The open source version of Varnish Cache 4.1x is no longer supported. For existing Varnish customers using Varnish Enterprise this is not an issue. For many open source Varnish Cache users this won’t be a surprise, and you will already have updated. The important point is that continued use of Varnish Cache 4.1 means that you will be going it alone. But you don’t have to.
Savvy consumers know that shopping for bargains is a year-round endeavor. And e-commerce companies who have orchestrated major shopping events throughout the year, rather than relying on the be-all, end-all nature of the traditional Black Friday shopping period in the US, are finding ways to lure in revenue at typically lean times of year. What began as primarily American with the post-Thanksgiving holiday chaos of Black Friday has crept into not only a longer shopping period, extending across the entire weekend after Thanksgiving (and sometimes earlier), but has ballooned globally, with retailers worldwide latching onto the Black Friday sales theme to promote pre-holiday shopping.
One of the most common - and ongoing - challenges companies face is making sure their content is delivered the way they want it to be - fast and reliably. And the thing is: there is no one-size-fits-all way that fits all companies. Everyone is keen first and foremost to achieve top performance: fast, smooth, reliable delivery under any conditions - that is, whether there is an unforeseen flood of traffic, and even if your website is completely down - a company still wants their visitors and customers to see something. Performance is the starting point - a constant and something that can always be improved.