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Where are the logs for a Tungsten Cluster?

The Question

Recently, a customer asked us:

Where are the logs for a Tungsten Cluster and which are the proper log files to monitor if I do a master role switch to another node?

The Answer: Part I

Both basic and advanced logs are available!

The basic logs are symbolic links into the log subdirectory for each layer of the cluster.

For example, this is the listing of the default log directory, `/opt/continuent/service_logs`:

connector-user.log -> /opt/continuent/tungsten/tungsten-connector/log/connector-user.log
manager-user.log -> /opt/continuent/tungsten/tungsten-manager/log/manager-user.log
mysqldump.log -> /opt/continuent/tungsten/tungsten-replicator/log/mysqldump.log
replicator-user.log -> /opt/continuent/tungsten/tungsten-replicator/log/replicator-user.log
xtrabackup.log -> /opt/continuent/tungsten/tungsten-replicator/log/xtrabackup.log

As you can see, each log file is a symlink to the user-level log for each of the layers, along with logs for backups.

You may also cd into each of the "real" log directories and look at the following, more detailed logs:

/opt/continuent/tungsten/tungsten-manager/log/tmsvc.log
/opt/continuent/tungsten/tungsten-connector/log/connector.log
/opt/continuent/tungsten/tungsten-replicator/log/trepsvc.log

The Answer: Part II

Focus on the Manager and Connector logs

To monitor a master switch, the Manager log is best:
`/opt/continuent/tungsten/tungsten-manager/log/tmsvc.log`

and to a lesser degree the Connector log:
`/opt/continuent/tungsten/tungsten-connector/log/connector.log`

Summary

The Wrap-Up

In this blog post we discussed the Tungsten Cluster basic and advanced logs, their locations and which ones to use to monitor a master role switch to another node.

To learn about Continuent solutions in general, check out https://www.continuent.com/solutions

The Library

Please read the docs!

For more information about Tungsten clusters, please visit https://docs.continuent.com

Tungsten Clustering is the most flexible, performant global database layer available today - use it underlying your SaaS offering as a strong base upon which to grow your worldwide business!

For more information, please visit https://www.continuent.com/solutions

Want to learn more or run a POC? Contact us

About the Author

Eric M. Stone
COO

Eric is a veteran of fast-paced, large-scale enterprise environments with 35 years of Information Technology experience. With a focus on HA/DR, from building data centers and trading floors to world-wide deployments, Eric has architected, coded, deployed and administered systems for a wide variety of disparate customers, from Fortune 500 financial institutions to SMB’s.

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