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From "Jonathan Yaniv (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3656) LowCost: A Cost-Based Placement Agent for YARN Reservations
Date Wed, 24 Jun 2015 00:17:43 GMT

    [ https://issues.apache.org/jira/browse/YARN-3656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14598623#comment-14598623
] 

Jonathan Yaniv commented on YARN-3656:
--------------------------------------

Thanks Carlo. I attached a new version of the patch (v1.1), in which we also implement GreedyReservationAgent
using our algorithmic framework.
We verified that the behavior of the new version is identical to the original via simulations
(= the implementations generated identical allocations) and unit tests (= the implementations
behaved similarly on corner cases). We also ran test-patch locally on v1.1 of the patch and
got +1.

> LowCost: A Cost-Based Placement Agent for YARN Reservations
> -----------------------------------------------------------
>
>                 Key: YARN-3656
>                 URL: https://issues.apache.org/jira/browse/YARN-3656
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler, resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Ishai Menache
>            Assignee: Jonathan Yaniv
>              Labels: capacity-scheduler, resourcemanager
>         Attachments: LowCostRayonExternal.pdf, YARN-3656-v1.1.patch, YARN-3656-v1.patch,
lowcostrayonexternal_v2.pdf
>
>
> YARN-1051 enables SLA support by allowing users to reserve cluster capacity ahead of
time. YARN-1710 introduced a greedy agent for placing user reservations. The greedy agent
makes fast placement decisions but at the cost of ignoring the cluster committed resources,
which might result in blocking the cluster resources for certain periods of time, and in turn
rejecting some arriving jobs.
> We propose LowCost – a new cost-based planning algorithm. LowCost “spreads” the
demand of the job throughout the allowed time-window according to a global, load-based cost
function. 



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