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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2022/03/02 05:43:49 UTC
[GitHub] [flink-table-store] tsreaper opened a new pull request #29: [FLINK-26442] Allow ManifestFile to write a list of ManifestFileMeta into multiple files if too many
tsreaper opened a new pull request #29:
URL: https://github.com/apache/flink-table-store/pull/29
Currently `ManifestFile#write` will only produce a single file no matter how large the given `ManifestFileMeta` list is. However batch jobs are likely to produce a lot of changes hence the list might be very long. We need to allow `ManifestFile#write` to produce multiple files for effective merging and filtering.
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[GitHub] [flink-table-store] JingsongLi merged pull request #29: [FLINK-26442] Allow ManifestFile to write a list of ManifestFileMeta into multiple files if too many
Posted by GitBox <gi...@apache.org>.
JingsongLi merged pull request #29:
URL: https://github.com/apache/flink-table-store/pull/29
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[GitHub] [flink-table-store] JingsongLi commented on a change in pull request #29: [FLINK-26442] Allow ManifestFile to write a list of ManifestFileMeta into multiple files if too many
Posted by GitBox <gi...@apache.org>.
JingsongLi commented on a change in pull request #29:
URL: https://github.com/apache/flink-table-store/pull/29#discussion_r817368776
##########
File path: flink-table-store-core/src/main/java/org/apache/flink/table/store/file/utils/RollingFile.java
##########
@@ -0,0 +1,129 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.table.store.file.utils;
+
+import org.apache.flink.api.common.serialization.BulkWriter;
+import org.apache.flink.core.fs.FSDataOutputStream;
+import org.apache.flink.core.fs.FileSystem;
+import org.apache.flink.core.fs.Path;
+import org.apache.flink.table.data.RowData;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.List;
+
+/** A utility class to write a list of objects into several files, each with a size limit. */
+public class RollingFile {
+
+ /**
+ * Provide logic for serializing records and producing file metas.
+ *
+ * @param <R> record type
+ * @param <F> file meta type
+ */
+ public interface Context<R, F> {
Review comment:
Actually, this context also contains the statistics of the information. It is stateful class.
What about a `RollingFile` and `FileWriter`? `FileWriter` is only responsible for writing single file.
##########
File path: flink-table-store-core/src/main/java/org/apache/flink/table/store/file/utils/RollingFile.java
##########
@@ -0,0 +1,129 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.table.store.file.utils;
+
+import org.apache.flink.api.common.serialization.BulkWriter;
+import org.apache.flink.core.fs.FSDataOutputStream;
+import org.apache.flink.core.fs.FileSystem;
+import org.apache.flink.core.fs.Path;
+import org.apache.flink.table.data.RowData;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.List;
+
+/** A utility class to write a list of objects into several files, each with a size limit. */
+public class RollingFile {
+
+ /**
+ * Provide logic for serializing records and producing file metas.
+ *
+ * @param <R> record type
+ * @param <F> file meta type
+ */
+ public interface Context<R, F> {
+
+ /** Create the path for a new file. */
+ Path newPath();
+
+ /** Create a new object writer. */
+ BulkWriter<RowData> newWriter(FSDataOutputStream out) throws IOException;
+
+ /**
+ * Called before writing a record into file. Per-record calculation can be performed here.
+ *
+ * @param record record to write
+ * @return serialized record
+ */
+ RowData serialize(R record);
Review comment:
`toRowData`
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