[jira] [Commented] (HBASE-14951) Make hbase.regionserver.maxlogs obsolete

["Enis Soztutar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-14951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15047616#comment-15047616 ] 

Enis Soztutar commented on HBASE-14951:
---------------------------------------

Just some numbers for comparison
|| heap || memstore perc || maxLogs ||
| 1G | 40% | 8 | 
| 2G | 40% | 16 | 
| 10G | 40% | 80 |
| 20G | 40% | 160 |
| 32G | 40% | 256 |

Do we need to do {{max(32, calculateMaxLogFiles(..))}} given that with 1G default it is 8 now? 

There is some discrepancy between the memstore size of edits and the WAL size of the edits, but 2x multiplier I guess accounts for that. 



> Make hbase.regionserver.maxlogs obsolete
> ----------------------------------------
>
>                 Key: HBASE-14951
>                 URL: https://issues.apache.org/jira/browse/HBASE-14951
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-14951-v1.patch
>
>
> There was a discussion in HBASE-14388 related to maximum number of log files. It was an agreement that we should calculate this number in a code but still need to honor user's setting. 
> Maximum number of log files now is calculated as following:
>  maxLogs = HEAP_SIZE * memstoreRatio * 2/ LogRollSize



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