jt2594838 commented on a change in pull request #429: [IOTDB-205]Support
storage-group-level data ttl
URL: https://github.com/apache/incubator-iotdb/pull/429#discussion_r337304790
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File path:
server/src/main/java/org/apache/iotdb/db/engine/storagegroup/StorageGroupProcessor.java
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@@ -580,6 +610,65 @@ public void syncDeleteDataFiles() {
}
}
+ /**
+ * Iterate each TsFile and try to lock and remove those out of TTL.
+ */
+ public synchronized void checkFilesTTL() {
+ if (dataTTL == Long.MAX_VALUE) {
+ logger.debug("{}: TTL not set, ignore the check", storageGroupName);
+ return;
+ }
+ long timeBound = System.currentTimeMillis() - dataTTL;
+ if (logger.isDebugEnabled()) {
+ logger.debug("{}: TTL removing files before {}", storageGroupName, new
Date(timeBound));
+ }
+ // copy to avoid concurrent modification of deletion
+ List<TsFileResource> seqFiles = new ArrayList<>(sequenceFileList);
+ List<TsFileResource> unseqFiles = new ArrayList<>(unSequenceFileList);
+
+ for (TsFileResource tsFileResource : seqFiles) {
+ checkFileTTL(tsFileResource, timeBound, true);
+ }
+ for (TsFileResource tsFileResource : unseqFiles) {
+ checkFileTTL(tsFileResource, timeBound, false);
+ }
Review comment:
Unfortunately, the Iterator of ArrayList does not provide concurrent safety,
either.
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