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Subject [GitHub] [drill] arina-ielchiieva commented on a change in pull request #1953: Add docs for Drill Metastore
Date Tue, 04 Feb 2020 12:21:40 GMT
arina-ielchiieva commented on a change in pull request #1953: Add docs for Drill Metastore
URL: https://github.com/apache/drill/pull/1953#discussion_r374638553
 
 

 ##########
 File path: _docs/performance-tuning/drill-metastore/030-drill-iceberg-metastore.md
 ##########
 @@ -0,0 +1,69 @@
+---
+title: "Drill Iceberg Metastore"
+parent: "Drill Metastore"
+date: 2020-01-31
+---
+
+Drill uses Iceberg Metastore implementation based on [Iceberg tables](http://iceberg.incubator.apache.org).
For Drill 1.17,
+ this is default Drill Metastore implementation. For details on how to configure Iceberg
Metastore implementation and
+ its option descriptions, please refer to [Iceberg Metastore docs](https://github.com/apache/drill/blob/master/metastore/iceberg-metastore/README.md).
+
+{% include startnote.html %}
+Iceberg table supports concurrent writes and transactions but they are only effective on
file systems that support
+ atomic rename.
+If the file system does not support atomic rename, it could lead to inconsistencies during
concurrent writes.
 
 Review comment:
   User can use Iceberg Metastore on local fs or S3 but he should be aware of concurrency
issues since none of them supports atomic rename, as long as one user uses it, it will be
fine.

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