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ionice on AIX

Hi, simple question..

is there ionice or similar command on AIX?

I want to give priority to process to access to disks on AIX. I've used ionice on DomU's on linux. I need it now for AIX.

Thanks
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sminfo
Asked:
sminfo
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1 Solution
 
woolmilkporcCommented:
Hi,

AIX has the regular commands nice and renice, but not ionice.

See "man nice" and "man renice"

You can tuneI/O on AIX in general using the "ioo" command, but not on a per-process basis.

Here is an informative article about AIX's process priority and control:

http://www.ibm.com/developerworks/aix/library/au-aixprocesscontrol/index.html

If you really need to fine-tune single processes consider using the AIX Workload Manager.

Here is more:

http://www.redbooks.ibm.com/abstracts/sg245977.html

wmp



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sminfoAuthor Commented:
Hi wmp,

I just want to run an mksysb on an old Power server and I want not to use the whole IO. It's a shame, I thought there was ionice similar cmd on AIX. Any idea on how to run my mksysb?
Thanks.
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sminfoAuthor Commented:
How can I see the nice's priority of process with ps command?
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sminfoAuthor Commented:
Opss. ps -elf ... sorry! :-)
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woolmilkporcCommented:
Yes, "ps -elf", the "NI" column ...

or "ps -eo user,pid,nice,args"  (more output fields if needed).

As for the mksysb - nice should have some influence on I/O behaviour, but creating a WLM class is the most effective (and sophisticated) way here.

Start with "smitty wlmaddclass", then continue with "smitty wlmclass_bio" for your new class, fine-tune with "smitty wlmclass_proclimit", finally create a rule to assign mksysb to this class with "smitty crewlmrs".

Have fun - learning a new feature is always a challenge (will keep you agile ...)

Just joking: wmp

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sminfoAuthor Commented:
Thanks wmp  :-)
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