Commit Graph

5 Commits

Author SHA1 Message Date
Pawel Jakub Dawidek
adf8002bac Use PJDLOG_ASSERT() and PJDLOG_ABORT() everywhere instead of assert().
MFC after:	3 days
2011-09-27 08:50:37 +00:00
Mikolaj Golub
aa64b2f494 Make activemap_write_start/complete check the keepdirty list, when
stating if we need to update activemap on disk. This makes keepdirty
serve its purpose -- to reduce number of metadata updates.

Discussed with:	pjd
Approved by:	pjd (mentor)
2011-06-28 20:57:54 +00:00
Mikolaj Golub
47f1eb5c4b Fix a typo in comments.
Approved by:	pjd (mentor)
MFC after:	3 days
2011-04-10 15:11:19 +00:00
Pawel Jakub Dawidek
cd72d521e3 White space cleanups.
MFC after:	1 week
2011-03-22 10:39:34 +00:00
Pawel Jakub Dawidek
32115b105a Please welcome HAST - Highly Avalable Storage.
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.

Sponsored by:	FreeBSD Foundation
Sponsored by:	OMCnet Internet Service GmbH
Sponsored by:	TransIP BV
2010-02-18 23:16:19 +00:00