Skip to content

[SPARK-47720][CORE] Update spark.speculation.multiplier to 3 and spark.speculation.quantile to 0.9 #45858

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
dongjoon-hyun wants to merge 2 commits into from
Closed

[SPARK-47720][CORE] Update spark.speculation.multiplier to 3 and spark.speculation.quantile to 0.9 #45858

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
d04a0c0
[SPARK-47720][CORE] Update `spark.speculation.multiplier` to 3 and `s…
dongjoon-hyun Apr 3, 2024
1e87333
Add migration guide and fix two test failures
dongjoon-hyun Apr 3, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Prev Previous commit
Add migration guide and fix two test failures
  • Loading branch information
@dongjoon-hyun
dongjoon-hyun committed Apr 3, 2024
commit 1e87333a533870412658bdcf4449115c7562151b
2 changes: 2 additions & 0 deletions core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2013,6 +2013,7 @@ class TaskSetManagerSuite
val conf = new SparkConf()
conf.set(config.SPECULATION_ENABLED, true)
conf.set(config.SPECULATION_QUANTILE.key, speculationQuantile.toString)
conf.set(config.SPECULATION_MULTIPLIER.key, "1.5")
// Set the number of slots per executor
conf.set(config.EXECUTOR_CORES.key, numExecutorCores.toString)
conf.set(config.CPUS_PER_TASK.key, numCoresPerTask.toString)
Expand Down Expand Up @@ -2414,6 +2415,7 @@ class TaskSetManagerSuite
// minTimeToSpeculation parameter to checkSpeculatableTasks
val conf = new SparkConf()
.set(config.SPECULATION_MULTIPLIER, 0.0)
.set(config.SPECULATION_QUANTILE, 0.75)
.set(config.SPECULATION_ENABLED, true)
sc = new SparkContext("local", "test", conf)
val ser = sc.env.closureSerializer.newInstance()
Expand Down
2 changes: 2 additions & 0 deletions docs/core-migration-guide.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,8 @@ license: |

- Since Spark 4.0, the default log4j output has shifted from plain text to JSON lines to enhance analyzability. To revert to plain text output, you can either set `spark.log.structuredLogging.enabled` to `false`, or use a custom log4j configuration.

- Since Spark 4.0, Spark performs speculative executions less agressively with `spark.speculation.multiplier=3` and `spark.speculation.quantile=0.9`. To restore the legacy behavior, you can set `spark.speculation.multiplier=1.5` and `spark.speculation.quantile=0.75`.

## Upgrading from Core 3.4 to 3.5

- Since Spark 3.5, `spark.yarn.executor.failuresValidityInterval` is deprecated. Use `spark.executor.failuresValidityInterval` instead.
Expand Down