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https://issues.apache.org/jira/browse/YARN-6435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15954900#comment-15954900
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Rohith Sharma K S commented on YARN-6435:
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bq. if we increase max versions to max value of integer, it will directly
impact the storage footprint for the table and space required to store
corresponding data.
I think HBase should be able to handle this. Maximum versions it can maintain
is Integer.Max_value.
bq. If a metric is printed every 10 second, this means we can at max retrieve a
time series for 3 hours approximately which sounds quite less.
sorry did not get this. But for every 10 seconds means 1minute=6 versions then
6(1minute) * 60(1hour) * 24(day)= 8640 versions which is less than Integer.Max.
Typical any production cluster analysis would plot graphs with last 24 hours
metrics data most of the time.
> [ATSv2] Can't retrieve more than 1000 versions of metrics in time series
> ------------------------------------------------------------------------
>
> Key: YARN-6435
> URL: https://issues.apache.org/jira/browse/YARN-6435
> Project: Hadoop YARN
> Issue Type: Bug
> Components: timelineserver
> Reporter: Rohith Sharma K S
> Assignee: Rohith Sharma K S
> Priority: Critical
> Attachments: YARN-6435.0001.patch
>
>
> It is observed that, even though *metricslimit* is set to 1500, maximum
> number of metrics values retrieved is 1000.
> This is due to, while creating EntityTable, metrics column family max version
> is specified as 1000 which is hardcoded in
> {{EntityTable#DEFAULT_METRICS_MAX_VERSIONS}}. So, HBase will return max
> version with following {{MIN(cf max version , user provided max version)}}.
> This behavior is contradicting the documentation which claims that
> {code}
> metricslimit - If specified, defines the number of metrics to return.
> Considered only if fields contains METRICS/ALL or metricstoretrieve is
> specified. Ignored otherwise. The maximum possible value for metricslimit can
> be maximum value of Integer. If it is not specified or has a value less than
> 1, and metrics have to be retrieved, then metricslimit will be considered as
> 1 i.e. latest single value of metric(s) will be returned.
> {code}
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