hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HBASE-17462) Investigate using sliding window for read/write request costs in StochasticLoadBalancer
Date Sat, 14 Jan 2017 00:32:26 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17462?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu reassigned HBASE-17462:
------------------------------

    Assignee: Tim Brown

> Investigate using sliding window for read/write request costs in StochasticLoadBalancer
> ---------------------------------------------------------------------------------------
>
>                 Key: HBASE-17462
>                 URL: https://issues.apache.org/jira/browse/HBASE-17462
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Tim Brown
>
> In the thread, http://search-hadoop.com/m/HBase/YGbbyUZKXWALkX1, Timothy was asking whether
the read/write request costs in StochasticLoadBalancer should be calculated as rates.
> This makes sense since read / write load on region server tends to fluctuate over time.
Using sliding window would reflect more recent trend in read / write load.
> Some factors to consider:
> The data structure used by StochasticLoadBalancer should be concise. The
> number of regions in a cluster can be expected to approach 1 million. We
> cannot afford to store long history of read / write requests in master.
> Efficiency of cost calculation should be high - there're many cost
> functions the balancer goes through, it is expected for each cost function
> to return quickly. Otherwise we would not come up with proper region
> movement plan(s) in time.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message