Date: Fri, 19 Feb 2010 21:07:25 +0100 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: freebsd-fs@FreeBSD.org Cc: freebsd-current@FreeBSD.org Subject: HAST (Highly Available Storage) now in HEAD. Message-ID: <20100219200725.GA1617@garage.freebsd.pl>
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--T4sUOijqQbZv57TR Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi. Yesterday I committed HAST to the HEAD branch. HAST allows to transparently store data on two physically separated machines connected over the TCP/IP network. HAST works in Primary-Secondary (Master-Backup, Master-Slave) configuration, which means that only one of the cluster nodes can be active at any given time. Only Primary node is able to handle I/O requests to HAST-managed devices. Currently HAST is limited to two cluster nodes in total. HAST operates on block level - it provides disk-like devices in /dev/hast/ directory for use by file systems and/or applications. Working on block level makes it transparent for file systems and applications. There in no difference between using HAST-provided device and raw disk, partition, etc. All of them are just regular GEOM providers in FreeBSD. For more information please consult hastd(8), hastctl(8) and hast.conf(5) manual pages, as well as: http://wiki.FreeBSD.org/HAST On the wiki page above you should find instructions how to initialize hast and integrate it with ucarp. Let me know (using freebsd-fs@FreeBSD.org mailing list) if you have and questions or comments. And last, but not least, I'd like to thank sponsorswho made this projects possible: The FreeBSD Foundation, http://www.freebsdfoundation.org OMCnet Internet Service GmbH, http://www.omc.net TransIP BV, http://www.transip.nl --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --T4sUOijqQbZv57TR Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (FreeBSD) iEYEARECAAYFAkt+73wACgkQForvXbEpPzQuTwCgnAXN3KLND3jHfHQeKZRTZq7P zXUAoNh46+aqQjk9prCIRtM0NzXj/Yzt =wjuQ -----END PGP SIGNATURE----- --T4sUOijqQbZv57TR--
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