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Posted to issues@ozone.apache.org by "Stephen O'Donnell (Jira)" <ji...@apache.org> on 2021/11/18 16:08:00 UTC

[jira] [Updated] (HDDS-6010) EC: Create ECInputStream wrapper to choose between reconstruction and normal reads.

     [ https://issues.apache.org/jira/browse/HDDS-6010?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephen O'Donnell updated HDDS-6010:
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    Summary: EC: Create ECInputStream wrapper to choose between reconstruction and normal reads.  (was: Create ECInputStream wrapper to choose between reconstruction and normal reads.)

> EC: Create ECInputStream wrapper to choose between reconstruction and normal reads.
> -----------------------------------------------------------------------------------
>
>                 Key: HDDS-6010
>                 URL: https://issues.apache.org/jira/browse/HDDS-6010
>             Project: Apache Ozone
>          Issue Type: Sub-task
>          Components: Ozone Client
>            Reporter: Stephen O'Donnell
>            Assignee: Stephen O'Donnell
>            Priority: Major
>
> When all data locations are available, the most efficient reader is ECBlockInputStream. It also uses less memory as it does not need to buffer the full stripe. When some data locations are missing, we need to use ECBlockReconstructedStripeInputStream and ECBlockReconstructedInputStream together. There needs to be a wrapper class which creates and uses the correct underlying stream depending on data location availability.



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