Is it known and/or expected that nfs:/// repos perform *much* worse than http:// repos?

As an example, I have two images that I started to update at the same time. The repo is in SCA, the images are in BRM. I thought that NFS may be the cause of the horrible performance so I hit ^C in one of them. Then I started up a couple pkg.depotd processes for the on-nightly and on-extra repos in SCA, changed the publisher settings on one of the images to use http URIs, and restarted the operation (pkg change-variant variant.debug.osnet=true).

The change-variant operation on the image using http repos finished 17 minutes ago. The one using an NFS repo is still plodding along. The http operation needed to transfer 116 MB, the NFS operation needed to transfer 105 MB.

Any idea what's behind this?

--
Mike Gerdts
Solaris Core OS / Zones                 http://blogs.oracle.com/zoneszone/

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