PHP LsPCI and APC ? ==> PHP LSAPI and APC ?

[Monarobase]

+1 the scripts would be quite simple :
On user 1 :

PHP Code:

<?php
xcache_set("mona_test150112", 'This data was set by user 1', 120);
print('mona_test15112 was set by user 1 for 120 seconds');
?>

On user 2

PHP Code:

<?php
if (xcache_isset("mona_test150112"))
{
    print xcache_get("mona_test150112");
}
else
{
   print ('mona_test150112 is not set.');
}
?>

I haven't tested them as I don't have xcache yet

[NiteWave]

tested on our cPanel box, unfortunately, the issue exists.

add following code to print out current user id:

PHP Code:

$gid = `id`;
echo "<pre>gid=".$gid;
echo "</pre>"; 


restart lsws,
step 1: access http://www.lstest3.com/xcache.php

gid=uid=507(lstest3) gid=503(lstest3) groups=503(lstest3)

mona_test150112 is not set.

step 2: access http://www.lstest.com/xcache.php

gid=uid=504(lstestc) gid=501(lstestc) groups=501(lstestc)

mona_test15112 was set by user 1 for 120 seconds

step 3:access http://www.lstest3.com/xcache.php again:

gid=uid=507(lstest3) gid=503(lstest3) groups=503(lstest3)

This data was set by user 1

so test result: so far don't use variable cache in suExec daemon mode in shared hosting. opcode cache is ok.

it may not be difficult for xcache to add such feature: each user(by check php process's user id) to have its own name space to store variables. or may be it already has similar feature -- configurable, need read its manual first

[Monarobase]

Seems to be exactly the same issue with XCache as with APC.

I've seen some patches for Xcache 2 that say they do this but not for Xcache 3 or APC.

Do you know if it's possible to deactivate this function ?

[Monarobase]

Xcache 3 version says it has "namespace support" but I haven't found any documentation about this so I don't know if it works with gid's or not

[Monarobase]

Looks promissing in the xcache.ini for Xcache 3.0.1 :

; mode:0, const string specified by xcache.var_namespace
; mode:1, $_SERVER[xcache.var_namespace]
; mode:2, uid or gid (specified by xcache.var_namespace)
xcache.var_namespace_mode =    0
xcache.var_namespace =        ""

I presume we would use the following :

; mode:0, const string specified by xcache.var_namespace
; mode:1, $_SERVER[xcache.var_namespace]
; mode:2, uid or gid (specified by xcache.var_namespace)
xcache.var_namespace_mode =    2
xcache.var_namespace =        "gid"

Could you give it a go and see if it fixes the issue ?

[NiteWave]

hi, it took me much time to set up the test environment.

initially, same result as before -- but figured out it's because of xcache 2.0.1. it just ignore
xcache.var_namespace_mode = 2
xcache.var_namespace = "gid"

finally build latest php 5.4.11 + xcache 3.0.1, yes, just what we want!
in step 3, the output is

gid=uid=507(lstest3) gid=503(lstest3) groups=503(lstest3)

mona_test150112 is not set.

same as step 1.

this is a good news -- to summary in short:
lsphp5 suExec daemond + xcache 3.0.1, all users on a shared host can use opcode cache and variable cache in memory, and can't access each other's variables.
in php.ini, xcache.var_namespace_mode should set to 2:

; mode:0, const string specified by xcache.var_namespace
; mode:1, $_SERVER[xcache.var_namespace]
; mode:2, uid or gid (specified by xcache.var_namespace)
xcache.var_namespace_mode = 2
xcache.var_namespace = "gid"

[Monarobase]

Great, will be installing LiteSpeed + Xcache 3.0.1 soon (probably tomorrow).

Will be my first litespeed install, so I hope all goes well !