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Re: Windows binaries 64bit for PHP [message #178085 is a reply to message #178083] Sat, 12 May 2012 15:04 Go to previous messageGo to previous message
Jerry Stuckle is currently offline  Jerry Stuckle
Messages: 2598
Registered: September 2010
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Senior Member
On 5/12/2012 8:42 AM, Shake wrote:
> I thought you don't understood.
>
> I would use the catalogue example:
>
> People visits this page to see the image catalogue. Search engines
> visits this page to index images.
>
> If nobody human or machine have entered to this page, there is no
> directy linked image nowhere.
>

The link is there, whether a human or machine has requested the page or
not. Links don't just magically appear!

Whether the link has been accessed or not is a different story - but
immaterial to whether it exists or not.

> So, at this point nobody knows any url to any image of this site. And
> there is no image that could be accessed.
>

Still doesn't make any difference whether someone knows about the image
or not.

> The only way to knwo about one of these images is when anyone enter the
> php page. And when this occurs, reescaling process will be done if
> necesary.
>

At additional overhead to the server. This overhead can be completely
eliminated by simply resizing the images offline.

> Never, any image will be directly delivered without previosly have been
> executed the php.
>

And once the images have been created offline, the server doesn't have
to execute ANY PHP to deliver the image.

> We have the image /catalogue/images/size_1/123213.jpg Original
> We have the image /catalogue/images/size_2/123213.jpg Scaled
> We have the image /catalogue/images/size_3/123213.jpg No Scaled.
>
> The catalogue was listed throught /catalogue/index.php that yesterday
> was modified using a new size fo thumbnails (size_3).
>
> The third size was created yesterday. Nobody knows his existence, there
> is no link to it in any web, search engine or human brain. So nobody
> could access. That is a lucky thing, because the image no exist.
>

If there is no link, then why would the image be created?

> When the first visit is done to the /catalogue/index.php the size_2
> images start to be generated. If the visit is from a search engine, then
> the new images are indexed and could be directly accessed.
>

And if the images are created offline, none of that needs to be done.
The images can be sent without any PHP involvement at all.

> so /catalogue/index.php is executed always previous to put on the net
> the existence of new images. Included if we have batch reescaled them.
> These images will not have internet existence never if the
> catalogue/index.php is not executed. with or without reescaling.
>

But if you're listing them in the catalog, then there is a link to them.

> And then, this mean that all the supossed overhead about executing PHP
> always happen even if you batched the process.
>

Sure, but the batch process is done on another machine, taking
unnecessary work off the server.

> And it's obvious. we are talking about web pages that are created with php.
>

Which has nothing to do with resizing of images. The page with the link
MAY be a PHP page. But it could also be a Perl page, a Python page, a
Ruby (on Rails) page or even static HTML.

> I worked for four years in a website for artists. Not the bigger company
> but with reasonable traffic, 8 millions page visits per month, por than
> 250.000 pages per day. And about 1 million image artwork. A lot of them
> of big resolucion.
>

8 million hits a month is a bit below average, but a lot more than most
of the people in this newsgroup work on.

> And in this company we fight against this problem. In some cases we
> decided to use batch process and in other cases we decided to do
> "on-the-fly".
>

Sure, doing the batch process means less work for the server.

> Big images requires watermarking and some other processes, too slow to
> do on-fly. The reescaling required 3 weeks to be done , using three 3
> computers.
>

You need to get some better computers. 1M images shouldn't take
anywhere near 9 computer weeks to do! But then maybe you're using
Windows, which has significant overhead. Of course you could also do it
in a compiled language like C, which will also tremendously speed up the
process (a C program to do something like this is pretty simple).

> Other times, for new set of small sizes, we used on the fly. withouth
> usign 404 to react to.
>

Good you're not using the 404. But it's still a lot of unnecessary
overhead.

How long would it take your 3 computers to resize all the images you're
currently doing on your server? You're dumping that amount of overhead
plus more on the server.

> Just first time any one enters a page that have new images, new images
> were generated. And never happened that any image have been accesses
> directly previous to its generation.
>

Which is putting unnecessary overhead on the server.

> The images are always served directly throught lighttp, the php necesary
> to generate images was always inside the php app that generate the web
> pages.
>
> Greetings
>
>

You still have significant overhead on the server. Plus now you've
added unnecessary complexity to your application.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex(at)attglobal(dot)net
==================

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