On Fri, Mar 12, 2010 at 4:09 AM, Balbir Singh <[email protected]> wrote:
> On Fri, Mar 12, 2010 at 12:32 PM, Rafael Tinoco
> <[email protected]> wrote:
>> I'll be participating on this list. Just subscribed. Thanks for the
>> quick answer.
>>
>> I have lots and lots of web servers (4000 almost). Just started on
>> this hosting company.
>> I was a Sun employee and worked with Solaris 10 resource manager for
>> years (well since the beginning).
>>
>> The situation is the following:
>>
>> - We are using several mods for apache, migrating from user "httpd" to
>> the user id based on vhosts.
>> - When migration, the libcg daemon is listening to the netlink events
>> (new procs) and changing them to their cgroup
>>
>> (Unfortunately the httpd thread itself cannot start with the user id,
>> but Ive separated the httpd for some cpus, and after getting the user
>> id (with SUPHP, or fastcgi for example) (setuid maybe ?) they are
>> moving to the right cpuset)
>>
>
> Not sure I understand what you say here? You extract the userid on
> behalf of whom each httpd thread/process is running?
Yep, lots of apache modules can "change" the process id based on
vhosts configured for apache user.
>
>> Im migration all "users" on their own cgroup (inside several cpusets),
>> confining them on 1 or 2 cpus. (having 10 groups of 1 cpu each)
>>
>> Why create one cgroup for each user ? Im worried about "confining" 1
>> fake node memory block per cpuset and limiting users (all user
>> processes) to a maximum of 512M of ram.
>>
>> Any better way of doing this ?
>
> Have you considered the cgroups CPU and Memory controller? We also
> have block I/O and network controller in place.
Example:
group webserver/grupo7/testeemailgb7 {
perm {
task {
uid = testeemailgb7;
gid = testeemailgb7;
}
admin {
uid = root;
gid = root;
}
}
cpuset {
cpuset.cpus = 8;
cpuset.mems = 8;
cpuset.sched_load_balance = 0;
}
cpu {
cpu.shares = 256;
}
memory {
memory.soft_limit_in_bytes = 134217728;
memory.limit_in_bytes = 268435456;
memory.memsw.limit_in_bytes = 104857600;
}
}
>
> Balbir
>
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------------------------------------------------------------------------------
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Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
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