jm + virtualization   8

Top 5 ways to improve your AWS EC2 performance
A couple of bits of excellent advice from Datadog (although this may be a slightly old post, from Oct 2016):

1. Unpredictable EBS disk I/O performance. Note that gp2 volumes do not appear to need as much warmup or priming as before.

2. EC2 Instance ECU Mismatch and Stolen CPU. advice: use bigger instances

The other 3 ways are a little obvious by comparison, but worth bookmarking for those two anyway.
ops  ec2  performance  datadog  aws  ebs  stolen-cpu  virtualization  metrics  tips 
23 days ago by jm
What Color Is Your Xen?
What a mess.
What's faster: PV, HVM, HVM with PV drivers, PVHVM, or PVH? Cloud computing providers using Xen can offer different virtualization "modes", based on paravirtualization (PV), hardware virtual machine (HVM), or a hybrid of them. As a customer, you may be required to choose one of these. So, which one?
ec2  linux  performance  aws  ops  pv  hvm  xen  virtualization 
february 2015 by jm
Mesosphere · Docker on Mesos
This is cool. Deploy Docker container images onto a Mesos cluster: key point, in the description of the Redis example: 'there’s no need to install Redis or its supporting libraries on your Mesos hosts.'
mesos  docker  deployment  ops  images  virtualization  containers  linux 
september 2013 by jm
Docker: Git for deployment
Docker is to deployment as Git is to development.

Developers are able to leverage Git's performance and flexibility when building applications. Git encourages experiments and doesn't punish you when things go wrong: start your experiments in a branch, if things fall down, just git rebase or git reset. It's easy to start a branch and fast to push it.

Docker encourages experimentation for operations. Containers start quickly. Building images is a snap. Using another images as a base image is easy. Deploying whole images is fast, and last but not least, it's not painful to rollback.

Fast + flexible = deployments are about to become a lot more enjoyable.
docker  deployment  sysadmin  ops  devops  vms  vagrant  virtualization  containers  linux  git 
august 2013 by jm
Docker
'the Linux container engine'. I totally misunderstood what Docker was -- this is cool.
Heterogeneous payloads: Any combination of binaries, libraries, configuration files, scripts, virtualenvs, jars, gems, tarballs, you name it. No more juggling between domain-specific tools. Docker can deploy and run them all.

Any server: Docker can run on any x64 machine with a modern linux kernel - whether it's a laptop, a bare metal server or a VM. This makes it perfect for multi-cloud deployments.

Isolation: Docker isolates processes from each other and from the underlying host, using lightweight containers.

Repeatability: Because each container is isolated in its own filesystem, they behave the same regardless of where, when, and alongside what they run.
lxc  containers  virtualization  cloud  ops  linux  docker  deployment 
july 2013 by jm
Snabb Switch
an open source virtualized Ethernet networking stack.

I am developing Snabb Switch in response to several exciting trends:
x86 has risen to be a powerful networking platform.
Virtualization and SDN are pulling more networking into servers.
Optimized user-space software is out-performing kernel-space software.

Snabb Switch's simple and fast software-only data plane makes developing networking software easier than ever before.


Written in LuaJIT but aiming to be very fast. cool stuff, worth watching
sdn  software  networking  emulation  snabb-switch  luajit  lua  virtualization 
april 2013 by jm
How We Vagrant
the enStratus “solo installer”; what they use for one-box testing, staging, and customer stack deployment, using chef-solo and Vagrant
chef  virtualization  vagrant  chef-solo  deployment  enstratus  cluster  stack 
december 2012 by jm

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