If you are thinking that is is dynamic content with query strings then it's not the case. the urls will look like a directory structured static content but the back-end app server will translate the url and fetch the appropriate content from the CMS (alfresco) On Thu, Apr 21, 2011 at 1:30 PM, Ron Wheeler <rwheeler@xxxxxxxxxxxxxxxxxxxxx> wrote: > If you google "squid dynamic content" you will find that by default squid > does not cache dynamic content. > If it did, it would be useless as a proxy server since that would make > almost all dynamic sites unusable. > > There are lots of instructions about how to trick squid into caching content > that it (and the web servers it proxies) think is dynamic but you know is > not. > Youtube videos is one example where the web server says the content is > dynamic but in fact humans know that it is not. > > I think that a simple test will allow you to see that your CMS content will > get handled correctly. > > What are you using for CMS servers? > Perhaps someone can give you first-hand experience or a web site to visit. > I have never had to do anything to Apache and Wordpress to get it to work > properly. > > Don't forget that Squid and the web server can talk to each other without > actually shipping content. The HTTP protocol has lots of different messages > that can be quickly exchanged to make decisions about whether squid actually > needs new content. > > > Ron > > > On 21/04/2011 12:31 PM, Jawahar Balakrishnan (JB) wrote: >> >> It is all dynamic content going forward >> >> scenarios where Âa cache flush would be required >> >> 1) an article is updated >> 2) category Âis updated with a list of articles. >> >> we syndicate content to abut 150 partner and will have same >> article/category with a different URL doesn't squid cache based on the >> url? >> >> when you update content on your cms - how does squid know to update it's >> cache? >> >> JB >> >> On Thu, Apr 21, 2011 at 12:10 PM, Ron Wheeler >> <rwheeler@xxxxxxxxxxxxxxxxxxxxx> Âwrote: >>> >>> Are you sure that you need to do this? >>> Squid should be able to tell the difference between static and dynamic >>> content. >>> >>> We have a dynamic JSR-168/268 portal based on Tomcat and Jetspeed sitting >>> behind Apache and Squid Âand we have never had to intervene with Squid >>> for 3 >>> years. >>> We also have lots of Wordpress CMS sites. >>> >>> The user gets the latest information on every page load regardless of the >>> URL being the same. >>> >>> What exactly would cause you to trigger a flush of the cache? >>> >>> Ron >>> >>> >>> On 21/04/2011 11:30 AM, Jawahar Balakrishnan (JB) wrote: >>>> >>>> I would rather not do a restart of anything unless absolutely required >>>> >>>> Here are the challenges we face >>>> >>>> 1) We are trying to deploy Suqid as a reverse-proxy in front of a CMS >>>> 2) We want to trying find a balance between Âkeeping the content fresh >>>> without affecting performance by frequently expiring content. >>>> >>>> Our current reverse proxy solution allow us to flush the entire cache >>>> without having to restart but in limited testing Squid seemed to >>>> perform much better and we would prefer to use Squid but still retain >>>> the functionality of being able to flush the entire cache periodically >>>> via cron or when in case of an emergency. >>>> >>>> Cache-control headers are fine and will work in case of limited number >>>> of objects. >>>> >>>> Thanks >>>> JB >>>> >>>> >>>> On Tue, Apr 19, 2011 at 7:27 PM, Amos Jeffries<squid3@xxxxxxxxxxxxx> >>>> Âwrote: >>>>> >>>>> On Tue, 19 Apr 2011 11:14:55 -0400, Jawahar Balakrishnan (JB) wrote: >>>>>> >>>>>> I am looking to deploy Squid as a reverse proxy and i had couple of >>>>>> questions. We currrently use Bluecoat and Sun Web proxy and i am able >>>>>> to do the following things >>>>>> >>>>>> 1) How would i flush objects from cache? >>>>> >>>>> The whole lot: >>>>> Âhttp://wiki.squid-cache.org/SquidFaq/ClearingTheCache >>>>> >>>>> or individually via: >>>>> ÂHTTP "PURGE" requests >>>>> ÂHTCP "CLR" requests >>>>> >>>>> Âsquidpurge tool commands. >>>>> >>>>> >>>>>> 2) Can i flush the entire cache without restarting Squid? >>>>> >>>>> Yes ... but it takes a LONG time to do N objects individually. >>>>> Restart without a cache to load takes milliseconds. >>>>> >>>>>> 3) Can i set the configuration to expire objects at a certain time >>>>>> every day regardless of when the object was cache during the previous >>>>>> 24 hours? >>>>> >>>>> Use of the Expiry and Cache-Control mechanisms properly can do just >>>>> about >>>>> anything. Correct use will make all proxies not just your reverse one >>>>> handle >>>>> the site fine and remove a lot of customer problems. >>>>> >>>>> Objects which arrive with header "Expires: XX" will expire at XX >>>>> timestamp >>>>> and be replaced on their next use. >>>>> >>>>> >>>>> >>>>> Amos >>>>> >>>>> >>> > >
