[libvirt] Cluster_size parameter issue on qcow2 image format

Pankaj Rawat pankaj.rawat at nechclst.in
Thu Feb 23 05:08:12 UTC 2012


 

I have been working o the qcow2 image format ,

I theory regarding  cluster size it is written that as the size of
cluster increase performance should increase.

 

But something surprising happen The performance is degrading as the size
of cluster increased from 64K to 1M  ( during expansion of qcow2 image)

 

can any one tell why ? 

 




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