Zouxxyy commented on code in PR #9416:
URL: https://github.com/apache/hudi/pull/9416#discussion_r1324756063
##########
hudi-client/hudi-client-common/src/main/java/org/apache/hudi/client/HoodieTimelineArchiver.java:
##########
@@ -388,60 +387,40 @@ private Map<String, Boolean>
deleteFilesParallelize(HoodieTableMetaClient metaCl
paths);
}
- private Stream<HoodieInstant> getCleanInstantsToArchive() {
- HoodieTimeline cleanAndRollbackTimeline = table.getActiveTimeline()
-
.getTimelineOfActions(CollectionUtils.createSet(HoodieTimeline.CLEAN_ACTION,
HoodieTimeline.ROLLBACK_ACTION)).filterCompletedInstants();
- return cleanAndRollbackTimeline.getInstantsAsStream()
-
.collect(Collectors.groupingBy(HoodieInstant::getAction)).values().stream()
- .map(hoodieInstants -> {
- if (hoodieInstants.size() > this.maxInstantsToKeep) {
- return hoodieInstants.subList(0, hoodieInstants.size() -
this.minInstantsToKeep);
- } else {
- return new ArrayList<HoodieInstant>();
- }
- }).flatMap(Collection::stream);
- }
-
- private Stream<HoodieInstant> getCommitInstantsToArchive() throws
IOException {
- // TODO (na) : Add a way to return actions associated with a timeline and
then merge/unify
- // with logic above to avoid Stream.concat
- HoodieTimeline commitTimeline = table.getCompletedCommitsTimeline();
-
- // Get the oldest inflight instant and a completed commit before this
inflight instant.
- Option<HoodieInstant> oldestPendingInstant = table.getActiveTimeline()
- .getWriteTimeline()
- .filter(instant -> !instant.isCompleted())
- .firstInstant();
-
- // Oldest commit to retain is the greatest completed commit, that is less
than the oldest pending instant.
- // In some cases when inflight is the lowest commit then oldest commit to
retain will be equal to oldest
- // inflight commit.
- Option<HoodieInstant> oldestCommitToRetain;
- if (oldestPendingInstant.isPresent()) {
- Option<HoodieInstant> completedCommitBeforeOldestPendingInstant =
- Option.fromJavaOptional(commitTimeline.getReverseOrderedInstants()
- .filter(instant ->
HoodieTimeline.compareTimestamps(instant.getTimestamp(),
- LESSER_THAN,
oldestPendingInstant.get().getTimestamp())).findFirst());
- // Check if the completed instant is higher than the oldest inflight
instant
- // in that case update the oldestCommitToRetain to oldestInflight commit
time.
- if (!completedCommitBeforeOldestPendingInstant.isPresent()
- ||
HoodieTimeline.compareTimestamps(oldestPendingInstant.get().getTimestamp(),
- LESSER_THAN,
completedCommitBeforeOldestPendingInstant.get().getTimestamp())) {
- oldestCommitToRetain = oldestPendingInstant;
+ private List<HoodieInstant> getCommitInstantsToArchive() throws IOException {
+ HoodieTimeline completedCommitsTimeline =
table.getCompletedCommitsTimeline();
+
+ if (completedCommitsTimeline.countInstants() > maxInstantsToKeep) {
+ // Step1: Get all candidates of oldestInstantToRetain.
+ List<Option<HoodieInstant>> oldestInstantToRetainCandidates = new
ArrayList<>();
+
Review Comment:
In fact, I made two refactoring here:
1. Move the filter logic in the original `getInstantsToArchive` to
`getCommitInstantsToArchive` (see points 4. If metadata table is enabled... and
5. If this is a metadata table...)
2. Since there are 5 logics to obtain `oldestInstantToRetainCandidates` now,
and they are all as the same boundary to pick instants, it is natural to take
their minimum value.
The first one is necessary, because the previous logic was wrong, all filter
for commit instants should be put together; and the second one is natural I
think, otherwise we have to write 5 filters like this:
```java
}).filter(s -> {
// oldestCommitToRetain is the highest completed commit instant
that is less than the oldest inflight instant.
// By filtering out any commit >= oldestCommitToRetain, we can
ensure there are no gaps in the timeline
// when inflight commits are present.
return oldestCommitToRetain
.map(instant -> compareTimestamps(instant.getTimestamp(),
GREATER_THAN, s.getTimestamp()))
.orElse(true);
}).filter(s ->
oldestInstantToRetainForCompaction.map(instantToRetain ->
compareTimestamps(s.getTimestamp(), LESSER_THAN,
instantToRetain.getTimestamp()))
.orElse(true)
).filter(s ->
oldestInstantToRetainForClustering.map(instantToRetain ->
HoodieTimeline.compareTimestamps(s.getTimestamp(),
LESSER_THAN, instantToRetain.getTimestamp()))
.orElse(true)
);
```
There are no logical changes in the above changes, and I have carefully
checked them, what do you think?
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