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https://issues.apache.org/jira/browse/HBASE-20883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16553998#comment-16553998
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Hari Sekhon edited comment on HBASE-20883 at 7/24/18 9:24 AM:
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I agree with you [~apurtell]... for the larger clusters they will need more
tooling anyway, but a lot of customers these days are running smaller clusters
of higher performance/density and tuning them to make use of the previously
overspec'd enterprise hardware (that's what I'm doing right now in fact).
It's surprising what one can do with a dozen or two high spec machines these
days, so this would be of benefit to a lot of these middle users who aren't
internet giants, which seem to make up more of the user base in the last few
years than the bigger name internet companies of old.
was (Author: harisekhon):
I agree with you [~apurtell]... for the larger clusters they will need more
tooling anyway, but a lot of customers these days are running smaller clusters
of higher performance/density and tuning them to make use of the previously
overspec'd enterprise hardware (that's what I'm doing right now in fact).
it's surprising what one can do with a dozen or two high spec machines these
days, so this would be of benefit to a lot of these middle users who aren't
internet giants, which seem to make up more of the user base in the last few
years than the bigger name internet companies of old.
> HMaster Read / Write Requests Per Sec across RegionServers, currently only
> Total Requests Per Sec
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-20883
> URL: https://issues.apache.org/jira/browse/HBASE-20883
> Project: HBase
> Issue Type: Improvement
> Components: Admin, master, metrics, monitoring, UI, Usability
> Affects Versions: 1.1.2
> Reporter: Hari Sekhon
> Priority: Major
>
> HMaster currently shows Requests Per Second per RegionServer under HMaster
> UI's /master-status page -> Region Servers -> Base Stats section in the Web
> UI.
> Please add Reads Per Second and Writes Per Second per RegionServer alongside
> this in the HMaster UI, and also expose the Read/Write/Total requests per sec
> information in the HMaster JMX API.
> This will make it easier to find read or write hotspotting on HBase as a
> combined total will minimize and mask differences between RegionServers. For
> example, we do 30,000 reads/sec but only 900 writes/sec to each RegionServer,
> so write skew will be masked as it won't show enough significant difference
> in the much larger combined Total Requests Per Second stat.
> For now I've written a Python tool to calculate this info from RegionServers
> JMX read/write/total request counts but since HMaster is collecting this info
> anyway it shouldn't be a big change to improve it to also show Reads / Writes
> Per Sec as well as Total.
> Find my tools for more granular Read/Write Requests Per Sec Per Regionserver
> and also Per Region at my [PyTools github
> repo|https://github.com/harisekhon/pytools] along with a selection of other
> HBase tools I've used for performance debugging over the years.
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