VOSS 3.145.01 - New in this release.

New in this release is buffered transaction logging, together with the
Continuation Transactions, Persistent ("Long") Continuation Transactions, Web
Rendezvous, MVRC & MVCC features already announced.

With the new buffered logging feature, a background log archive process
activates every (default) 1500 milliseconds, to archive the contents of the log
buffer file; this has increased the maximum commit rate to 40 transactions per
second on desktop hardware.

Rollforward recovery applies all log entries archived since creation of the
backup which is being rolled forward, followed by all well-formed log entries
readable from the log buffer file. If log buffer flushing is enabled then
recovery of all committed transactions is assured, though this reduces the
maximum commit rate to about 15 transactions per second on a typical IDE drive,
but is otherwise dependent on the behaviour of the particular disk drive on
power outage during a write append in the last sector of the buffer file, as
disks read and re-write whole sectors, even when the operating system has called
an appending write. (AFAIK it is not possible to control an IDE drive at a
sufficiently low level to allow implementation of ping-pong appends).

VOSS 3.145.01is available for download here http://voss.logicarts.com/downloads/
under the GPLv3 open source project licence, please mailto:mail@logicarts.com re
supported commercial licensing.

John Clapperton
Logic Arts Ltd
http://voss.logicarts.com