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From "Pallavi Rao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FALCON-1205) SLAService to keep track of missing SLAs for feeds
Date Fri, 22 May 2015 08:43:17 GMT

    [ https://issues.apache.org/jira/browse/FALCON-1205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14555838#comment-14555838
] 

Pallavi Rao commented on FALCON-1205:
-------------------------------------

I gave the patch a quick look and I have a basic question. Seems like patch is logging the
SLA misses into a local file. I'm not sure if that is easy to use for a monitoring service
for the following reasons:
1. Hard for users to find out the delta, or a time window based misses or on a continuous
basis.
2. Since it is a local file, users will need to read the file from each of the Falcon Server,
to get a consolidated view.

Few options we can consider:
1. Falcon anyway has dependencies on Active MQ, why not publish any SLA misses as messages
to JMS endpoints. If we want to keep the logs in the file for history purpose, we can still
do that.
2. Provide a REST API that user can use to query the SLA misses (with a time window). If we
expose this on Prism, it will take care of consolidation from all the Falcon Servers.


> SLAService to keep track of missing SLAs for feeds
> --------------------------------------------------
>
>                 Key: FALCON-1205
>                 URL: https://issues.apache.org/jira/browse/FALCON-1205
>             Project: Falcon
>          Issue Type: Sub-task
>            Reporter: Ajay Yadava
>            Assignee: Ajay Yadava
>         Attachments: FALCON-1205.patch
>
>
> We need a service to keep track of missing feed instances. 



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