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From "Phabricator (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4768) Per-(table, columnFamily) metrics with configurable table name inclusion
Date Tue, 15 Nov 2011 01:28:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13150154#comment-13150154
] 

Phabricator commented on HBASE-4768:
------------------------------------

mbautin has committed the revision "[jira] [HBASE-4768] Per-(table, columnFamily) metrics
with configurable table name inclusion".

REVISION DETAIL
  https://reviews.facebook.net/D363

COMMIT
  https://reviews.facebook.net/rHBASE1201994

                
> Per-(table, columnFamily) metrics with configurable table name inclusion
> ------------------------------------------------------------------------
>
>                 Key: HBASE-4768
>                 URL: https://issues.apache.org/jira/browse/HBASE-4768
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Mikhail Bautin
>            Assignee: Mikhail Bautin
>         Attachments: D363.1.patch, D363.2.patch, D363.3.patch, D363.4.patch, D363.5.patch
>
>
> As we kept adding more granular block read and block cache usage statistics, a combinatorial
explosion of various cases to monitor started to happen, especially when we wanted both per-table/column
family/block type statistics and aggregate statistics on various subsets of these dimensions.
Here, we un-clutters HFile readers, LruBlockCache, StoreFile, etc. by creating a centralized
class that knows how to update all kinds of per-table/CF/block type counters. 
> Table name and column family configuration have been pushed to a base class, SchemaConfigured.
This is convenient as many of existing classes that have these properties (HFile readers/writers,
HFile blocks, etc.) did not have a base class. Whether to collect per-(table, columnFamily)
or per-columnFamily only metrics can be configured with the hbase.metrics.showTableName configuration
key. We don't expect this configuration to change at runtime, so we cache the setting statically
and log a warning when an attempt is made to flip it once already set. This way we don't have
to pass configuration to a lot more places, e.g. everywhere an HFile reader is instantiated.
> Thanks to Liyin for his initial version of per-table metrics patch and a lot of valuable
feedback.

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