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Posted to issues@ozone.apache.org by "Sammi Chen (Jira)" <ji...@apache.org> on 2023/04/04 08:32:00 UTC
[jira] [Resolved] (HDDS-8325) Consolidate and refine RocksDB metrics of services
[ https://issues.apache.org/jira/browse/HDDS-8325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sammi Chen resolved HDDS-8325.
------------------------------
Fix Version/s: 1.4.0
Resolution: Fixed
> Consolidate and refine RocksDB metrics of services
> --------------------------------------------------
>
> Key: HDDS-8325
> URL: https://issues.apache.org/jira/browse/HDDS-8325
> Project: Apache Ozone
> Issue Type: Improvement
> Reporter: Sammi Chen
> Assignee: Sammi Chen
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.4.0
>
> Attachments: Screenshot 2023-03-30 at 12-11-53 Screenshot.png, Screenshot 2023-03-30 at 12-14-38 Screenshot.png, Screenshot 2023-03-30 at 12-21-48 Screenshot.png
>
>
> RocksDB related metrics are important indicators of how RocksDB is running, and also can facilitate RocksDB related issue investigation.
> The majority of RocksDB metrics are exposed when property "ozone.metastore.rocksdb.statistics" is set to 'ALL'.
> Issues found are,
> 1. RocksDB metric of one RocksDB instance are exposed twice in jmx, one time in prometheus. Here is DN example, dn-crl.db is exposed twice in JMX with different metrics name. (b) is exposed in prometheus
> a. ) "name" : "Hadoop:service=Ozone,name=RocksDbStore,dbName=dn-crl.db",
> b. ) "name" : "Hadoop:service=HddsDatanode,name=Rocksdb_dn-crl.db",
> 2. blob related RocksDB metrics are exposed. Blob DB is not used in Ozone, we can filter these parts of metrics
> 3. duplicate "estimated key count" info exposed in both Rocksdb_scm.db and SCMMetadataStoreMetrics.
> This task will
> 1. remove the duplicated exposure of RocksDB instance in jmx
> 2. filter blob db related metrics
> 3. remove SCMMetadataStoreMetrics as its function is covered by Rocksdb_scm.db already.
>
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