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From "Vadim Opolski (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Deleted] (IGNITE-4756) Print info about partition distribution to log
Date Fri, 18 Aug 2017 09:18:00 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-4756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vadim Opolski updated IGNITE-4756:
----------------------------------
    Comment: was deleted

(was: [~tledkov-gridgain] [~avinogradov] Log4JLogger dependency removed from core module.
Log have been initialize early. I'm working on printing cache group name in log and calculating
statistics only for loacal node. What's the next step?
)

> Print info about partition distribution to log 
> -----------------------------------------------
>
>                 Key: IGNITE-4756
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4756
>             Project: Ignite
>          Issue Type: Improvement
>          Components: general
>            Reporter: Taras Ledkov
>            Assignee: Vadim Opolski
>            Priority: Minor
>              Labels: newbie
>             Fix For: 2.2
>
>
> Summarize discussions:
> Add log message in case partitions distribution is not close to even distribution:
> # Add system property IGNITE_PART_DISTRIBUTION_WARN_THRESHOLD with default value 0.1
to print warn message only when nodes count differs more then threshold;
> # The statistic is calculated and printed only for the local node;
> # Statistic is placed at the {{GridAffinityAssignmentCache#calculate}} and calculated
for new {{idealAssignment}}.
> # Message format is
> {noformat}
> Local node affinity assignment distribution is not ideal [cache=<cache_name>, expectedPrimary=<ideal_count_of_primary_partitions>,
exectedBackups=<ideal_count_of_backups>, primary=<count_of_primary_partitions>,
backups=<count_of_backup_partitions>].
> {noformat}
> e.g. for cache with name "test", 2 backups, 4 partition, 3 nodes:
> {noformat}
> Local node affinity assignment distribution is not ideal [cache=test, expectedPrimary=1.33
(33.3%), exectedBackups=2.66 (66.66%), primary=1 (25%), backups=3(75%)].
> {noformat}



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