attach: Calm Chaos
RSA Lattice Siever (2.0) - BoincStats

Gavin.
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Re: RSA Lattice Siever (2.0)

Post by Gavin Shaw » Wed Apr 21, 2010 1:10 am

20 Apr 2010:

Today an experimental work generator has been set up. It seems to work fine. The generator is a php script run from cron, that tries to keep a set of unsent work units ready for the clients. work generation is stopped when a predefined threshold is reached, this is a sort of feedback control :p .
New numbers are now managed automatically, while old ones are still managed by hand.
You can follow the crunching status on the crunching status page, which has been improved since the last news. Numbers come in a waiting queue, the ready-to-be-sieved numbers are then moved in the active queue, and an archive of completed numbers is kept in the third part of the page.
The next technical challenge now is post processing, to group result files in a single multigigabytes monster file, that is finally downloaded by volunteers with multi core, multi gigabytes RAM computers, for the final factorization steps. we must concatenate thousands of workunits in real time, ensuring they are properly compressed and valid before concatenation and deletion, or the whole file will become invalid. There are atomic operations involved, with failure recovery options if something goes wrong in the middle of the concatenation "transaction".

And if that wasn't enough, we have to manage the small server disk, ensuring there is enough work AND enough room on the server to handle the results!
This will ensure that you, our fellow researchers, do not stay without work for your silicon beasts, while reducing the burden for my fellow project manager, and for our beloved linear algebra volunteers.
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Re: RSA Lattice Siever (2.0)

Post by Gavin Shaw » Fri Jul 02, 2010 1:49 am

01 Jul 2010:

Hi folks,
The RSALS server hardware will be upgraded in the upcoming days.
No action will be required from you. What you will observe is that the server will seem to be down for a few hours, then up.
This message is there to tell you that this downtime is normal and under control.
RSALS has NOT gone :)
For those of you who are curious, the upgrade will happen in 4 phases.
the new server will be set up, including linux, apache, mysql, BOINC server software, etc. with a copy of the DB at that point. Problems will be checked, including the ones related to possible new DB structure, upgraded web pages and forums, etc. We will then check a BOINC client is able to crunch test workunits from this server. This step will not impact your participation in the project, since the old server will still be operating at that point.
Once we are sure that the new server seems to operate correctly, the current server will be stopped. At that point, you will not be able to fetch and push work. The latest snapshot of the database will then be migrated to the new server.
the boinc.unsads.com DNS records will be updated, which will take some hours to complete in all regions of the world.
Once DNS replication seems to be OK in some major countries, the new server will be started, and you will then be able to resume your participation. A few hours later, everything will be back to normal.
We will keep you updated through the project global emailing feature so that we're sure that you get the right information on time. We'll send you notices at the beginning and the completion of each step.
Feel free to comment, ask questions, we will reply ASAP on the progress.
Regards,
squalyl
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Re: RSA Lattice Siever (2.0)

Post by Gavin Shaw » Mon Jul 12, 2010 12:02 am

10 Jul 2010:

The server has currently a lot of uptime problems, sorry for that. This is unrelated to the planned upgrade.
I don't know the cause yet. I'm working with the provider to find the cause.
Thanks for your patience.
squalyl
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