Date: Tue, 29 Jan 2002 19:50:42 -0800
From: Murray Stokely <murray@FreeBSD.ORG>
I am very pleased to announce the availability of FreeBSD
4.5-RELEASE, the very latest release on the FreeBSD -STABLE branch of
development. Since FreeBSD 4.4 was released in September 2001, we
have made hundreds of fixes, updated many system components, made
several substantial performance improvements, and addressed a wide
variety of security issues.
In particular, there have been significant enhancements in the areas
of network communications and filesystems. FreeBSD 4.5 contains
improvements to the TCP stack to provide better throughput. In
addition, TCP performance is aided by larger default buffer sizes.
Finally, FreeBSD 4.5 contains new mechanisms to mitigate the effects
of TCP Denial of Service attacks.
The FFS filesystem benefits from a new directory layout strategy
that has demonstrated significantly better performance for operations
traversing large directory structures. Various bugs were located and
fixed in the FFS and NFS code with the help of a filesystem exercising
program originally developed at Apple Computer, Inc.
Those users doing fresh installations of FreeBSD should note some
changes for newly created filesystems, intended to improve the "out of
the box" performance of FreeBSD. In particular, sysinstall(
enables Soft Updates (a strategy for improving both performance and
reliability of on-disk data structures) for new filesystems it creates
and the newfs(
program will now, by default, create filesystems with
larger block sizes.
For more information about the most significant changes with this
release of FreeBSD, please see the release notes :