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https://issues.apache.org/jira/browse/PHOENIX-2221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15081597#comment-15081597
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Alicia Ying Shu commented on PHOENIX-2221:
------------------------------------------
[~jamestaylor] Thanks for the info. In MetaDataEndpointImpl.java, will
invalidate the cache update the client cache? In my test, writes are not
blocked because the INDEX_DISABLE_TIMESTAMP is not updated in client cache. If
it takes time to update the client cache, this approach will allow more writes
than those of previous approach. Make sense?
{noformat}
@Override
public void updateIndexState(RpcController controller,
UpdateIndexStateRequest request,
RpcCallback<MetaDataResponse> done) {
.....
// Invalidate from cache
Cache<ImmutableBytesPtr,PMetaDataEntity> metaDataCache =
GlobalCache.getInstance(this.env).getMetaDataCache();
metaDataCache.invalidate(cacheKey);
}
{noformat}
> Option to make data regions not writable when index regions are not available
> -----------------------------------------------------------------------------
>
> Key: PHOENIX-2221
> URL: https://issues.apache.org/jira/browse/PHOENIX-2221
> Project: Phoenix
> Issue Type: Improvement
> Reporter: Devaraj Das
> Assignee: Alicia Ying Shu
> Fix For: 4.7.0
>
> Attachments: PHOENIX-2221-v1.patch, PHOENIX-2221-v2.patch,
> PHOENIX-2221-v3.patch, PHOENIX-2221.patch
>
>
> In one usecase, it was deemed better to not accept writes when the index
> regions are unavailable for any reason (as opposed to disabling the index and
> the queries doing bigger data-table scans).
> The idea is that the index regions are kept consistent with the data regions,
> and when a query runs against the index regions, one can be reasonably sure
> that the query ran with the most recent data in the data regions. When the
> index regions are unavailable, the writes to the data table are rejected.
> Read queries off of the index regions would have deterministic performance
> (and on the other hand if the index is disabled, then the read queries would
> have to go to the data regions until the indexes are rebuilt, and the queries
> would suffer).
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