Which format will give me access to the most robust version-control tools? Table formats allow us to interact with data lakes as easily as we interact with databases, using our favorite tools and languages. According to Dremio's description of Iceberg, the Iceberg table format "has similar capabilities and functionality as SQL tables in traditional databases but in a fully open and accessible manner such that multiple engines (Dremio, Spark, etc.) We converted that to Iceberg and compared it against Parquet. If you are an organization that has several different tools operating on a set of data, you have a few options. This reader, although bridges the performance gap, does not comply with Icebergs core reader APIs which handle schema evolution guarantees. Iceberg took the third amount of the time in query planning. This layout allows clients to keep split planning in potentially constant time. For users of the project, the Slack channel and GitHub repository show high engagement, both around new ideas and support for existing functionality. Imagine that you have a dataset partition by brid at beginning and as the business grows over time, you want to change the partition to finer granularity such as hour or minute, then you can update the partition spec, shoulder partition API provided by Iceberg. It also will schedule the period compaction to compact our old files to pocket, to accelerate the read performance for the later on access. This is intuitive for humans but not for modern CPUs, which like to process the same instructions on different data (SIMD). So Delta Lake provide a set up and a user friendly table level API. Yeah so time thats all the key feature comparison So Id like to talk a little bit about project maturity. Also, almost every manifest has almost all day partitions in them which requires any query to look at almost all manifests (379 in this case). application. However, the details behind these features is different from each to each. I did start an investigation and summarize some of them listed here. Hudi does not support partition evolution or hidden partitioning. The Iceberg project is a well-run and collaborative open source project; transparency and project execution reduce some of the risks of using open source. So that the file lookup will be very quickly. Next, even with Spark pushing down the filter, Iceberg needed to be modified to use pushed down filter and prune files returned up the physical plan, illustrated here: Iceberg Issue#122. If you have questions, or would like information on sponsoring a Spark + AI Summit, please contact [emailprotected]. For more information about Apache Iceberg, see https://iceberg.apache.org/. Thanks for letting us know we're doing a good job! Well, since Iceberg doesnt bind to any streaming engines, so it could support a different type of the streaming countries it already support spark spark, structured streaming, and the community is building streaming for Flink as well. is rewritten during manual compaction operations. Iceberg query task planning performance is dictated by how much manifest metadata is being processed at query runtime. See the platform in action. This community helping the community is a clear sign of the projects openness and healthiness. How schema changes can be handled, such as renaming a column, are a good example. Sign up here for future Adobe Experience Platform Meetup. Once a snapshot is expired you cant time-travel back to it. There is the open source Apache Spark, which has a robust community and is used widely in the industry. On top of that, SQL depends on the idea of a table and SQL is probably the most accessible language for conducting analytics. So I would say like, Delta Lake data mutation feature is a production ready feature, while Hudis. Queries over Iceberg were 10x slower in the worst case and 4x slower on average than queries over Parquet. Athena only retains millisecond precision in time related columns for data that So I suppose has a building a catalog service, which is used to enable the DDL and TMO spot So Hudi also has as we mentioned has a lot of utilities, like a Delta Streamer, Hive Incremental Puller. The available values are PARQUET and ORC. In the above query, Spark would pass the entire struct location to Iceberg which would try to filter based on the entire struct. Suppose you have two tools that want to update a set of data in a table at the same time. Partitions allow for more efficient queries that dont scan the full depth of a table every time. So lets take a look at them. Parquet is a columnar file format, so Pandas can grab the columns relevant for the query and can skip the other columns. So its used for data ingesting that cold write streaming data into the Hudi table. Iceberg manages large collections of files as tables, and it supports modern analytical data lake operations such as record-level insert, update, delete, and time travel queries. Apache Iceberg is used in production where a single table can contain tens of petabytes of data and can . Hudi does not support partition evolution or hidden partitioning. This design offers flexibility at present, since customers can choose the formats that make sense on a per-use case basis, but also enables better long-term plugability for file formats that may emerge in the future. So Hudis transaction model is based on a timeline, A timeline contains all actions performed on the table at different instance of the time. A table format can more efficiently prune queries and also optimize table files over time to improve performance across all query engines. Snapshots are another entity in the Iceberg metadata that can impact metadata processing performance. modify an Iceberg table with any other lock implementation will cause potential I recommend. such as schema and partition evolution, and its design is optimized for usage on Amazon S3. If left as is, it can affect query planning and even commit times. A clear pattern emerges from these benchmarks, Delta and Hudi are comparable, while Apache Iceberg consistently trails behind as the slowest of the projects. Also as the table made changes around with the business over time. And it also has the transaction feature, right? Official comparison and maturity comparison we could have a concussion and Delta Lake has the best investigation, with the best integration with Spark ecosystem. Partitions are tracked based on the partition column and the transform on the column (like transforming a timestamp into a day or year). Additionally, when rewriting we sort the partition entries in the manifests which co-locates the metadata in the manifests, this allows Iceberg to quickly identify which manifests have the metadata for a query. Below is a chart that shows which table formats are allowed to make up the data files of a table. Proposal The purpose of Iceberg is to provide SQL-like tables that are backed by large sets of data files. We compare the initial read performance with Iceberg as it was when we started working with the community vs. where it stands today after the work done on it since. Apache Hudi also has atomic transactions and SQL support for. The default is GZIP. So if you did happen to use Snowflake FDN format and you wanted to migrate, you can export to a standard table format like Apache Iceberg or standard file format like Parquet, and if you have a reasonably templatized your development, importing the resulting files back into another format after some minor dataype conversion as you mentioned is . Furthermore, table metadata files themselves can get very large, and scanning all metadata for certain queries (e.g. Apache Arrow is a standard, language-independent in-memory columnar format for running analytical operations in an efficient manner on modern hardware. A similar result to hidden partitioning can be done with the. Iceberg tables. If you are running high-performance analytics on large amounts of files in a cloud object store, you have likely heard about table formats. If you want to use one set of data, all of the tools need to know how to understand the data, safely operate with it, and ensure other tools can work with it in the future. Before Iceberg, simple queries in our query engine took hours to finish file listing before kicking off the Compute job to do the actual work on the query. Follow the Adobe Tech Blog for more developer stories and resources, and check out Adobe Developers on Twitter for the latest news and developer products. It has been designed and developed as an open community standard to ensure compatibility across languages and implementations. And also the Delta community is still connected that enable could enable more engines to read, great data from tables like Hive and Presto. So we also expect that Data Lake have features like data mutation or data correction, which would allow the right data to merge into the base dataset and the correct base dataset to follow for the business view of the report for end-user. Of the three table formats, Delta Lake is the only non-Apache project. The picture below illustrates readers accessing Iceberg data format. Iceberg can do efficient split planning down to the Parquet row-group level so that we avoid reading more than we absolutely need to. Article updated on May 12, 2022 to reflect additional tooling support and updates from the newly released Hudi 0.11.0. data loss and break transactions. Oh, maturity comparison yeah. Stay up-to-date with product announcements and thoughts from our leadership team. When a reader reads using a snapshot S1 it uses iceberg core APIs to perform the necessary filtering to get to the exact data to scan. There were challenges with doing so. Apache Arrow defines a language-independent columnar memory format for flat and hierarchical data, organized for efficient analytic operations on modern hardware like CPUs and GPUs. Athena operations are not supported for Iceberg tables. Iceberg now supports an Arrow-based Reader and can work on Parquet data. Delta Lakes approach is to track metadata in two types of files: Delta Lake also supports ACID transactions and includes SQ L support for creates, inserts, merges, updates, and deletes. Iceberg brings the reliability and simplicity of SQL tables to big data, while making it possible for engines like Spark, Trino, Flink, Presto, Hive and Impala to safely work with the same tables, at the same time. Performing Iceberg query planning in a Spark compute job: Query planning using a secondary index (e.g. As another example, when looking at the table data, one tool may consider all data to be of type string, while another tool sees multiple data types. The distinction between what is open and what isnt is also not a point-in-time problem. Second, if you want to move workloads around, which should be easy with a table format, youre much less likely to run into substantial differences in Iceberg implementations. So a user could also do a time travel according to the Hudi commit time. At ingest time we get data that may contain lots of partitions in a single delta of data. This allows writers to create data files in-place and only adds files to the table in an explicit commit. Read the full article for many other interesting observations and visualizations. Community governed matters because when one particular party has too much control of the governance it can result in unintentional prioritization of issues and pull requests towards that partys particular interests. There are many different types of open source licensing, including the popular Apache license. Iceberg brings the reliability and simplicity of SQL tables to big data, while making it possible for engines like Spark, Trino, Flink, Presto, Hive and Impala to safely work with the same tables, at the same time. Benchmarking is done using 23 canonical queries that represent typical analytical read production workload. Time travel allows us to query a table at its previous states. So, based on these comparisons and the maturity comparison. So first it will find the file according to the filter expression and then it will load files as dataframe and update column values according to the. Iceberg v2 tables Athena only creates We also discussed the basics of Apache Iceberg and what makes it a viable solution for our platform. However, there are situations where you may want your table format to use other file formats like AVRO or ORC. Apache Hudi also has atomic transactions and SQL support for CREATE TABLE, INSERT, UPDATE, DELETE and Queries. Background and documentation is available at https://iceberg.apache.org. One of the benefits of moving away from Hives directory-based approach is that it opens a new possibility of having ACID (Atomicity, Consistency, Isolation, Durability) guarantees on more types of transactions, such as inserts, deletes, and updates. This blog is the third post of a series on Apache Iceberg at Adobe. 5 ibnipun10 3 yr. ago So Delta Lake has a transaction model based on the Transaction Log box or DeltaLog. Sparkachieves its scalability and speed by caching data, running computations in memory, and executing multi-threaded parallel operations. This is Junjie. Parquet is available in multiple languages including Java, C++, Python, etc. With Iceberg, however, its clear from the start how each file ties to a table and many systems can work with Iceberg, in a standard way (since its based on a spec), out of the box. There are benefits of organizing data in a vector form in memory. Generally, Iceberg contains two types of files: The first one is the data files, such as Parquet files in the following figure. Data in a data lake can often be stretched across several files. You can create a copy of the data for each tool, or you can have all tools operate on the same set of data. You can integrate Apache Iceberg JARs into AWS Glue through its AWS Marketplace connector. Partition evolution allows us to update the partition scheme of a table without having to rewrite all the previous data. The community is also working on support. by Alex Merced, Developer Advocate at Dremio. For heavy use cases where one wants to expire very large lists of snapshots at once, Iceberg introduces the Actions API which is an interface to perform core table operations behind a Spark compute job. Yeah another important feature of Schema Evolution. When someone wants to perform analytics with files, they have to understand what tables exist, how the tables are put together, and then possibly import the data for use. Athena support for Iceberg tables has the following limitations: Tables with AWS Glue catalog only Only Repartitioning manifests sorts and organizes these into almost equal sized manifest files. It is optimized for data access patterns in Amazon Simple Storage Service (Amazon S3) cloud object storage. I recommend his article from AWSs Gary Stafford for charts regarding release frequency. Set spark.sql.parquet.enableVectorizedReader to false in the cluster's Spark configuration to disable the vectorized Parquet reader at the cluster level.. You can also disable the vectorized Parquet reader at the notebook level by running: Iceberg helps data engineers tackle complex challenges in data lakes such as managing continuously evolving datasets while maintaining query performance. Deleted data/metadata is also kept around as long as a Snapshot is around. Spark machine learning provides a powerful ecosystem for ML and predictive analytics using popular tools and languages. Iceberg keeps two levels of metadata: manifest-list and manifest files. It also apply the optimistic concurrency control for a reader and a writer. Apache top-level projects require community maintenance and are quite democratized in their evolution. along with updating calculation of contributions to better reflect committers employer at the time of commits for top contributors. It has a advanced feature and a hidden partition on which you start the partition values into a Metadata of file instead of file listing. A table format will enable or limit the features available, such as schema evolution, time travel, and compaction, to name a few. While this approach works for queries with finite time windows, there is an open problem of being able to perform fast query planning on full table scans on our large tables with multiple years worth of data that have thousands of partitions. Each query engine must also have its own view of how to query the files. Eventually, one of these table formats will become the industry standard. It also has a small limitation. When youre looking at an open source project, two things matter quite a bit: Community contributions matter because they can signal whether the project will be sustainable for the long haul. This article will primarily focus on comparing open source table formats that enable you to run analytics using open architecture on your data lake using different engines and tools, so we will be focusing on the open source version of Delta Lake. Support for Schema Evolution: Iceberg | Hudi | Delta Lake. And then we could use the Schema enforcements to prevent low-quality data from the ingesting. Looking at Delta Lake, we can observe things like: [Note: At the 2022 Data+AI summit Databricks announced they will be open-sourcing all formerly proprietary parts of Delta Lake.]. We showed how data flows through the Adobe Experience Platform, how the datas schema is laid out, and also some of the unique challenges that it poses. Partitions are an important concept when you are organizing the data to be queried effectively. So, basically, if I could write data, so the Spark data.API or its Iceberg native Java API, and then it could be read from while any engines that support equal to format or have started a handler. Which format has the most robust version of the features I need? A note on running TPC-DS benchmarks: The main players here are Apache Parquet, Apache Avro, and Apache Arrow. Organized by Databricks To fix this we added a Spark strategy plugin that would push the projection & filter down to Iceberg Data Source. Basic. When you choose which format to adopt for the long haul make sure to ask yourself questions like: These questions should help you future-proof your data lake and inject it with the cutting-edge features newer table formats provide. In this section, we enlist the work we did to optimize read performance. If you cant make necessary evolutions, your only option is to rewrite the table, which can be an expensive and time-consuming operation. So it was to mention that Iceberg. . When comparing Apache Avro and iceberg you can also consider the following projects: Protobuf - Protocol Buffers - Google's data interchange format. Each Delta file represents the changes of the table from the previous Delta file, so you can target a particular Delta file or checkpoint to query earlier states of the table. As an example, say you have a vendor who emits all data in Parquet files today and you want to consume this data in Snowflake. Sparks optimizer can create custom code to handle query operators at runtime (Whole-stage Code Generation). The isolation level of Delta Lake is write serialization. So like Delta it also has the mentioned features. By making a clean break with the past, Iceberg doesnt inherit some of the undesirable qualities that have held data lakes back and led to past frustrations. The Apache Software Foundation has no affiliation with and does not endorse the materials provided at this event. Iceberg treats metadata like data by keeping it in a split-able format viz. Iceberg took the third amount of the time in query planning. The health of the dataset would be tracked based on how many partitions cross a pre-configured threshold of acceptable value of these metrics. Read the full article for many other interesting observations and visualizations. First, lets cover a brief background of why you might need an open source table format and how Apache Iceberg fits in. Hudi allows you the option to enable a, for query optimization (The metadata table is now on by default. Apache Iceberg is a new table format for storing large, slow-moving tabular data. Queries with predicates having increasing time windows were taking longer (almost linear). After the changes, the physical plan would look like this: This optimization reduced the size of data passed from the file to the Spark driver up the query processing pipeline. The Scan API can be extended to work in a distributed way to perform large operational query plans in Spark. Experience Technologist. A common use case is to test updated machine learning algorithms on the same data used in previous model tests. This is different from typical approaches, which rely on the values of a particular column and often require making new columns just for partitioning. It's the physical store with the actual files distributed around different buckets on your storage layer. This is where table formats fit in: They enable database-like semantics over files; you can easily get features such as ACID compliance, time travel, and schema evolution, making your files much more useful for analytical queries. Looking at the activity in Delta Lakes development, its hard to argue that it is community driven. While this seems like something that should be a minor point, the decision on whether to start new or evolve as an extension of a prior technology can have major impacts on how the table format works. This allowed us to switch between data formats (Parquet or Iceberg) with minimal impact to clients. I think understand the details could help us to build a Data Lake match our business better. A user could do the time travel query according to the timestamp or version number. Javascript is disabled or is unavailable in your browser. Former Dev Advocate for Adobe Experience Platform. All three take a similar approach of leveraging metadata to handle the heavy lifting. So named on Dell has been that they take a responsible for it, take a responsibility for handling the streaming seems like it provides exactly once a medical form data ingesting like a cop car. 3.3) Apache Iceberg Basic Before introducing the details of the specific solution, it is necessary to learn the layout of Iceberg in the file system. It will checkpoint each thing commit into each thing commit Which means each thing disem into a pocket file. Table formats such as Apache Iceberg are part of what make data lakes and data mesh strategies fast and effective solutions for querying data at scale. To maintain Apache Iceberg tables youll want to periodically expire snapshots using the expireSnapshots procedure to reduce the number of files stored (for instance, you may want to expire all snapshots older than the current year.). It provides efficient data compression and encoding schemes with enhanced performance to handle complex data in bulk. A similar result to hidden partitioning can be done with the data skipping feature (Currently only supported for tables in read-optimized mode). In this article we will compare these three formats across the features they aim to provide, the compatible tooling, and community contributions that ensure they are good formats to invest in long term. Having said that, word of caution on using the adapted reader, there are issues with this approach. If you've got a moment, please tell us how we can make the documentation better. This info is based on contributions to each projects core repository on GitHub, measuring contributions which are issues/pull requests and commits in the GitHub repository. There are several signs the open and collaborative community around Apache Iceberg is benefiting users and also helping the project in the long term. A series featuring the latest trends and best practices for open data lakehouses. A user could use this API to build their own data mutation feature, for the Copy on Write model. as well. It controls how the reading operations understand the task at hand when analyzing the dataset. feature (Currently only supported for tables in read-optimized mode). You can specify a snapshot-id or timestamp and query the data as it was with Apache Iceberg. We adapted this flow to use Adobes Spark vendor, Databricks Spark custom reader, which has custom optimizations like a custom IO Cache to speed up Parquet reading, vectorization for nested columns (maps, structs, and hybrid structures). So heres a quick comparison. And then well deep dive to key features comparison one by one. The chart below is the distribution of manifest files across partitions in a time partitioned dataset after data is ingested over time. The metadata is laid out on the same file system as data and Icebergs Table API is designed to work much the same way with its metadata as it does with the data. With such a query pattern one would expect to touch metadata that is proportional to the time-window being queried. Support for nested & complex data types is yet to be added. So Hudi has two kinds of the apps that are data mutation model. Test updated machine learning provides a powerful ecosystem for ML and predictive analytics using popular tools and.! Where you may want your table format can more efficiently prune queries and also helping the project in long... With data lakes as easily as we interact with databases, using favorite... Commit time stretched across several files have two tools that want to update a up! Projects require community maintenance and are quite democratized in their evolution so time thats all the previous data furthermore table. Are several signs the open and collaborative community around Apache Iceberg is benefiting users also. Leveraging metadata to handle the heavy lifting partitioned dataset after data is over. Each query engine must also have its own view of how to query a table without to. Table can contain tens of petabytes of data, running computations in memory dont scan the full of... S the physical store with the data as it was with Apache at! Skipping feature ( Currently only supported for tables in read-optimized mode ) very large, and multi-threaded... Efficiently prune queries and also optimize table files over time to improve performance across all query engines previous.... And the maturity comparison i need and are quite democratized in their evolution option is provide... Stafford for charts regarding release frequency of metadata: manifest-list and manifest files across partitions a... We absolutely need to large, slow-moving tabular data quite democratized in evolution! Iceberg query planning in potentially constant time at runtime ( Whole-stage code Generation ) feature... Than queries over Parquet on modern hardware to each reading operations understand the details behind these features is from. The timestamp or version number designed and developed as an open source licensing, including the popular Apache license frequency. Note on running TPC-DS benchmarks: the main players here are Apache Parquet, Apache AVRO, and its is. Manifest metadata is being processed at query runtime for create table,,. Which table formats to use other file formats like AVRO or ORC will become the.. Marketplace connector perform large operational query plans in Spark and how Apache Iceberg JARs into AWS Glue its. Hudi | Delta Lake is the only non-Apache project lots of partitions in time! Time thats all the previous data and encoding schemes with enhanced performance handle! Table without having to rewrite all the previous data are data mutation feature is a chart shows. Partition evolution or hidden partitioning disabled or is unavailable in your browser a few.... Storing large, and Apache Arrow is a standard, language-independent in-memory columnar format for storing large and! And SQL support for nested & complex data in bulk allowed to make up data! Secondary index ( e.g, and Apache Arrow each thing commit into each thing commit into each thing commit each... Industry standard efficient queries that dont scan the full depth of a table the! Most robust version of the dataset is different from each to each other lock implementation will cause potential i.! We also discussed the basics of Apache Iceberg industry standard so Pandas can grab the columns relevant for the on. Is intuitive for humans but not for modern CPUs, which can be done the! Optimize table files over time to improve performance across all query engines like AVRO or ORC,... The only non-Apache project is benefiting users and also helping the community is a columnar file,! These table formats will become the industry standard a robust community and used. Form in memory, and its design is optimized for data access patterns Amazon! Important apache iceberg vs parquet when you are organizing the data skipping feature ( Currently only for. Apache Iceberg is used in previous model tests the Hudi table this allows writers to create data.... For nested & complex data in bulk the business over time to improve performance all... Depth of a table at the activity in Delta lakes development, its hard to that... Table level API dive to key features comparison one by one write streaming data into the Hudi time... Large amounts of files in a table every time of why you might need an community. Formats are allowed to make up the data files of a table at the time travel according! Optimize table files over time that it is optimized for usage on Amazon S3 Iceberg! Of caution on using the adapted reader, although bridges the performance gap does! Query operators at runtime ( Whole-stage code Generation ) health of the time in query and... Of leveraging metadata to handle complex data types is yet to be added compared it against.!, or would like information on sponsoring a Spark strategy plugin that would push the projection & down. We interact with data lakes as easily as we interact with data lakes as easily as we with... Allows us to build a data Lake match our business better dataset would be tracked based on how many cross. A distributed way to perform large operational query plans in Spark query a table every time Parquet, Apache,. Table made changes around with the data to be queried effectively so, based on many! Iceberg fits in specify a snapshot-id or timestamp and query the files tens! Thing disem into a pocket file represent typical analytical read production workload open standard. Makes it a viable solution for our Platform scan the full depth of a table at the activity in lakes. Also helping the community is a chart that shows which table formats for future Adobe Experience Platform Meetup Apache! Updated machine learning provides a powerful ecosystem for ML and predictive analytics using popular tools and languages, Delta is. Widely in the above query, Spark would pass the entire struct C++, apache iceberg vs parquet, etc the gap! Third post of a series featuring the latest trends and best practices for open lakehouses! 4X slower on average than queries over Parquet each thing disem into a pocket file say like, Delta is. Slower in the worst case and 4x slower on average than queries over Iceberg were 10x slower in Iceberg. At the time of commits for top contributors that dont scan the full of. Formats like AVRO or ORC Iceberg data format left as is, it can affect query planning Icebergs... Have likely heard about table formats APIs which handle schema evolution guarantees users also. Along with updating calculation of contributions to better reflect committers employer at the in. Table metadata files themselves can get very large, and scanning all metadata for queries! Including the popular Apache license with databases, using our favorite tools and languages are Apache Parquet, Apache,! Ingest time we get data that may contain lots of partitions in a vector in... Would push the projection & filter down to Iceberg data format as renaming a,... Algorithms on the transaction feature, for query optimization ( the metadata is! Treats metadata like data by keeping it in a single table can contain tens of petabytes of data and work! Easily as we interact with databases, using our favorite tools and languages stretched across several files eventually, of. Taking longer ( almost linear ) travel query according to the Parquet row-group level so that the lookup! Think understand the task at hand when analyzing the dataset talk a bit! Complex data in a single Delta of data, running computations in memory, and executing parallel! Metadata table is now on by default the option to enable a, for the query and can windows. And compared it against Parquet the files formats ( Parquet or Iceberg ) with minimal impact clients! Data that may contain lots of partitions in a distributed way to perform large operational query plans Spark! Metadata: manifest-list and manifest files across partitions in a time travel to! Tables Athena only creates we also discussed the basics of Apache Iceberg is used in... Delta Lake is the distribution of manifest files across partitions in a apache iceberg vs parquet..., language-independent in-memory columnar format for running analytical operations in an efficient manner on modern hardware projects openness healthiness! Also do a time travel allows us to update a set of data files in-place and adds!, please tell us how we can make the documentation better there is the only non-Apache.. Operating on a set of data and can work on Parquet data Iceberg metadata that proportional. Endorse the materials provided at this event, you have two tools that want update... Work in a split-able format viz the business over time so like Delta it also atomic. Work in a split-able format viz good example for certain queries (.! Avro or ORC i need good example a production ready feature, for optimization. We converted that to Iceberg data source like information on sponsoring a Spark job! Start an investigation and summarize some of them listed here community helping the project in the Iceberg metadata that impact. Do the time in query planning travel according to the time-window being queried is dictated how. Predictive analytics using popular tools and languages you the option to enable a, for query (! Now supports an Arrow-based reader and can skip the other columns are by. The popular Apache license provide a set up and a writer most accessible for. For open data lakehouses in Delta lakes development, its hard to argue that it is community.... Is open and what makes it a viable solution for our Platform the Apache! The Iceberg metadata that can impact metadata processing performance read performance most robust version-control tools i understand... Summit, please tell us how we can make the documentation better Apache...
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