Re: HW/SW for license server

[shimi]

2011/9/23 Valery Reznic valery_rez...@yahoo.com

 Hi, All.
 I think use following software for it

 1. CentOS 6
 2. Apache with mod_python
 3. Mysql



As usual I will suggest you use Nginx instead of Apache. Can't see a reason
to use Apache unless nginx can't do what you want. Nginx also supports
uWSGI[1] if you choose Python as your language.

As for where to get a servers, rumors has it that Linode gives nice VPSs, if
you go abroad... don't know about good hosting in Israel.

HTH,

-- Shimi

[1] http://wiki.nginx.org/HttpUwsgiModule
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Re: HW/SW for license server

[Yedidyah Bar-David]

On Fri, Sep 23, 2011 at 01:19:51AM -0700, Valery Reznic wrote:
 Hi, All.
 
 I need to setup license server and looking for advice what hardware/software 
 to use
 
 
 General schema is following:
 
 There are about 20K clients all of them periodically (let say once a week) 
 query license server for license via https
 
 I'll try my best to spread all those requests over the week, but in worse 
 case scenario all those 20K request can came during 1hour,
 spread relative evenly i.e about 6 request/sec
 
 When license server get request it query database ~20K records with 2-3 small 
 fields, generate license and return it to client.
 
 License generation is light - md5sum of the very small input ( few hundreds 
 bytes)
 
 I think use following software for it
 
 
 1. CentOS 6
 
 2. Apache with mod_python
 3. Mysql

Just a short note - make sure you configure mysql to do query caching.
google for 'mysql query cache'. It wasn't on by default in centos5, I
did not check 6 yet. It has, just as any cache, the potential to improve
performance dramatically.
-- 
Didi


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[HAIFUX LECTURE] Deconstructing Amazon EC2 Spot Instance Pricing by Orna Agmon Ben-Yehuda

[Eli Billauer]

On Monday, September 26th (TOMORROW), at 18:30, Haifux will gather to 
hear Orna Agmon Ben-Yehuda talk about



Deconstructing Amazon EC2 Spot Instance Pricing


Abstract


Cloud providers possessing large quantities of spare capacity must 
either incentivize clients to purchase it or suffer losses. Amazon is 
the first cloud provider to address this challenge, by allowing clients 
to bid on spare capacity and by granting resources to bidders while 
their bids exceed a periodically changing spot price. Amazon publicizes 
the spot price but does not disclose how it is determined.
By analyzing the spot price histories of Amazon's EC2 cloud, we reverse 
engineer how prices are set and construct a model that generates prices 
consistent with existing price traces. We find that prices are usually 
not market-driven as sometimes previously assumed. Rather, they are 
typically generated at random from within a tight price interval via a 
dynamic hidden reserve price. Our model could help clients make informed 
bids, cloud providers design profitable systems, and researchers design 
pricing algorithms.
Joint work with Muli Ben-Yehuda, Assaf Schuster, Dan Tsafrir: Technion 
CS Tech Report CS-2011-09 
http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-info.cgi/2011/CS/CS-2011-09. 




We meet in Taub (CS Faculty) building, room 6. For instructions see: 
http://www.haifux.org/where.html


Attendance is free, and you are all invited!


Future Haifux talks include:


10/10/2011 How to Participate in the Linux Kernel Development (and Why) 
by Baruch Siach


31/10/2011 Better Performance in Virtualization by Abel Gordon

14/11/2011 GPGPU - Motivation and Architecture by Ofer Rosenberg

28/11/2011 GPGPU - OpenCL by Ofer Rosenberg

12/12/2011 GPGPU - Case studies, Do's and Dont's by Ofer Rosenberg

26/12/2011 GPGPU - Tools and profiling for performance by Ofer Rosenberg




We are always interested in hearing your talks and ideas. If you wish to 
give a talk, hold a discussion, or just plan some event Haifux might be 
interested in, please contact us at webmas...@haifux.org


--
Web: http://www.billauer.co.il


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