jackye1995 commented on code in PR #6600: URL: https://github.com/apache/iceberg/pull/6600#discussion_r1171734347
########## docs/delta-lake-migration.md: ########## @@ -0,0 +1,124 @@ +--- +title: "Delta Lake Migration" +url: delta-lake-migration +menu: + main: + parent: "Migration" + weight: 300 +--- +<!-- + - 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. + --> + +# Delta Lake Table Migration +Delta Lake is a table format that supports Parquet file format and provides time travel and versioning features. When migrating data from Delta Lake to Iceberg, +it is common to migrate all snapshots to maintain the history of the data. + +Currently, Iceberg only supports the Snapshot Table action for migrating from Delta Lake to Iceberg tables. It is done via the `iceberg-delta-lake` module +by using [Delta Standalone](https://docs.delta.io/latest/delta-standalone.html) to read logs of Delta lake tables. +Since Delta Lake tables maintain snapshots, all available snapshots will be committed to the new Iceberg table as transactions in order. Review Comment: nit: maintain transactions. Delta does not have snapshot as its concept -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
