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sjwiesman pushed a commit to branch release-1.13
in repository https://gitbox.apache.org/repos/asf/flink.git
The following commit(s) were added to refs/heads/release-1.13 by this push:
new e015753 [hotfix][docs] Update release notes for 1.13 with state
backend migration details
e015753 is described below
commit e01575337bfe12e40644b0aeff9fa89e9e00ffd1
Author: Seth Wiesman <sjwies...@gmail.com>
AuthorDate: Fri Jul 9 15:29:12 2021 -0500
[hotfix][docs] Update release notes for 1.13 with state backend migration
details
Co-authored-by: David Anderson <da...@alpinegizmo.com>
---
docs/content.zh/release-notes/flink-1.13.md | 15 ++++++++++++++-
docs/content/release-notes/flink-1.13.md | 17 ++++++++++++++++-
2 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/docs/content.zh/release-notes/flink-1.13.md
b/docs/content.zh/release-notes/flink-1.13.md
index 13def89..dceda51 100644
--- a/docs/content.zh/release-notes/flink-1.13.md
+++ b/docs/content.zh/release-notes/flink-1.13.md
@@ -38,6 +38,20 @@ by default before) and there is no option to configure a
synchronous snapshot an
The constructors of `FsStateBackend` and `MemoryStateBackend` that take a flag
for sync/async
snapshots are kept for API compatibility, but the flags are ignored now.
+##### [FLINK-19463](https://issues.apache.org/jira/browse/FLINK-19463)
+
+Flink has always separated local state storage from fault tolerance.
+Keyed state is maintained locally in state backends, either on the JVM heap or
in embedded RocksDB instances.
+Fault tolerance comes from checkpoints and savepoints - periodic snapshots of
a job's internal state to some durable file system - such as Amazon S3 or HDFS.
+
+Historically, Flink's `StateBackend` interface intermixed these concepts in a
way that confused many users.
+In 1.13, checkpointing configurations have been extracted into their own
interface, `CheckpointStorage`.
+
+This change does not affect the runtime behavior and simply provides a better
mental model to users.
+Pipelines can be updated to use the new the new abstractions without losing
state, consistency, or change in semantics.
+
+Please follow the [migration
guide](https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/ops/state/state_backends/#migrating-from-legacy-backends)
or the JavaDoc on the deprecated state backend classes - `MemoryStateBackend`,
`FsStateBackend` and `RocksDBStateBackend` for migration details.
+
#### Unify binary format for Keyed State savepoints
##### [FLINK-20976](https://issues.apache.org/jira/browse/FLINK-20976)
@@ -299,4 +313,3 @@ recovered.
The community decided to deprecate the Apache Mesos support for Apache Flink.
It is subject to
removal in the future. Users are encouraged to switch to a different resource
manager.
-
diff --git a/docs/content/release-notes/flink-1.13.md
b/docs/content/release-notes/flink-1.13.md
index 13def89..1798564 100644
--- a/docs/content/release-notes/flink-1.13.md
+++ b/docs/content/release-notes/flink-1.13.md
@@ -38,6 +38,22 @@ by default before) and there is no option to configure a
synchronous snapshot an
The constructors of `FsStateBackend` and `MemoryStateBackend` that take a flag
for sync/async
snapshots are kept for API compatibility, but the flags are ignored now.
+#### Disentangle StateBackends from Checkpointing
+
+##### [FLINK-19463](https://issues.apache.org/jira/browse/FLINK-19463)
+
+Flink has always separated local state storage from fault tolerance.
+Keyed state is maintained locally in state backends, either on the JVM heap or
in embedded RocksDB instances.
+Fault tolerance comes from checkpoints and savepoints - periodic snapshots of
a job's internal state to some durable file system - such as Amazon S3 or HDFS.
+
+Historically, Flink's `StateBackend` interface intermixed these concepts in a
way that confused many users.
+In 1.13, checkpointing configurations have been extracted into their own
interface, `CheckpointStorage`.
+
+This change does not affect the runtime behavior and simply provides a better
mental model to users.
+Pipelines can be updated to use the new the new abstractions without losing
state, consistency, or change in semantics.
+
+Please follow the [migration
guide](https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/ops/state/state_backends/#migrating-from-legacy-backends)
or the JavaDoc on the deprecated state backend classes - `MemoryStateBackend`,
`FsStateBackend` and `RocksDBStateBackend` for migration details.
+
#### Unify binary format for Keyed State savepoints
##### [FLINK-20976](https://issues.apache.org/jira/browse/FLINK-20976)
@@ -299,4 +315,3 @@ recovered.
The community decided to deprecate the Apache Mesos support for Apache Flink.
It is subject to
removal in the future. Users are encouraged to switch to a different resource
manager.
-
