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Posted to issues@ozone.apache.org by "Krishna Kumar Asawa (Jira)" <ji...@apache.org> on 2023/12/22 06:53:00 UTC
[jira] [Assigned] (HDDS-9972) Don't allow the user to set bucket quota close to the block size
[ https://issues.apache.org/jira/browse/HDDS-9972?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Krishna Kumar Asawa reassigned HDDS-9972:
-----------------------------------------
Assignee: Sumit Agrawal
> Don't allow the user to set bucket quota close to the block size
> ----------------------------------------------------------------
>
> Key: HDDS-9972
> URL: https://issues.apache.org/jira/browse/HDDS-9972
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Christos Bisias
> Assignee: Sumit Agrawal
> Priority: Major
>
> The default block size is 256MB. When storing a key, we are reserving and preallocating the space based on the block size, multiplied by the replication factor.
> For example,
> * we want to write a 300MB key
> * 1 block = 256MB
> * 2 blocks = 512MB
> * the 300MB key will require 2 blocks
> * If Replication factor is Ratis THREE
> We will need to preallocate *2blocks * 256MB * 3replfactor = 1536MB.*
> Setting the bucket quota to anything lower than that, will result in allowing the user to write only 1 key in the bucket and that key's size should be less than 256MB. Any other write will be blocked due to disk space requirements.
> We should set a limit to how low the bucket quota can be. This is a blur idea but it could be something like
> *default block size (get from config) * default replication factor (get from config) * X*
> and upon failure there could be an error message like
> *Default replication type is {}, replication factor is {} and block size is {}. Bucket quota can't be less than {}*
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