Interesting, I'll poke through this. Thanks! Justin
-----Original Message----- From: C R Ritson [mailto:c.r.rit...@newcastle.ac.uk] Sent: Thursday, February 25, 2010 11:24 AM To: Justin Lloyd; Help-cfengine Subject: RE: Splaytime and hostname hashing A colleague, now retired, wrote the attached piece of python - clearly you would need to customise this as it does things with our domain name to get the correct string to hash. I hope this helps. Chris Ritson (Computing Officer and School Safety Officer) Room 707, Claremont Tower, EMAIL: c.r.rit...@ncl.ac.uk School of Computing Science, PHONE: +44 191 222 8175 Newcastle University, FAX : +44 191 222 8232 Newcastle upon Tyne, UK NE1 7RU. WEB : http://www.cs.ncl.ac.uk/ >-----Original Message----- >From: help-cfengine-boun...@cfengine.org [mailto:help-cfengine- >boun...@cfengine.org] On Behalf Of Justin Lloyd >Sent: 25 February 2010 16:51 >To: Help-cfengine >Subject: Splaytime and hostname hashing > >The documentation states that splaytime specifies an integer number of >minutes by which cf-execd's execution of cf-agent should be delayed. It >states the delay is between 0 and splaytime minutes, which to nitpick >should really read "0 to (splaytime * 60) seconds", since otherwise it >could be misinterpreted as meaning the delay would be an integer number >of minutes. > >Further, it mentions, basically in passing, that the specific delay for >a given host is based on the hash of that hostname (the algorithm for >which is in files_hashes.c, FWIW). Unless there's a way to do this that >I'm not seeing, I would be interested in being able to access and report >on hosts' hash values to see how well distributed they are. In other >words, if I have 1000 systems, I'd like to know the distribution of >their splaytimes to know how many systems will access policy servers, >etc. during an execution. This would be useful in tuning both splaytime >and the schedule variable in the executor control body, especially as an >environment grows. > >Has anyone done anything along these lines with existing information, or >is this something I should put in a ticket for? > >Thanks, >Justin > >-- >Justin C. Lloyd >Unix Infrastructure Engineer >DigitalGlobe, An Imaging and Information Company > > >This electronic communication and any attachments may contain >confidential and proprietary >information of DigitalGlobe, Inc. If you are not the intended recipient, >or an agent or employee >responsible for delivering this communication to the intended recipient, >or if you have received >this communication in error, please do not print, copy, retransmit, >disseminate or >otherwise use the information. Please indicate to the sender that you >have received this >communication in error, and delete the copy you received. DigitalGlobe >reserves the >right to monitor any electronic communication sent or received by its >employees, agents >or representatives. > >_______________________________________________ >Help-cfengine mailing list >Help-cfengine@cfengine.org >https://cfengine.org/mailman/listinfo/help-cfengine This electronic communication and any attachments may contain confidential and proprietary information of DigitalGlobe, Inc. If you are not the intended recipient, or an agent or employee responsible for delivering this communication to the intended recipient, or if you have received this communication in error, please do not print, copy, retransmit, disseminate or otherwise use the information. Please indicate to the sender that you have received this communication in error, and delete the copy you received. DigitalGlobe reserves the right to monitor any electronic communication sent or received by its employees, agents or representatives. _______________________________________________ Help-cfengine mailing list Help-cfengine@cfengine.org https://cfengine.org/mailman/listinfo/help-cfengine
