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Posted to common-issues@hadoop.apache.org by "Owen O'Malley (Jira)" <ji...@apache.org> on 2023/06/09 06:00:00 UTC
[jira] [Commented] (HADOOP-18535) Implement token storage solution based on MySQL
[ https://issues.apache.org/jira/browse/HADOOP-18535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17730822#comment-17730822 ]
Owen O'Malley commented on HADOOP-18535:
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This patch adds a "provided" dependence of the mysql connector, which is gpl licensed. This is allowed because this is an optional component of Hadoop and the user will need to install the mysql connector.
https://www.apache.org/legal/resolved.html#optional
> Implement token storage solution based on MySQL
> -----------------------------------------------
>
> Key: HADOOP-18535
> URL: https://issues.apache.org/jira/browse/HADOOP-18535
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Hector Sandoval Chaverri
> Assignee: Hector Sandoval Chaverri
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0, 3.3.6
>
>
> Hadoop RBF supports custom implementations of secret managers. At the moment, the only available implementation is ZKDelegationTokenSecretManagerImpl, which stores tokens and delegation keys in Zookeeper.
> During our investigation, we found that the performance of routers is limited by the writes to the Zookeeper token store, which impacts requests for token creation, renewal and cancellation. An alternative secret manager implementation has been created, based on MySQL, to handle a higher number of writes.
> We measured the throughput of each token operation (create/renew/cancel) on different setups and obtained the following results:
> # Sending requests directly to Namenode (no RBF):
> Token creations: 290 reqs per sec
> Token renewals: 86 reqs per sec
> Token cancellations: 97 reqs per sec
> # Sending requests to routers using Zookeeper based secret manager:
> Token creations: 31 reqs per sec
> Token renewals: 29 reqs per sec
> Token cancellations: 40 reqs per sec
> # Sending requests to routers using SQL based secret manager:
> Token creations: 241 reqs per sec
> Token renewals: 103 reqs per sec
> Token cancellations: 114 reqs per sec
> We noticed a significant improvement when using a SQL secret manager, comparable to the throughput offered by Namenodes.
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