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https://issues.apache.org/jira/browse/HBASE-4213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13102353#comment-13102353
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Ted Yu commented on HBASE-4213:
-------------------------------
In HBaseAdmin.java, javadoc should be added for instantAdd parameter:
{code}
* @param column column descriptor of column to be added
* @throws IOException if a remote or network exception occurs
*/
- public void addColumn(final String tableName, HColumnDescriptor column)
+ public void addColumn(final String tableName, HColumnDescriptor column,
boolean instantAdd)
throws IOException {
{code}
Personally I prefer creating an enum, possibly called SCHEMA_OP_TYPE, which
should contain NORMAL and INSTANT. There are two benefits:
1. the enum is more meaningful for readers
2. SCHEMA_OP_TYPE.INSTANT covers add/delete. This may provide benefit for
related code.
This is minor, though.
> Support for fault tolerant, instant schema updates with out master's
> intervention (i.e with out enable/disable and bulk assign/unassign) through
> ZK.
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-4213
> URL: https://issues.apache.org/jira/browse/HBASE-4213
> Project: HBase
> Issue Type: Improvement
> Reporter: Subbu M Iyer
> Assignee: Subbu M Iyer
> Fix For: 0.92.0
>
> Attachments: 4213-Instant_Schema_change_through_ZK.patch,
> 4213-V5-Support_instant_schema_changes_through_ZK.patch, 4213.v6,
> HBASE-4213-Instant_schema_change.patch,
> HBASE-4213_Instant_schema_change_-Version_2_.patch,
> HBASE_Instant_schema_change-version_3_.patch
>
>
> This Jira is a slight variation in approach to what is being done as part of
> https://issues.apache.org/jira/browse/HBASE-1730
> Support instant schema updates such as Modify Table, Add Column, Modify
> Column operations:
> 1. With out enable/disabling the table.
> 2. With out bulk unassign/assign of regions.
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