Hello,
I want to start a discussion on how we plan to deal with ever-increasing
build times in the long term.
While the profile reorganization proposed in FLINK-7047 again brings us
below 50 minute build times
it is only a matter of time once we hit the timeout again. There is
already one profile getting close to
it (flink-tests + java7/scala10 @ 45-47m) which we can't split up
further on a module level.
The following is a list of suggestions/efforts brought forth by various
people and myself that could help:
Compile time reductions:
1. *Rework shading model* (in-progress)
* With the addition of flink-shaded we can reduce the build-times by
1. not having to build shaded modules for every build
2. requiring less shading to be required, as we work against
the shaded namespaces directly
* *actual impact not measured
2. *Drop flink-storm*
* There's been discussions for parking flink-storm anyway, and we
would save between 1 to 2 minutes.
3. *R**epository split*
* A "flink-libraries" repo wouldn't require building core modules,
connectors; by design it would download all these and only
compile flink-libraries modules.
Test time reductions:
1. *Don't run expensive tests* (duh)*
*
* A significant portion of the build time is spent on a relatively
small number of tests (excerpt below):
o flink-runtime
+ ChannelViewsTest (1m)
+ FileChannelStreamsITCase (40s)
+ ExternalSortITCase (2.5m)
+ ExternalSortLargeRecordsITCase (2m)
o flink-tests
+ JobManagerHACheckpointRecoveryITCase (2.5m)
+ TaskManagerProcessFailureBatchRecoveryITCase (1m)
+ JobManagerHAProcessFailureBatchRecoveryITCase (1.5m)
+ UdfStreamOperatorCheckpointingITCase (2m)
+ IncrementalRocksDbBackendEventTimeWindowCheckpointingITCase
(3m)
* We can either rework/tweak these tests or move them into
nightly/cron builds
2. *R**epository split*
* In the context of build times the main benefit of a repo split
is reduction in compile times. A "flink-libraries" repo wouldn't
require building core modules, connectors or a complicated maven
setup to work around these; by design it would download all
these and only compile flink-libraries modules.
Let me know what you think.
Regards,
Chesnay Schepler
