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From "Eshcar Hillel (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16417) In-Memory MemStore Policy for Flattening and Compactions
Date Fri, 11 Nov 2016 09:19:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15656597#comment-15656597
] 

Eshcar Hillel commented on HBASE-16417:
---------------------------------------

Number of regions in all experiments is 50.
Figure 3 compares default memstore with mslabs (blue column) and without mslabs (purple column)
in a PE run with write only workload uniform distribution. Here are the absolute numbers:
|| write latencies ||MB/s||50th||75th||95th||99th||99.9th||99.99th||99.999th||
|no compaction|207.2|	57.3|	60.1|	80.7|	9608|	55362|	162462.6|	816825|
|no compaction (no mslab)|207.88|	57.0|	59.9|	85.2|	9496|	55521|	167699.7|	933907|

Figure 6 compares default memstore with mslabs (blue column) and without mslabs (purple column)
in a YCSB run with mixed workload zipfian distribution. Here are the absolute numbers:
|| read latencies||	op/s||	#gc||	avg||	50th	||75th||	95th||	99th||
|no compaction|	5673|	7693|	3596.0|	2109|	3061.0|	4303|	5535.0|
|no compaction (no mslab)|	7900|	6601|	2586|	2137|	3027.0|	4163|	5211.0|

I can re-run the benchmarks if you believe this is in contradiction with your previous findings.
But the HW is different and might affect the results. 

> In-Memory MemStore Policy for Flattening and Compactions
> --------------------------------------------------------
>
>                 Key: HBASE-16417
>                 URL: https://issues.apache.org/jira/browse/HBASE-16417
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Anastasia Braginsky
>            Assignee: Eshcar Hillel
>             Fix For: 2.0.0
>
>         Attachments: HBASE-16417-benchmarkresults-20161101.pdf, HBASE-16417-benchmarkresults-20161110.pdf
>
>




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