[pLog-svn] website

Andy Wright andy at extracted.org
Wed Oct 15 01:26:16 EDT 2008 

On Wed, 2008-10-15 at 00:47 -0400, Jon Daley wrote:
> 	I have played around with squid some - it is hard to get right on 
> a dynamic site.  I haven't found that the search engines care much about 
> the crawl delay directive??
>  	Opinions on eaccelerator vs. apc? (Is that one of those 
> which-distribution-of-linux-do-you-like-best sort of questions?)
> 

eaccelerator uses these options to store keys, content, and even
sessions:

"shm_and_disk" - cache data in shared memory and on disk (default value)
"shm"          - cache data in shared memory or on disk if shared memory
                 is full or data size greater then eaccelerator.shm_max"
"shm_only"     - cache data in shared memory
"disk_only"    - cache data on disk
"none"         - don't cache data

It really is a personal preference.  I have not found xcache appealing,
with the very small amount of time I have used it.

I have not dug much into apc, or if it supports the caching above, but I
-think- they can work in conjunction.

>  	deflate compresses html and text on the way out?  Do you notice an 
> increased CPU load?  For me, bandwidth is generally cheaper than CPU 
> power.
>  	The mod_expires is interesting - I do see browsers requesting 
> stuff more than I think they should, though for lifetype - the primary 
> issue is the actual php pages, by spammers and search engines.
> 

For all my applications, even with the exception for need with lifetype,
I handle expiration with a cron job.. probably not the best way to
handle this - lighttpd also has a similar module.  So if the last access
was an hour or so ago, it gets purged based on ctime and mtime.  It can
be adjusted to need.

Again, it is personal choice, and what works and does the job.

> 
> On Wed, 15 Oct 2008, Mark Wu wrote:
> > 1. APC for php for opcode cache
> > 2. mod_expires, mod_deflate for apache for reduce the bandwidth
> > 3. mod_cache for apache for cache the images/scripts in each web server to
> > reduce NFS I/O (if you use multple server for load balance, it is very
> > useful)
> >
> > And, maybe you can add an Nginx or Squid server for reverse proxy, it might
> > help, too.
> >
> > If you want to lowering the indexing frequency of seach engine, maybe you
> > can try
> > http://en.wikipedia.org/wiki/Robots_Exclusion_Standard#Crawl-delay_directive
> >
> > Mark
> >
> > -----Original Message-----
> > From: plog-svn-bounces at devel.lifetype.net
> > [mailto:plog-svn-bounces at devel.lifetype.net] On Behalf Of Jon Daley
> > Sent: Wednesday, October 15, 2008 11:26 AM
> > To: LifeType Developer List
> > Subject: Re: [pLog-svn] website
> >
> > 	Ok, thanks, it is probably worth another try then.  I tried it
> > probably 8 or 12 months ago.
> >
> > On Tue, 14 Oct 2008, Andy Wright wrote:
> >
> >>> 	The last time I tried the accelerators, I had some trouble with the
> >>> code not executing accurately.
> >>
> >> I had trouble with many scripts up until the last few minor versions.
> >> Now, absolutely everything works absolutely wonderful with eaccelerator.
> >>
> >> At that time I was using a lighttpd module called htscanner which
> >> allowed lighttpd to parse .htaccess files (even though it is not
> >> supported as native on the web server) and send a PHP option to the
> >> opcode cacher to disable it on a per directory or hierarchical
> >> filesystem basis.
> >>
> >> It is a rather new technique to the PHP world, still, and it has come
> >> a long way since the last time you have likely tried using it.
> >>
> >> Andy
> >>
> >>> On Tue, 14 Oct 2008, Andy Wright wrote:
> >>>
> >>>> Could you compress output using the PHP option for scripts, cache
> >>>> static files on the webserver side + compression, fast-cgi for PHP?
> >>>>
> >>>> I have found eaccelerator does for me exactly what you are asking for.
> >>>> It is an opcode cacher that I use with fast-cgi and lighttpd..  if
> >>>> you are using fast-cgi, make sure to only spawn one process, and any
> >>>> number of children.
> >>>>
> >>>> It will use PHP output in a compiled state to execute phpbb, send it
> >>>> to your webserver which could compress the html output to the
> >>>> client, and serve other static files not provided by the PHP process
> >>>> in a compressed and cached state..
> >>>>
> >>>> might help...
> >>>>
> >>>> Andy
> >>>>
> >>>> http://myspew.com
> >>>>
> >>>> --
> >>>>
> >>>> On Tue, 2008-10-14 at 16:40 -0400, Jon Daley wrote:
> >>>>> I wrote the below email this morning, but didn't send it due to
> >>>>> being stressed about the server being down.
> >>>>>
> >>>>> I am now back in Pittsburgh, and the machine appears to be fine, as
> >>>>> long as I leave the lifetype sites turned off.
> >>>>>
> >>>>> I wonder if there is a known vulnerability in phpbb or something
> >>>>> that someone is exploiting?  I don't know how one would get a
> >>>>> complete server crash without any logs or anything from a php
> >>>>> process, remotely - maybe the site has been hacked?  I haven't looked
> > through the files yet.
> >>>>>
> >>>>> If anyone else has time(Reto?), that would be great.
> >>>>>
> >>>>> ---------------------------------
> >>>>>
> >>>>>  	Search engines have taken down the server a couple times in the
> >>>>> last week.  I am traveling today, and had to take lifetype.net
> >>>>> down, as I can't have it killing everything else.
> >>>>>  	I talked to an employee of Google, and I gather that the search
> >>>>> engines are trying to be more aggressive in having the most
> >>>>> up-to-date content, thus causing them to grab data continuously
> > throughout the day.
> >>>>> MSN is the worst offender, but some of the little unknown search
> >>>>> engines are causing trouble too.
> >>>>>  	We'll probably need to find some caching or something.  If anyone
> >>>>> has time to look up some caching for phpbb3, that would be great.
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>> _______________________________________________
> >>>> pLog-svn mailing list
> >>>> pLog-svn at devel.lifetype.net
> >>>> http://limedaley.com/mailman/listinfo/plog-svn
> >>>>
> >>>
> >>
> >> _______________________________________________
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> >>
> >
> > --
> > Jon Daley
> > http://jon.limedaley.com
> > ~~
> > Before you criticize someone, you should walk a mile in their shoes.
> > That way, when you criticize them,
> >   you're a mile away and you have their shoes.
> > _______________________________________________
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> >
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> >
>

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