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Posted to issues@ozone.apache.org by "Christos Bisias (Jira)" <ji...@apache.org> on 2023/12/20 10:56:00 UTC
[jira] [Created] (HDDS-9972) Don't allow the user to set bucket quota close to the block size
Christos Bisias created HDDS-9972:
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Summary: 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
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 likeĀ
*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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