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doc: update README

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Thomas Schoebel-Theuer 2013-01-29 22:28:21 +01:00
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README
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GPLed software AS IS, sponsored by 1&1 Internet AG (www.1und1.de).
Contact: tst@1und1.de
--------------------------------
Abstract:
MARS Light is almost a drop-in replacement for DRBD
(that is, block-level storage replication).
In contrast to plain DRBD, it works _asynchronously_ and over
arbitrary distances.
arbitrary distances. It uses very different technology under the
hood, similar to transaction logging of database systems.
Anytime consistency: on a secondary node, its version of the
block device is always consistent in itself, but may be outdated
(represent a former state from the primary side). Thanks to
incremental replication of the transaction logfiles, usually the
lag-behind will be only a few seconds, or parts of a second.
Application and replication are completely decoupled.
Networking problems (e.g. packet loss) have no
impact onto your application at the primary side.
WARNING! Current stage is BETA. Don't put productive data on it!