On Tue, 19 Apr 2011 19:11:31 -0700, Linda Walsh wrote:
Amos Jeffries wrote:
On Tue, 19 Apr 2011 13:31:38 -0700, Linda Walsh wrote:
Picture this: I (on a client sys) pull in a web page. At same
time
I get it, it's handed over to a separate process running on a
separate core
read -> copy to reader thread buffer -> copy to processing thread
buffer -> copy to result output buffer (maybe) -> coy to writer thread
buffer -> write.
2x slowdown *on top of* the above processing scan lags. This exact
case of multiple copying is one of two reasons we do not have
threading in Squid.
----
I think you are missing an important point (maybe?)
The current fetch would stay as is. I.e go str8 to client --
only after sent to client would a copy be sent off to the
'prefetcher', so at worst, prefetcher does it's scan and finds out
stuff is already
fetched by client-requests, but in best case, prefetcher would do
it's parsing before the client asked for the page-reqs and they
would,
theoretically, already be 'in process' of being fetched.
Ah. I see.
Anyway, just some wonderings...
What will it take for Sq3 to get to the feature level of Sq2
and allow,
What we are missing in a big way is store-URL and location-URL
re-writers.
===
I'm so out of it, I don't even know that terminology -- I could
'guess', like maybe 1) being rewriting the URL of content stored in
the cache to
be more easily reusable, and 2) same as 1, but hmmm...rewriting
requests from clients?... Ah heck...I'm probably writing out my toes
again...
(like speaking out some wrong orifice, but for writing v. speaking!
;-)).
You may be more familiar with the config directive names:
storeurl_rewrite_program and location_rewrite_program.
storeurl_* is the feature used to cache YouTube videos.
Oh well nevermind...my floor is covered with drippings from
overflowing plate.
**slog**
I've had a handful of people stick their hands up to do this over
the last year or two. Pointed them at the squid-2 patches which need
adjusting to compile and work in squid-3 code. Never to hear from them
again. :(
---
Sigh...probably mean well, but when they get in there, they find
they are way over their heads...or at least alot more work than they
thought it'd be... not that I don't run into that many times in
trying
to change something or other on OpnSrc sw...geez...
Hardly anything is just simple anymore...
My home network is held together with bailing wire and duct tape
and even then it's unstable in weird ways.
lol.
Amos
