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https://issues.apache.org/jira/browse/HDDS-1234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16797919#comment-16797919
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Aravindan Vijayan edited comment on HDDS-1234 at 3/21/19 2:26 PM:
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*Summary of what the patch does*.
* Changed the Recon container DB type from the one used by SCM to the one used
by OM since the latter had a more suitable interface
* Created a scheduled task
(org.apache.hadoop.ozone.recon.tasks.ContainerKeyMapperTask) that iterates the
OM DB snapshot and populates the Recon container DB with container,key -> count
mapping.
* Implemented the container key GET service which returns the list of Keys
associated with a container ID.
* Added Codecs for the Key and value used in Recon container DB.
* Refined the Container Key prefix class that is used as Key in the Recon
container DB to hold version information as well.
* Further refined the OzoneManagerServiceProvider and ContainerDBService
implementations.
* Removed the prefix seek iterator added in HDDS-1232 since there is an
alternate way to do that.
* Add more unit tests.
cc [~swagle]
was (Author: avijayan):
*Summary of what the patch does*.
* Changed the Recon container DB type from the one used by SCM to the one used
by OM since the later had a more suitable interface
* Created a scheduled task
(org.apache.hadoop.ozone.recon.tasks.ContainerKeyMapperTask) that iterates the
OM DB snapshot and populates the Recon container DB with container,key -> count
mapping.
* Implemented the container key GET service which returns the list of Keys
associated with a container ID.
* Added Codecs for the Key and value used in Recon container DB.
* Refined the Container Key prefix class that is used as Key in the Recon
container DB to hold version information as well.
* Further refined the OzoneManagerServiceProvider and ContainerDBService
implementations.
* Removed the prefix seek iterator added in HDDS-1232 since there is an
alternate way to do that.
* Add more unit tests.
cc [~swagle]
> Iterate the OM DB snapshot and populate the recon container DB.
> ----------------------------------------------------------------
>
> Key: HDDS-1234
> URL: https://issues.apache.org/jira/browse/HDDS-1234
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Components: Ozone Recon
> Reporter: Aravindan Vijayan
> Assignee: Aravindan Vijayan
> Priority: Major
> Fix For: 0.5.0
>
> Attachments: HDDS-1234-000.patch
>
>
> * OM DB snapshot contains the Key->ContainerId + BlockId information.
> * Iterate the OM snapshot DB and create the reverse map of (ContainerId, Key
> prefix) -> Key count to be stored in the Recon container DB.
> * Use a codec to store data into Recon container DB.
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