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From "Mingliang Liu (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HADOOP-13783) Improve efficiency of WASB over page blobs
Date Tue, 01 Nov 2016 23:25:58 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-13783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mingliang Liu reassigned HADOOP-13783:
--------------------------------------

    Assignee: Mingliang Liu

> Improve efficiency of WASB over page blobs
> ------------------------------------------
>
>                 Key: HADOOP-13783
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13783
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: azure
>            Reporter: NITIN VERMA
>            Assignee: Mingliang Liu
>
> 1)	Add telemetry to WASB driver. WASB driver is lack of any log or telemetry which makes
trouble shoot very difficult. For example, we don’t know where is high e2e latency between
HBase and Azure storage came from when Azure storage server latency was very low. Also we
don’t know why WASB can only do 166 IOPs which is way below azure storage 500 IOPs. And
we had several incidents before related to storage latency, because of lacking logs, we couldn’t
find the ownership of the incident quickly.
> 2)	Resolving the hot spotting issue when WASB driver partition the azure page blobs by
changing the key. Current key design is causing the hot spotting on azure storage. 



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