Re: sessions
* [EMAIL PROTECTED] (Jeff Pang) wrote: On Mon, Aug 25, 2008 at 2:06 AM, Lars Haugseth [EMAIL PROTECTED] wrote: Another solution, which is not really what the OP was asking about, but probably fixes his problem, is to ensure that each request from the same client will always be sent to the same webserver (based on a hashing of the client's IP address, for example.) But client's IP can be changed from day to day, especially for the dialup clients. Changes from one day to another shouldn't be a problem, as long as it doesn't change in the middle of a session. Certain load balancing systems can be configured to direct one client to the same host on subsequent requests. The one we're using does this through cookies issued by the load balancer. -- Lars Haugseth If anyone disagrees with anything I say, I am quite prepared not only to retract it, but also to deny under oath that I ever said it. -Tom Lehrer -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
Re: sessions
On Sun, 24 Aug 2008, Lars Haugseth wrote: =* [EMAIL PROTECTED] (David Dorward) wrote: = = JuneEarth wrote: = How to make CGI sessions to be shared among multi-webservers? Thanks. = = They have to use a shared data store for the session information. Using = a database for that would be one approach. = =Another solution, which is not really what the OP was asking about, but =probably fixes his problem, is to ensure that each request from the same =client will always be sent to the same webserver (based on a hashing of =the client's IP address, for example.) = = Unfortunately using sticky sessions puts a site in the categories of Does not scale, Unreliable, and We have many frustrated users. David's earlier response for a shared data store for session information (via database). Search for distributed sessions on your favorite search engine. -- - Dwalu .peace -- I am an important person in this world - Now is the most important time in my life - My mistakes are my best teachers - So I will be fearless. - Student Creed -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
Re: sessions
* [EMAIL PROTECTED] (David Dorward) wrote: JuneEarth wrote: How to make CGI sessions to be shared among multi-webservers? Thanks. They have to use a shared data store for the session information. Using a database for that would be one approach. Another solution, which is not really what the OP was asking about, but probably fixes his problem, is to ensure that each request from the same client will always be sent to the same webserver (based on a hashing of the client's IP address, for example.) -- Lars Haugseth If anyone disagrees with anything I say, I am quite prepared not only to retract it, but also to deny under oath that I ever said it. -Tom Lehrer -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
Re: sessions
Another solution, which is not really what the OP was asking about, but probably fixes his problem, is to ensure that each request from the same client will always be sent to the same webserver (based on a hashing of the client's IP address, for example.) But client's IP can be changed from day to day, especially for the dialup clients. Or in the case of broadband users from request-to-request. I've been in six different major cities here, and in every one, the cable company gives you an RFC-1918 addresses and run a cadre of proxy servers. Where I am now, to get a real IP address from Megacable would cost me 70EUR per month above and beyond the regular price. Imagine a million users behind a block of 48 IP addresses. --L -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
Re: sessions
JuneEarth wrote: How to make CGI sessions to be shared among multi-webservers? Thanks. They have to use a shared data store for the session information. Using a database for that would be one approach. -- David Dorward http://dorward.me.uk/ -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
Re: sessions
On Sat, Aug 23, 2008 at 2:52 AM, JuneEarth [EMAIL PROTECTED] wrote: How to make CGI sessions to be shared among multi-webservers? Thanks. The simplest way is to use a transactional database system. You read the session from the database and write back to the database. It will work with as many webservers as you have (with some very high limits, of course). There are multiple perl modules that implement sessions this way. Also, most of the CGI frameworks use something along these lines as well. Sean -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
