[
https://issues.apache.org/jira/browse/HBASE-18848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
stack updated HBASE-18848:
--------------------------
Tags: beginner
Labels: beginner (was: )
Component/s: tooling
Operability
> meta region loading reporter
> ----------------------------
>
> Key: HBASE-18848
> URL: https://issues.apache.org/jira/browse/HBASE-18848
> Project: HBase
> Issue Type: Bug
> Components: Operability, tooling
> Reporter: stack
> Labels: beginner
>
> We need reporting on meta table accesses.
> In quiet a few cases, it is said that our client -- I can believe it -- does
> too many lookups against meta.
> In another case, we found that the hbase canary was ddos'ing the meta table
> but it took a bunch of messing digging in rpc TRACE to figure out this was
> the case.
> A few users at scale are fingering meta ops as the bound to their being able
> to scale more (especially if their readers are hosted in MR and startup is a
> big bang burst of meta scanning)
> The report would dump numbers on clients, incidence and type of queries. It
> would highlight bad actors and pathological behaviors.
> This is a particular instance of what a general trace system might provide
> but we don't have that yet. This could be a good first exercise implementing
> a trace or it might just use trace engine mechanics to realize a few dump
> jsps. Whatever, we need some tooling for operators.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
