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From "Dmitriy Pavlov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-7584) Smooth decrease WAL write speed if low work segments left
Date Wed, 31 Jan 2018 12:12:00 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-7584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dmitriy Pavlov updated IGNITE-7584:
-----------------------------------
    Issue Type: Improvement  (was: Task)

> Smooth decrease WAL write speed if low work segments left
> ---------------------------------------------------------
>
>                 Key: IGNITE-7584
>                 URL: https://issues.apache.org/jira/browse/IGNITE-7584
>             Project: Ignite
>          Issue Type: Improvement
>          Components: persistence
>            Reporter: Dmitriy Pavlov
>            Assignee: Dmitriy Pavlov
>            Priority: Major
>
> Smooth decrease of the write speed in WAL when approaching the exhaustion of current
segments in the working directory.
> Now archiver segment switch involves file copying and may be bottleneck of speed of grid
operation.
> Now if out of work segments occurs, grid put speed drop down to 0 ops/sec ocurred.
> This isssue was fixed under IGNITE-7017 with providing new 'NoArchvier' mode, but in
case archiver based WAL is already used by end-user, it is required to have opportunity to
smooth decrease speed instead of drop to 0.



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