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syncvg purpose

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Mag0007

MIS
Feb 15, 2005
829
US
Other then mirroring when is a good time to syncvg?

I just moved a LV to another PV, is it a good idea to run syncvg vgname? BTW, this is not mirrors because its on a SAN

TIA!
 
Without mirroring, there's nothing for syncvg to sync, so it's pointless.





Rod Knowlton
IBM Certified Advanced Technical Expert pSeries and AIX 5L
CompTIA Linux+
CompTIA Security+

 
short and simple!

lsvg -l vgname
shows no mirroring. However a LV is spanned on 3 PVs

 
That's one of the advantages of LVM - an LV can span as many PVs as need be, but it does make it a bit trickier if you want to start mirroring after that.

So you might want to migratepv some stuff so that the LV's partitions are contained in fewer PVs.

Also, some planning ahead of LV/FS size may prevent the scattering of an LV's partitions...

On the other hand, for large LVs, it may be desirable to use as many PVs as possible (LV-striping) in order to use as many disk spindles as possible - even out the IO-load on as many disks as possible.


HTH,

p5wizard
 
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