Dtrace and containers ported to Linux

[Lennart Sorensen]

On Wed, Jul 25, 2012 at 10:34:21PM -0400, William Muriithi wrote:
> Just noticed that it look like dtrace and containers will be part of
> Linux soon. We are too spoiled with choices may be ?
> 
> https://oss.oracle.com/ol6/docs/RELEASE-NOTES-UEK2-en.html#btrfs
> 
> Technology Preview Features
> 
> In addition to the features listed above, the Unbreakable Enterprise
> Kernel Release 2 includes the following features which are still under
> development, but are already made available for testing/evaluation
> purposes.
> 
> Kernel module signing facility: Applies cryptographic signature
> checking to modules on module load, checking the signature against a
> ring of public keys compiled into the kernel. GPG is used to do the
> cryptographic work and determines the format of the signature and key
> data.

Redhat has been doing that for years.  Or at least something similar.

> Linux Containers (lxc): Based on the Linux Cgroups and name spaces
> functionality, containers allow you to safely and securely run
> multiple applications or instances of an operating system on a single
> host without risking them interfering with each other. Containers are
> lightweight and resource-friendly, which saves both rack space and
> power. In order to get started with containers, you need to install
> the "lxc" package, which is included in the package repository of the
> Unbreakable Enterprise Kernel.

This has been around a while.  We use it on Debian already.

> Transcendent memory: Transcendent Memory (tmem for short) provides a
> new approach for improving the utilization of physical memory in a
> virtualized environment by claiming underutilized memory in a system
> and making it available where it is most needed. From the perspective
> of an operating system, tmem is fast pseudo-RAM of indeterminate and
> varying size that is useful primarily when real RAM is in short
> supply. To learn more about this technology and its use cases, see the
> Transcendent Memory project page on oss.oracle.com:
> http://oss.oracle.com/projects/tmem/

Interesting but complex idea it seems.

> DTrace: DTrace is a comprehensive dynamic tracing framework that was
> initially developed for the Oracle Solaris operating system; it is
> being ported to Linux by Oracle. DTrace provides a powerful
> infrastructure to permit administrators, developers, and service
> personnel to concisely answer arbitrary questions about the behavior
> of the operating system and user programs in real time. DTrace feature
> previews will be published as a separate set of kernel packages, it is
> not yet included in the regular Unbreakable Enterprise Kernel
> distribution.

I wonder what license it is under this time.

-- 
Len Sorensen
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