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https://issues.apache.org/jira/browse/HBASE-25246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17243312#comment-17243312
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Viraj Jasani commented on HBASE-25246:
--------------------------------------
RSRpcServices has this logic:
{code:java}
if (clientCellBlockSupported) {
for (Result res : results) {
builder.addCellsPerResult(res.size());
builder.addPartialFlagPerResult(res.mayHaveMoreCellsInRow());
}
controller.setCellScanner(CellUtil.createCellScanner(results));
} else {
for (Result res : results) {
ClientProtos.Result pbr = ProtobufUtil.toResult(res);
builder.addResults(pbr);
}
}
{code}
Hence, if client doesn't have cellBlock supported, we go to
ProtobufUtil.toResult(final Result result), which internally calls
ProtobufUtil.toCell(final Cell kv) and hence, kvbuilder.setTags() (as per PR
#2706) is executed.
> Backup/Restore hbase cell tags.
> -------------------------------
>
> Key: HBASE-25246
> URL: https://issues.apache.org/jira/browse/HBASE-25246
> Project: HBase
> Issue Type: Improvement
> Components: backup&restore
> Reporter: Rushabh Shah
> Assignee: Rushabh Shah
> Priority: Major
> Fix For: 3.0.0-alpha-1, 2.2.7, 2.3.4, 2.5.0, 2.4.1
>
>
> In PHOENIX-6213 we are planning to add cell tags for Delete mutations. After
> having a discussion with hbase community via dev mailing thread, it was
> decided that we will pass the tags via an attribute in Mutation object and
> persist them to hbase via phoenix co-processor. The intention of PHOENIX-6213
> is to store metadata in Delete marker so that while running Restore tool we
> can selectively restore certain Delete markers and ignore others. For that to
> happen we need to persist these tags in Backup and retrieve them in Restore
> MR jobs (Import/Export tool).
> Currently we don't persist the tags in Backup.
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