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Date: Fri, 2 Jun 2017 09:57:04 +0000 (UTC)
From: "Weiwei Yang (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Created] (HDFS-11918) Ozone: Encapsulate KSM metadata key
 into protobuf messages for better (de)serialization
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archived-at: Fri, 02 Jun 2017 09:57:10 -0000

Weiwei Yang created HDFS-11918:
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             Summary: Ozone: Encapsulate KSM metadata key into protobuf messages for better (de)serialization
                 Key: HDFS-11918
                 URL: https://issues.apache.org/jira/browse/HDFS-11918
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: ozone
            Reporter: Weiwei Yang
            Assignee: Weiwei Yang
            Priority: Critical


There are multiple type of keys stored in KSM database
# Volume Key
# Bucket Key
# Object Key
# User Key

Currently they are represented as plain string with different convention, such as
# /volume
# /volume/bucket
# /volume/bucket/key
# $user

this approach makes it so difficult to parse volume/bucket/keys from KSM database. Propose to encapsulate these types of keys into protobuf messages, and take advantage of protobuf to serialize(deserialize) classes to byte arrays (and vice versa).


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