mod_cache Google Group

Re: mod_cache doesn't cash?

ren...@renton.name (Alesha Vlasov) — Mon, 17 Nov 2008 16:57:05 UT

Thank you. Now it's clear.
But why should I check it everytime? If it is only 10 mins after
adding file to cache?

Hongyu:

Re: mod_cache doesn't cash?

shellc...@gmail.com (Hongyu) — Mon, 17 Nov 2008 15:53:14 UT

That's the difference between mod_cache with other cache servers(such as
squid). mod_cache doesn't provide final request handle for http, it depends
on other modules such as mod_proxy and mod_staticfile.
When modcache wants to check whether content is expired, it passes request
to mod_proxy and parses response of mod_proxy to update local cache file.

Re: mod_cache doesn't cash?

ren...@renton.name (Alesha Vlasov) — Mon, 17 Nov 2008 15:48:14 UT

Hongyu:

It is already set at 10 mins in my config.

I didn't understand, if I want to check whether the file in cache has
expired or not I should make GET request to backend?

Re: mod_cache doesn't cash?

shellc...@gmail.com (Hongyu) — Mon, 17 Nov 2008 01:16:23 UT

this line of cache.refresh-pattern
"\.(?i)(jpg|bmp|jpeg|gif|png)$ " => "10", # 5 munutes
set jpg/bmp/jpeg cache for only 10 minutes, so lighttpd has to check backend
server whether it's expired.

mod_cache doesn't cash?

ren...@renton.name (Alesha Vlasov) — Sun, 16 Nov 2008 18:49:38 UT

Hi.

I use lighttpd 1.4.19 and mod_cache 1.6.0.

My settings:

server.port = 81
server.modules = (
"mod_status",
"mod_proxy",
"mod_accesslog",
"mod_cache"
)

cache.debug = "enable"
cache.bases = ("/tmp/.lighttpd")
cache.support-queries = "enable"
cache.refresh-pattern = (

Re: HELP: cache repopulation under heavy load

shellc...@gmail.com (Hongyu) — Sat, 27 Sep 2008 14:11:20 UT

Modcache keeps list of urls which are handled to avoid serveral
connections writing to one cache file at the same time. That's the reason of
"somebody is handling /root/taxes/lighty/cache/
[link] now^M" in lighttpd error logfile

HELP: cache repopulation under heavy load

yarrumre...@gmail.com (Pete) — Sat, 27 Sep 2008 13:06:31 UT

I'm running a site that was recently slammed - 180,000 unique visitors
yesterday.

Lighty + mod_cache saved my pants! So thank you to everyone involved.

My setup is to have lighty in "front" of an apache based php site

I've noticed some behavior that stresses the system when a cached file

Re: patch for lighttpd 1.5.0 r2294 is available now

snail...@gmail.com (Snailfly. Yin) — Thu, 18 Sep 2008 07:38:57 UT

THX :P

Re: modcache 1.6.0 released

shellc...@gmail.com (Hongyu) — Sat, 13 Sep 2008 03:28:52 UT

1) You can use mod_mem_cache with mod_cache.
2) one metadata cache takes less than 512 bytes, 1M file metacache takes
less than 512M memory
2008/9/13 MaximeCD <Maxim...@gmail.com>

Re: Handling Vary: ?

maxim...@gmail.com (MaximeCD) — Sat, 13 Sep 2008 02:52:04 UT

Ok, it's stupid now that I know ModCache better :)

Contrary to squid, lighttpd can gzip files. So it's better to disable
gzip on backend servers, let ModCache store an uncompressed file, and
then let mod_compress compress the file + store a compressed copy.
Even better mod_compress can do bzip2 for Google Chromium.

Re: modcache 1.6.0 released

maxim...@gmail.com (MaximeCD) — Sat, 13 Sep 2008 02:46:46 UT

The answer is very simple, you just have to run a test server to see
it : the metadatas are stored on disk. But I discover that they are
also stored in memory. Does it mean that lighttpd memory consumption
will continue to grow with time and new files ? Or is there a limit of
metadata stored in memory ? (like mod_mem_cache has).

patch for lighttpd 1.5.0 r2294 is available now

shellc...@gmail.com (qhy) — Thu, 11 Sep 2008 10:41:35 UT

patch is [link]

patched tarball is [link]

please enjoy it

does mod_cache handle client request?

nkcheun...@gmail.com (fishman) — Wed, 03 Sep 2008 11:43:02 UT

hi all,
I am a newbie.
Can someone discribe the request data flow works.if use a backend
sever, proxy server using the mod_cache.
I can't find where read the cache file in the mod-cache's code, just
can find update header cache and cache file.
can someone tell me how it works.though I have read the page of

Re: Cache directory disk space growth

nkcheun...@gmail.com (fishman) — Tue, 02 Sep 2008 09:34:56 UT

endless..., it seemed i asked the same question yesterday.
can you tell me the difference among 'memcache'(header cache list),
'cache_save'(splay_tree) and 'range_request'(splay_tree), i read the
code, but can't understand the three datastructures.
thank you very much.

Re: modcache 1.6.0 released

nkcheun...@gmail.com (张宇) — Tue, 02 Sep 2008 07:28:47 UT

key = hash&(MEM_CACHE_NUM-1);
c = memcache+key;
you use 2^17 as mem-cache-num, is there any conflict of the key?the
update step may delete the useful header cache whose key is the same
as the newer, will it happen?
reboot the system, won't it re-init the memcache? and, the cache files
imformation won't lose?