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https://issues.apache.org/jira/browse/PARQUET-1229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17112247#comment-17112247
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ASF GitHub Bot commented on PARQUET-1229:
-----------------------------------------
ggershinsky commented on a change in pull request #776:
URL: https://github.com/apache/parquet-mr/pull/776#discussion_r427843291
##########
File path: parquet-hadoop/src/main/java/org/apache/parquet/crypto/AesCipher.java
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@@ -68,19 +67,32 @@
public static byte[] createModuleAAD(byte[] fileAAD, ModuleType moduleType,
short rowGroupOrdinal, short columnOrdinal, short pageOrdinal) {
Review comment:
Also - like with the page numbers in the previous comment, having too
many row groups will adversely affect encryption performance. There are
per-rowgroup encryption operations, always performed on small buffers -
therefore, very slow (no hardware acceleration, etc). Having dozens/hundreds of
thousands (or more) of them will significantly affect the overall encryption
time of a file. Moreover, having lots of row groups might lead to having
smaller data pages, which decreases the performance further.
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> parquet-mr code changes for encryption support
> ----------------------------------------------
>
> Key: PARQUET-1229
> URL: https://issues.apache.org/jira/browse/PARQUET-1229
> Project: Parquet
> Issue Type: Sub-task
> Components: parquet-mr
> Reporter: Gidon Gershinsky
> Assignee: Gidon Gershinsky
> Priority: Major
> Labels: pull-request-available
>
> Addition of encryption/decryption support to the existing Parquet classes and
> APIs
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