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https://issues.apache.org/jira/browse/HBASE-18008?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chia-Ping Tsai updated HBASE-18008:
-----------------------------------
    Release Note: 
1) The HColumnDescriptor got from Admin, AsyncAdmin, and Table is immutable. 
2) HColumnDescriptor have been marked as "Deprecated" and user should 
substituted  
     ColumnFamilyDescriptor for HColumnDescriptor.
3) ColumnFamilyDescriptor is constructed through ColumnFamilyDescriptorBuilder 
and it contains all of the read-only methods from HColumnDescriptor
4) The value to which the IS_MOB/MOB_THRESHOLD is mapped is stored as String 
rather than Boolean/Long. The MOB is an new feature to 2.0 so this change 
should be acceptable

  was:
1) The HColumnDescriptor got from Admin, AsyncAdmin, and Table is immutable. 
2) HColumnDescriptor have been marked as "Deprecated" and user should 
substituted  
     ColumnFamilyDescriptor for HColumnDescriptor.
3) ColumnFamilyDescriptor is constructed through ColumnFamilyDescriptorBuilder 
and it contains all of the  
    read-only methods from HColumnDescriptor
4) The value to which the IS_MOB/MOB_THRESHOLD is mapped is stored as String 
rather than 
    Boolean/Long. The MOB is an new feature to 2.0 so this change should be 
acceptable


> Any HColumnDescriptor we give out should be immutable
> -----------------------------------------------------
>
>                 Key: HBASE-18008
>                 URL: https://issues.apache.org/jira/browse/HBASE-18008
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 2.0.0
>            Reporter: Chia-Ping Tsai
>            Assignee: Chia-Ping Tsai
>             Fix For: 2.0.0, 3.0.0
>
>         Attachments: HBASE-18008.v0.patch, HBASE-18008.v1.patch, 
> HBASE-18008.v2.patch, HBASE-18008.v3.patch, HBASE-18008.v4.patch, 
> HBASE-18008.v5.patch, HBASE-18008.v6.patch, HBASE-18008.v6.patch, 
> HBASE-18008.v7.patch, HBASE-18008.v7.patch
>
>
> This is similar to HBASE-15583, but we should move up on to the 
> ColumnFamilyDescriptor rather than ColumnDescriptor.
>  



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