[Users] Re: I/O priorities question

[lst_hoe02 at kwsoft.de]

Zitat von Aleksandar Ivanisevic <aleksandar at ivanisevic.de>:

> lst_hoe02 at kwsoft.de writes:
>
>> Zitat von Aleksandar Ivanisevic <aleksandar at ivanisevic.de>:
>>
>>>
>>> Anyone?
>>>
>>> Aleksandar Ivanisevic
>>> <aleksandar at ivanisevic.de> writes:
>>>
>>>> http://wiki.openvz.org/I/O_priorities_for_containers
>>>>
>>>> What priority is the host node? How do those priorities relate to
>>>> ionice's priorities?
>>>>
>>>> My empirical research showed that even idle priority disk intensive
>>>> task in a HN saturates a IOPRIO=7 container. Is that right?
>>>>
>>
>> As far as i know the IOPRIO is only relevant for the container not for
>> the HN because the HN does all IO for the containers so there is no
>> useful setting for the HN anyway.
>
> I know that there is no setting, but what would be the I/O priority of
> the processes started in HN (VEID=0) in relation to the process
> started in VEID>0?

You should not start any "worker" process at the HN. The IO at the HN  
is not subject to any rate limit from the OpenVZ tools as far as i  
know. The IOPRIO for the container is used as relative value to divide  
the IO not consumed by the HN itself to the containers.

Regards

Andreas





-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 6046 bytes
Desc: S/MIME Cryptographic Signature
Url : http://openvz.org/pipermail/users/attachments/20101222/0e16d339/smime-0001.bin