[jira] [Updated] (IGNITE-1678) IgniteAtomicSequence: make following reservations in advance

["Denis Magda (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-1678?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Denis Magda updated IGNITE-1678:
--------------------------------
    Summary: IgniteAtomicSequence: make following reservations in advance  (was: IgniteAtomicSequence: make additional reservations in advance)

> IgniteAtomicSequence: make following reservations in advance
> ------------------------------------------------------------
>
>                 Key: IGNITE-1678
>                 URL: https://issues.apache.org/jira/browse/IGNITE-1678
>             Project: Ignite
>          Issue Type: Improvement
>          Components: data structures
>    Affects Versions: ignite-1.4
>            Reporter: Denis Magda
>
> In current implementation a new reservation is made when the current local sequence boundary is exceeded.
> In cases when there are many nodes that use the same atomic sequence there can be a situation when all the nodes start doing a new reservation at the same time. This can lead to performance drops.
> As a performance optimization it makes sense to start reserving new sequence slot in advance (in background), like when around 80% of current reservation has already been used. Probably we should add a special parameter to {{AtomicConfiguration}} that will manage such behavior.



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