See http://tinyurl.com/5jwe3l , but here's the brief version:

      Basic, which can be modified by the owner of the calling process
      Privileged, which can be modified only by privileged (superuser) callers
      System, which is fixed for the duration of the operating system instance


On Tue, Sep 2, 2008 at 8:01 PM, Vincent Boisard <[EMAIL PROTECTED]> wrote:
> Thanks for your help,
>
> Comments below ...
>
> On 9/2/08, Jeff Victor <[EMAIL PROTECTED]> wrote:
>>
>> Hello Vincent,
>>
>> From your message, it appears that you do not need to use capped-cpu.
>> However, if you find that you have a need to use both, it will work,
>> although there is potential to confuse Solaris and/or yourself. For
>> example, what happens if you set cpu-shares so that a zone must get at
>> least 25% of 4 cores, but capped-cpu=0.5?  Further, setting a CPU cap
>> can prevent a zone from using CPU cycles that are otherwise unused.
>> Why waste your expensive CPU?
>>
>> You do want to ensure that each zone gets enough processing cycles to
>> accomplish its tasks. This can be achieved with cpu-shares.  You might
>> start by setting cpu-shares to 100 for the global zone, and 10 for
>> each of the non-global zones. If you find that the system is
>> frequently experiencing CPU contention, and one zone isn't getting
>> enough CPU time, just increase that zone's share quantity.
>>
>> You might want to give the VOIP zone 50 shares instead of 10 because
>> of the sensitivity to computational latency. Is the VOIP software
>> multi-threaded? If not, then it will never use more than 25-30% of the
>> CPU power of the system in any situation.
>
> How long does the system take to adjust when there is a contention? Is it
> noticeable ?
> However, I will follow your advice and experiment ...
>
>> It is important that the global zone gets all it needs. Otherwise you
>> may interfere with proper operation of key infrastructure components
>> like the paging daemon.
>
> I have noticed that prctl show 2 types for the cpu-shares: privileged (the
> one we set) and system (always max value ie 65K). What's the difference ?
>
>> Also, docs.sun.com says:
>> "The capped-cpu resource and the dedicated-cpu resource are
>> incompatible. The cpu-shares rctl and the dedicated-cpu resource are
>> incompatible."
>
> thanks again for your help,
>
> Vincent
>
>
>> On Tue, Sep 2, 2008 at 1:38 PM, Vincent Boisard <[EMAIL PROTECTED]>
>> wrote:
>> > hello,
>> >
>> > I am currently setting up a home server. It will be my main storage
>> > server,
>> > but I will also be consolidating other applications on it (voip server,
>> > video streaming, app server, ...)
>> > I plan to use a Quad-core processor (namely the Q6600) with 8GB of RAM.
>> >
>> > I have been reading all the docs I can find about resource management
>> > but
>> > there are still some areas unclear to me:
>> >
>> > - Can capped-cpu and cpu-share be used at the same time: It there is no
>> > contention Z1 use only 3 cpu and Z2 3 cpus max, but if there is
>> > contention
>> > have 75/25% sharing?
>> >
>> > - What is ZFS cpu usage ? (How much cpu should I reserve for the global
>> > zone
>> > ?)
>> >
>> > More specifically, my setup would be something like:
>> >
>> > Global zone:                ZFS storage, NFS and Samba servers
>> > VOIP Zone:                 SIP PBX : should always have enough
>> > processing
>> > power to handle a few calls (home setup)
>> > download zone:            handles all downloads (torrent /http). Low
>> > priority.
>> > Video streaming zone : use VLC to stream videos on the network (maybe
>> > later
>> > some VOD).
>> > Video encoding zone :  should use all available cpus but low priority
>> > Database Zone:           MySQl and/or Postgresql
>> > App Server Zone:        SAMP stack and/or Glassfish
>> >
>> > I do not expect high load on these zones (this is not a business
>> > production
>> > server, mainly a development environment and home application with few
>> > concurrent calls).
>> >
>> > I am a bit at a loss on how to implement this.
>> > Is FSS and cpu-shares enough ?
>> > Should I use resource pools ? dynamic resource pools ?
>> >

-- 
--JeffV
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