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https://issues.apache.org/jira/browse/BLUR-77?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13638195#comment-13638195
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Aaron McCurry commented on BLUR-77:
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Yes, there is a read only version of the BlurIndex class. Just hasn't been
updated in 0.1.5 to use the TableContext object like the BlurNRTIndex class.
Checkout:
https://git-wip-us.apache.org/repos/asf?p=incubator-blur.git;a=blob;f=src/blur-core/src/main/java/org/apache/blur/manager/writer/BlurIndexReader.java;h=28e393a433d5814f1fb1068959c1d2f66b4d902a;hb=0.1.5
A little background:
There are two ways to update a table that is online in a Blur cluster. The
first way is to call mutate on the given controller/shard servers that perform
NRT (near real time) updates on the indexes. The second way is to use
Map/Reduce to update the indexes directly. In the MR method of updating, the
reducers in the MR job actually open the indexes (that are being served by the
blur shard servers) and perform the updates directly. The reason for the
read-only attribute on the table is because if you want to use the MR way of
mutates then the indexes can NOT be open for writing in the shard servers.
Lucene allows only a single index writer at a time. The other reason for a
read-only table is to simple not allow changes to the table.
> Fix the readonly version of BlurIndex
> -------------------------------------
>
> Key: BLUR-77
> URL: https://issues.apache.org/jira/browse/BLUR-77
> Project: Apache Blur
> Issue Type: Bug
> Affects Versions: 0.1.5
> Reporter: Aaron McCurry
> Fix For: 0.1.5
>
>
> If you try and create a readonly version of a Blur table it will fail because
> it's not implemented.
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