Added the Mesos 1.6.0 release blog post.

Review: https://reviews.apache.org/r/67193/


Project: http://git-wip-us.apache.org/repos/asf/mesos/repo
Commit: http://git-wip-us.apache.org/repos/asf/mesos/commit/a3dbfc31
Tree: http://git-wip-us.apache.org/repos/asf/mesos/tree/a3dbfc31
Diff: http://git-wip-us.apache.org/repos/asf/mesos/diff/a3dbfc31

Branch: refs/heads/1.6.x
Commit: a3dbfc31bd3ad5ce4de260ccd7adc0a202a7d231
Parents: 0da5aa5
Author: Greg Mann <g...@mesosphere.io>
Authored: Thu May 17 15:53:20 2018 -0700
Committer: Greg Mann <gregorywm...@gmail.com>
Committed: Thu May 17 15:59:24 2018 -0700

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 .../blog/2018-05-17-mesos-1-6-0-released.md     | 56 ++++++++++++++++++++
 1 file changed, 56 insertions(+)
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http://git-wip-us.apache.org/repos/asf/mesos/blob/a3dbfc31/site/source/blog/2018-05-17-mesos-1-6-0-released.md
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+---
+layout: post
+title: "Mesos 1.6: Persistent Volume, Scheduler API, and Docker Support 
Improvements"
+published: true
+post_author:
+  display_name: Greg Mann
+  gravatar: 20c5c9695f0891b6b093704331238133
+  twitter: greggomann
+tags: Storage, Docker, Performance
+---
+
+Great work everyone; Apache Mesos 1.6.0 was released on May 11!
+
+# New Features and Improvements
+
+Mesos 1.6 includes improvements to persistent volumes, usability of the 
scheduler API, Docker daemon support, and memory allocation performance.
+
+## Resizing Persistent Volumes
+
+Mesos 1.6 adds experimental support for the [resizing of persistent 
volumes](http://mesos.apache.org/documentation/latest/persistent-volume/). Two 
new operations, 
[GrowVolume](http://mesos.apache.org/documentation/latest/persistent-volume/#offer-operation-growvolume)
 and 
[ShrinkVolume](http://mesos.apache.org/documentation/latest/persistent-volume/#offer-operation-shrinkvolume),
 can be used both via the [scheduler 
API](http://mesos.apache.org/documentation/latest/scheduler-http-api/#accept) 
and via the [operator 
API](http://mesos.apache.org/documentation/latest/operator-http-api/#grow_volume).
+
+Persistent volume resizing is currently limited to volumes created on default 
agent disk resources - in other words, CSI volumes are not yet supported.
+
+## Offer Operation Feedback
+
+Mesos 1.6 introduces experimental support for offer operation status updates. 
Previously, only `Launch` and `LaunchGroup` operations received feedback via 
task status updates. Now, schedulers may opt to receive feedback on other offer 
operations via operation status updates by setting the `id` field in the 
operation. Similar to task status updates, when these operation updates have a 
unique `uuid` set, the scheduler must acknowledge them. This feature allows 
schedulers to ensure the reliability of offer operations like `Reserve` and 
`Create`; if such an operation fails and the scheduler has opted in to receive 
feedback, an operation status update will be sent and the scheduler can retry 
if appropriate.
+
+Offer operation feedback is currently limited to operations on resources 
provided by a resource provider - in most cases, this means that only 
operations on CSI volumes are supported.
+
+## Performance and Debugging
+
+Mesos 1.6 includes experimental support for the 
[jemalloc](http://jemalloc.net) memory allocation library. In addition to a 
potential improvement in memory allocation performance, this enables simple 
memory profiling via command-line flags and environment variables outlined in 
the 
[documentation](http://mesos.apache.org/documentation/latest/memory-profiling/).
 We expect this feature to help drive future performance improvments in Mesos 
since it improves the ability of operators to understand how Mesos behaves in 
production environments.
+
+## Docker Improvements
+
+In response to issues encountered by operators when using Mesos with the 
Docker container runtime, [several 
improvements](https://issues.apache.org/jira/browse/MESOS-8572) were made to 
the Docker containerizer and executor to help them more gracefully handle 
situations in which the Docker daemon is unresponsive. Retry and timeout logic 
has been added in several key locations so that when the Docker daemon hangs 
for short periods of time, Mesos can recover and resume normal operation.
+
+## Upgrade
+
+In most cases, upgrades from Mesos 1.5.0 to Mesos 1.6.0 are straightforward. 
Please refer to the [upgrade 
guide](http://mesos.apache.org/documentation/latest/upgrades/) for detailed 
information on upgrading to Mesos 1.6.0.
+
+Support for the Container Storage Interface (CSI) version 0.2 has been added, 
and CSI v0.1 support is now deprecated.
+
+When building Mesos with gRPC support, note that gRPC version 1.10 or later is 
now required.
+
+# Community
+
+Inspired by the work that went into this release? Want to get involved? Have 
feedback? We'd love to hear from you! Join a [working 
group](http://mesos.apache.org/documentation/latest/working-groups/) or start a 
conversation in the [community](http://mesos.apache.org/community/)!
+
+# Thank you!
+
+Thanks to the 55 contributors who made Mesos 1.6.0 possible:
+
+Adam B, Akash Gupta, Alexander Rojas, Alexander Rukletsov, Andrei Budnik, 
Andrew Schwartzmeyer, AntonDan, Armand Grillet, Benjamin Bannier, Benjamin 
Mahler, Benjamin Peterson, Benno Evers, Chun-Hung Hsiao, Clement Michaud, David 
Forsythe, Demitri Swan, EMumau, Eric Chung, Eric Mumau, Gaston Kleiman, Gilbert 
Song, Greg Mann, Harold Dost, Ilya Pronin, James Peach, Jan Schlicht, Jason 
Lai, Jeff Coffler, Jiang Yan Xu, Jie Yu, Joerg Schad, John Kordich, Joseph Wu, 
Judith Malnick, Kapil Arya, Marcin Owsiany, Megha Sharma, Meng Zhu, Michael 
Park, Murilo Pereira, Packt, Qian Zhang, Sachin Paryani, Sagar Patwardhan, 
Senthil Kumaran, Shiv Deepak, Shubham Kumar, Sofian Brabez, Till Toenshoff, 
Tomasz Janiszewski, Vinod Kone, Xudong Ni, Zhitao Li, longfei, miamipanther
+
+Enjoy Apache Mesos 1.6!

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