prateekm commented on a change in pull request #1160: Transactional State
[1/5]: Added Store Checkpoint API
URL: https://github.com/apache/samza/pull/1160#discussion_r326751049
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File path:
samza-kv-rocksdb/src/main/scala/org/apache/samza/storage/kv/RocksDbKeyValueStore.scala
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@@ -236,6 +239,13 @@ class RocksDbKeyValueStore(
trace("Flushed store: %s" format storeName)
}
+ override def checkpoint(id: String): Optional[Path] = {
+ val checkpoint = Checkpoint.create(db)
+ val checkpointPath = dir.getPath + "-" + id
Review comment:
RocksDB checkpoint dir is required to be unique. Otherwise RocksDB will
throw: `org.rocksdb.RocksDBException: Directory exists`
In part 5, id will be created using (current time millis + last 3 digit of
nanotime), so the directory will typically be unique.
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