[
https://issues.apache.org/jira/browse/HBASE-25766?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Toshihiro Suzuki updated HBASE-25766:
-------------------------------------
Release Note:
After HBASE-25766, we can specify a split restriction, "KeyPrefix" or
"DelimitedKeyPrefix", to a table with the
"hbase.regionserver.region.split_restriction.type" property. The "KeyPrefix"
split restriction groups rows by a prefix of the row-key. And the
"DelimitedKeyPrefix" split restriction groups rows by a prefix of the row-key
with a delimiter.
For example:
```
# Create a table with a "KeyPrefix" split restriction, where the prefix length
is 2 bytes
hbase> create 'tbl1', 'fam', {CONFIGURATION =>
{'hbase.regionserver.region.split_restriction.type' => 'KeyPrefix',
'hbase.regionserver.region.split_restriction.prefix_length' => '2'}}
# Create a table with a "DelimitedKeyPrefix" split restriction, where the
delimiter is a comma (,)
hbase> create 'tbl2', 'fam', {CONFIGURATION =>
{'hbase.regionserver.region.split_restriction.type' => 'DelimitedKeyPrefix',
'hbase.regionserver.region.split_restriction.delimiter' => ','}}
```
Instead of specifying a split restriction to a table directly, we can also set
the properties in hbase-site.xml. In this case, the specified split restriction
is applied for all the tables.
Note that after this change, the split restriction is also applied to a
user-specified split point so that we don't allow users to break the
restriction, which is a behavior change.
was:
After HBASE-25766, we can specify a split restriction, "KeyPrefix" or
"DelimitedKeyPrefix", to a table with the
"hbase.regionserver.region.split_restriction.type" property. The "KeyPrefix"
split restriction groups rows by a prefix of the row-key. And the
"DelimitedKeyPrefix" split restriction groups rows by a prefix of the row-key
with a delimiter.
For example:
```
# Create a table with a "KeyPrefix" split restriction, where the prefix length
is 2 bytes
hbase> create 'tbl1', 'fam', {CONFIGURATION =>
{'hbase.regionserver.region.split_restriction.type' => 'KeyPrefix',
'hbase.regionserver.region.split_restriction.prefix_length' => '2'}}
# Create a table with a "DelimitedKeyPrefix" split restriction, where the
delimiter is a comma (,)
hbase> create 'tbl2', 'fam', {CONFIGURATION =>
{'hbase.regionserver.region.split_restriction.type' => 'DelimitedKeyPrefix',
'hbase.regionserver.region.split_restriction.delimiter' => ','}}
```
Instead of specifying a split restriction to a table directly, we can also set
the properties in hbase-site.xml. In this case, the specified split restriction
is applied for all the tables.
> Introduce RegionSplitRestriction that restricts the pattern of the split point
> ------------------------------------------------------------------------------
>
> Key: HBASE-25766
> URL: https://issues.apache.org/jira/browse/HBASE-25766
> Project: HBase
> Issue Type: Improvement
> Reporter: Toshihiro Suzuki
> Assignee: Toshihiro Suzuki
> Priority: Major
> Fix For: 3.0.0-alpha-1, 2.4.3
>
>
> As discussed in HBASE-25706, we can introduce RegionSplitRestriction that
> restricts the pattern of the split point.
> See the following comment for the details:
> https://issues.apache.org/jira/browse/HBASE-25706?focusedCommentId=17310190&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17310190
> CC: [~zhangduo] [~stack]
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