ctria.blogspot.com
ctria is blogging...: Could you please nslookup my CRL?
http://ctria.blogspot.com/2011/02/could-you-please-nslookup-my-crl.html
Tuesday, February 8, 2011. Could you please nslookup my CRL? How do you publish your CRLs? The common answer to this is via an http(s) URL or from an LDAP server. If you hosted a CA that serves Grid community you would find out soon that your CDPs are hit very hard. According to our logs we get more than 250 hits per minute in order to download a file sized in most of the times less than 100 KB. So yesterday on my way home i was thinking what if we host all the CRLs on a DNS server? Αναρτήθηκε από Christ...
ctria.blogspot.com
ctria is blogging...: A successful failure
http://ctria.blogspot.com/2012/03/successful-failure.html
Saturday, March 31, 2012. This post is about a really special failure that i had recently which i find as a success. About a month ago i had a totally unexpected contact from a nice guy from Mountain View. He send me an email telling me that he is part of Google Staffing team and asking me if i'm interested to join the Google.com Engineering team. It turned out to be my involvement to opensource projects especially about machine deployment (via quattor. And monitoring (via nagios. I'll be a googler!
ctria.blogspot.com
ctria is blogging...: July 2009
http://ctria.blogspot.com/2009_07_01_archive.html
Friday, July 17, 2009. Bye bye gLite 3.0. The last piece of gLite 3.0 node was decommissioned this week with the shutdown of node001.grid.auth.gr. This node was the sBDII/lcg-CE for GR-01-AUTH for long time now and was serving as Torque server for local PBS queues. A new node (XEN guest node with SL4-x86 64 and gLite 3.1) was setup in April to take over this task but the migration of the local users/queues was postponed till July. The node has already processed tens of thousands jobs. Kernel.sem = 250.
ctria.blogspot.com
ctria is blogging...: September 2009
http://ctria.blogspot.com/2009_09_01_archive.html
Tuesday, September 15, 2009. Hex-editing your GPFS Terabytes. I remember the old times where you could find a those geek guys that would use a hex editor to "patch" your favorite game and become bullet-proof or with 99.9 (still counting) lives or . do what ever you wanted in order to win. At that time i was sure that hex editors are powerful to save you from a "disaster" but i couldn't think what a disaster can be. Fortunately there IS a solution to this disaster. Although we couldn't find any offici...
ctria.blogspot.com
ctria is blogging...: June 2009
http://ctria.blogspot.com/2009_06_01_archive.html
Sunday, June 28, 2009. You can do the DB scheme work online! I'm working on a project with colleagues from other institutes. Within this project we decided to some work on a client-server model application with a database back-end. We had many mail exchanges, nice figures to describe workflows, phone meetings, video conference meetings but it was time to start doing some work. And it is open-source. Of course there is a demo installation. To use if you don't want to install it your self. Then i thought t...
pkoro.blogspot.com
/dev/random: September 2009
http://pkoro.blogspot.com/2009_09_01_archive.html
Monday, September 7, 2009. Resources on demand - close but not there yet. The outcome of this project was very successful. First of all, the reservation policies were quickly arranged by the Grid site administrators and secondly the overall calculations were completed more or less in time thus qualifying as predictions and not just calculations. Subscribe to: Posts (Atom). Resources on demand - close but not there yet. View my complete profile.
ctria.blogspot.com
ctria is blogging...: July 2011
http://ctria.blogspot.com/2011_07_01_archive.html
Monday, July 4, 2011. Developing the proper way. Recently i wanted to submit some patches to the Lustre Filesystem. To allow the compilation of the kernel modules (patchless client) for Fedora 14 kernels. I initially posted my patches to the discuss list but i was pointed to the company that maintains the community based Lustre fork ( whamcloud. First the code is publicly available on a git repo. People can clone the repository locally, do their modifications and they push them to Gerrit. Next week is of...
ctria.blogspot.com
ctria is blogging...: February 2011
http://ctria.blogspot.com/2011_02_01_archive.html
Tuesday, February 8, 2011. Could you please nslookup my CRL? How do you publish your CRLs? The common answer to this is via an http(s) URL or from an LDAP server. If you hosted a CA that serves Grid community you would find out soon that your CDPs are hit very hard. According to our logs we get more than 250 hits per minute in order to download a file sized in most of the times less than 100 KB. So yesterday on my way home i was thinking what if we host all the CRLs on a DNS server? Αναρτήθηκε από Christ...
ctria.blogspot.com
ctria is blogging...: Developing the proper way
http://ctria.blogspot.com/2011/07/developing-proper-way.html
Monday, July 4, 2011. Developing the proper way. Recently i wanted to submit some patches to the Lustre Filesystem. To allow the compilation of the kernel modules (patchless client) for Fedora 14 kernels. I initially posted my patches to the discuss list but i was pointed to the company that maintains the community based Lustre fork ( whamcloud. First the code is publicly available on a git repo. People can clone the repository locally, do their modifications and they push them to Gerrit. Next week is of...
ctria.blogspot.com
ctria is blogging...: June 2012
http://ctria.blogspot.com/2012_06_01_archive.html
Tuesday, June 26, 2012. People who know me probably know that when it comes to fabric management i'm a fan of Quattor. Quattor is a great tool that can manage nodes from installation part (utilizing pxeboot and kickstart) till fine-tuning service features. While Quattor is a strong tool that could help administering hundreds or even thousands of nodes, it has some weak spots which i'd like to get rid of:. Very steep learning curve. Use of a custom programming language ( PAN. I'm thinking of a solution wh...
