Re: [Freeswitch-users] Alternative to directory lookup using mod_xml_curl

Cristian Talle Thu, 18 Sep 2008 15:52:25 -0700

I gave it a try though... and it works nicely (at least for directory entries for now). I've added 3 more commands to xml_curl: cache_on, cache_off and cache_delete_key.

- cache_on - enables caching: it will store in a switch_hash_t structure all xml strings returned by curl, using <username>@<realm> as a key (since we're talking directory only in this example). The same key is looked up every time the xml is requested for that user/realm and the code returns an xml structure created using switch_parse_xml_from_str().

- cache_off - switches back to the original behavior and clears the hash.

- cache_delete_key <key> - will invalidate the cache entry so that next time it is reloaded by curl.

considering a 500 bytes - 1K string for each profile, you can cache 10000 user profiles in ~10M (considering we're storing the char* s)
please see a sample console output,with a terminal registering every 25 seconds

============================================================================
[EMAIL PROTECTED]> 2008-09-18 18:26:19 [CONSOLE] mod_xml_curl.c:363 xml_url_fetch() XML response is in /tmp/d0c586a8-85d0-11dd-838c-5148f6e85b7b.tmp.xml

[EMAIL PROTECTED]> xml_curl cache_on
API CALL [xml_curl(cache_on)] output:
OK

[EMAIL PROTECTED]> 2008-09-18 18:26:44 [CONSOLE] mod_xml_curl.c:245 xml_url_fetch() Key is not in cache [[EMAIL PROTECTED]].
2008-09-18 18:26:45 [CONSOLE] mod_xml_curl.c:363 xml_url_fetch() XML response is in /tmp/e00c7ae0-85d0-11dd-838c-5148f6e85b7b.tmp.xml

2008-09-18 18:27:10 [CONSOLE] mod_xml_curl.c:231 xml_url_fetch() Using xml from cache: [EMAIL PROTECTED]
2008-09-18 18:27:35 [CONSOLE] mod_xml_curl.c:231 xml_url_fetch() Using xml from cache: [EMAIL PROTECTED]

[EMAIL PROTECTED]> xml_curl cache_delete_key [EMAIL PROTECTED]
2008-09-18 18:27:42 [NOTICE] mod_xml_curl.c:128 xml_curl_function() Removing value for [[EMAIL PROTECTED]]
API CALL [xml_curl(cache_delete_key [EMAIL PROTECTED])] output:
OK

2008-09-18 18:28:01 [CONSOLE] mod_xml_curl.c:245 xml_url_fetch() Key is not in cache [[EMAIL PROTECTED]].
2008-09-18 18:28:01 [CONSOLE] mod_xml_curl.c:363 xml_url_fetch() XML response is in /tmp/0d729f00-85d1-11dd-838c-5148f6e85b7b.tmp.xml

[EMAIL PROTECTED]> xml_curl cache_off
2008-09-18 18:28:07 [NOTICE] mod_xml_curl.c:102 xml_curl_function() cleaning up directory cache
API CALL [xml_curl(cache_off)] output:
OK
========================================================================

cristian

Anthony Minessale wrote:

if you say inhale the xml into memory and the sever goes haywire and sends you 2 gigs out output you are in for a treat.
if you can get enough call volume on one box where the disk i/o of xml_curl even shows up on the map in relation to all the rtp etc, we've won.

On Wed, Sep 17, 2008 at 6:00 PM, Cristian Talle <[EMAIL PROTECTED]> wrote:

less tickin keeps you breathin :) It'd be nice though if you could just
use xml_rpc to tell FS:

/xml_update <section> <tag> <tag_attr_name> <tag_attr_val>...,/

similar to xml_locate

Cristian

Brian West wrote:
> If you're that concerned with it.. move the tmp to a ramdisk ;) I
> thought modern hard drives could take a lickin and keep on tickin
>
> /b
>
> On Sep 17, 2008, at 5:51 PM, Cristian Talle wrote:
>
>
>> Oh, they are but it's still HDD... I wouldn't like to see the server
>> die
>> because of too much disk IO
>> I'm trying to figure out what's the most efficient way to handle
>> changes
>> in user profiles (and possibly dialplan, etc...) if order handle
>> thousands of users per server.
>>
>> Cristian
>>
>
>
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Re: [Freeswitch-users] Alternative to directory lookup using mod_xml_curl

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