Github user alpinegizmo commented on a diff in the pull request:
https://github.com/apache/flink/pull/3258#discussion_r99368591
--- Diff: docs/ops/upgrading.md ---
@@ -35,23 +35,105 @@ under the License.
## Upgrading the Flink Framework Version
- - Either "in place" : Savepoint -> stop/cancel -> shutdown cluster ->
start new version -> start job
- - Another cluster variant : Savepoint -> resume in other cluster ->
"flip switch" -> shutdown old cluster
+This section describes the general way of upgrading Flink framework
version from version 1.1.x to 1.2.x and migrating your
+jobs between the two versions.
+
+In a nutshell, this procedure consists of 2 fundamental steps:
+
+1. Take a savepoint in Flink 1.1.x for the jobs you want to migrate.
+2. Resume your jobs under Flink 1.2.x from the previously taken savepoints.
+
+Besides those two fundamental steps, some additional steps can be required
that depend on the way you want to change the
+Flink version. In this guide we differentiate two approaches to upgrade
from Flink 1.1.x to 1.2.x: **inplace** upgrade and
--- End diff --
**in-place** would be better than **inplace** (here and also in the next
paragraph)
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