9185 Enable testing over NFS in ZFS performance tests

[jwk404]

Authored by: Ahmed Ghanem ahmedg@delphix.com
Reviewed by: Dan Kimmel dan.kimmel@delphix.com
Reviewed by: John Kennedy john.kennedy@delphix.com
Reviewed by: Kevin Greene kevin.greene@delphix.com

This change makes additions to the ZFS test suite that allows the
performance tests to run over NFS. The test is run and performance data
collected from the server side, while IO is generated on the NFS client.

This has been tested with Linux and illumos NFS clients.

[ahrens]

This repo will be archived in the coming week, and therefore this PR is being closed. Alternate processes for contributing ZFS changes (including those in open PR's) include following the illumos procedures, or opening a PR against ZFSonLinux.

The reasoning behind this are outlined in an email to the developer@open-zfs.org mailing list, which is reproduced below:

The OpenZFS code repository on github (http://github.com/openzfs/openzfs) is a clone of the illumos repo, with basically identical code. The OpenZFS repo made it easier to contribute ZFS code to illumos, by leveraging the github pull request and code review processes, and by automatically building illumos and running the ZFS Test Suite.

Unfortunately, the automated systems have atrophied and we lack the effort and interest to maintain it. Meanwhile, the illumos code review and contribution process has been working well for a lot of ZFS changes (notably including ports from Linux).

Since the utility of this repo has decreased, and the volunteer workforce isn't available to maintain it, we will be archiving http://github.com/openzfs/openzfs in the coming week. Thank you to everyone who helped maintain this infrastructure, and to those who leveraged it to contribute over 500 commits to ZFS on illumos! Alternate processes for contributing ZFS changes (including those in open PR's) include following the illumos procedures, or opening a PR against ZFSonLinux.

The OpenZFS github organization (http://github.com/openzfs) will continue to exist. I will make an announcement about its future role at the OpenZFS Developer Summit on Monday.

Let me know if you have any questions,
--matt