We have an Oracle running on AIX 6.1, now there have an disk spaces issue and we found that we cannot perform to extend the logical volume. Could help to review and make some suggestions.
Status:
we already provisioned some disks to the host, new disks can be scan and add into the volume group, issue just happened during extend the logical volume.
we try to use chlv -x 72174 oravol used PP is 63984, new PP is 8190.
Is that related to the policy "striped" not "parallel"?
Thanks.
The new disks is hdiskpower33 and hdiskpower34
new disks added into the volume group, status as below
PP status
Last edited by rbatte1; 11-23-2016 at 11:00 AM..
Reason: Added ICODE tags
Please wrap all code, files, input & output/errors in CODE tags.
It makes it far easier to read and preserves multiple spaces for indenting or fixed-width data.
Last edited by rbatte1; 11-23-2016 at 11:01 AM..
Reason: Added CODE tags
we try this before, the result as below. I don't know why is said not enough on hdiskpower6, as we checked, hdiskpower6 don't have enough space. Can we force to extend the size on the new disks? both error message on using smitty and command line.
Last edited by rbatte1; 11-23-2016 at 11:02 AM..
Reason: Adding CODE tags into quote as I had adjusted the previous post.
Are these local disks or hardware protected in some way? (SAN provided, RAID device etc.)
The reason I ask is that you have a single copy of each PP. On real hardware you might lose the LV if any disk fails. If it is hardware protected, then you might be causing yourself an IO overhead by striping. I know it sounds counter-intuitive, but I've seen issues where spreading IO according to how the OS sees it can cause contention on the real disks when a SAN also spreads the IO. Bizarrely we improved IO when we tried to create hot-spots as the OS saw it because the SAN then really did spread the heavy IO properly.
Can you explain a little more about what hardware you have in play?
we dont have an
either to unterstand how it is organised ( mirror between to bays? etc... ) And I may be wrong as now I use only mirror pools
It looks like you are in morror and yes you added new disks but are they one in each mrirror copy etc...
If you are stripped with strict policy you are stuck...you will have to add as many disks it needs to respect the stripping policy, but one way perhaps to see if true would be to do a
as if the stripping is not strict, it will move blocks to unused disks and free the ones completely full, beware if this have never been done before ( running tht command...) it can take quite some time ( in hours...)
If it worked, you can try
and see if that works.. if so you are a happy guy...
I don't think that there are mirrors in play for this LV. On the lslv oravol we have LPs matching PPs and COPIES value of 1.
This could well be SAN provided, especially if it is Oracle RAC in play as suggested by these lines from the lsvg
I'm not sure if reorgvg will work in Enhanced-Capable or not. It might well be worth stopping all but one node of the cluster (assuming it is clustered)
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----------------------------------------------------------
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I have enough free space on the volume group for this extension
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Thanks
Scampi (1 Reply)