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https://issues.apache.org/jira/browse/HBASE-13996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14705095#comment-14705095
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Andrew Purtell commented on HBASE-13996:
----------------------------------------
Thanks.
Since this a utility, it would make sense to support adjusting/overriding these
config parameters with command line options:
{code}
+ public static final String HBASE_CANARY_WRITE_DATA_TTL_KEY =
"hbase.canary.write.data.ttl";
+
+ public static final String
HBASE_CANARY_WRITE_PERSERVER_REGIONS_LOWERLIMIT_KEY =
+ "hbase.canary.write.perserver.regions.lowerLimit";
+
+ public static final String
HBASE_CANARY_WRITE_PERSERVER_REGIONS_UPPERLIMIT_KEY =
+ "hbase.canary.write.perserver.regions.upperLimit";
+
+ public static final String HBASE_CANARY_WRITE_VALUE_SIZE_KEY =
"hbase.canary.write.value.size";
+
+ public static final String HBASE_CANARY_WRITE_TABLE_CHECK_PERIOD_KEY =
+ "hbase.canary.write.table.check.period";
{code}
Not a big deal either way.
+1 for patch v3
> Add write sniffing in canary
> ----------------------------
>
> Key: HBASE-13996
> URL: https://issues.apache.org/jira/browse/HBASE-13996
> Project: HBase
> Issue Type: Improvement
> Components: canary
> Affects Versions: 0.98.13, 1.1.0.1
> Reporter: Liu Shaohui
> Assignee: Liu Shaohui
> Fix For: 2.0.0, 1.3.0, 0.98.15
>
> Attachments: HBASE-13996-v001.diff, HBASE-13996-v002.diff,
> HBASE-13996-v003.diff
>
>
> Currently the canary tool only sniff the read operations, it's hard to
> finding the problem in write path.
> To support the write sniffing, we create a system table named '_canary_' in
> the canary tool. And the tool will make sure that the region number is large
> than the number of the regionserver and the regions will be distributed onto
> all regionservers.
> Periodically, the tool will put data to these regions to calculate the write
> availability of HBase and send alerts if needed.
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