Apache Solr Backup And Recovery

Hrishikesh Gadre shows how to back up indexes in Apache Solr:

The backup mechanism allows an administrator to create a physically separate copy of index files and configuration metadata for a Solr collection. Any subsequent change to a Solr collection state (e.g. removing documents, deleting index files or changing collection configuration) has no impact on the state of this backup. As part of disaster recovery, the restore operation creates a new Solr collection and initializes it to the state represented by a Solr collection backup.

It’s probably safest to treat data in Solr as secondary data, in the sense that you should be able to rebuild the entire data set from scratch instead of Solr being a primary data store.  I’m not a big fan of the author using the term “disaster recovery” instead of just “recovery” or “backup restoration” (as they’re different concepts), but it’s worth the read.

Related Posts

Identifying Deprecated Features

Dave Mason provides a method for determining if you’re using deprecated functionality on your SQL Server instance: I’ve wanted to do some Event Notification testing for SQL Server deprecation events for quite some time. The thought process here is that I could send myself an alert to identify usage of SQL Server features that will […]

Read More

VMware Configuration For SQL Server

Jeff Mlakar talks about things you want to look at if you’re running SQL Server on VMware: In a virtual data center CPU is spread across many guest VMs. This is one of the key drivers behind the effort to virtualize – CPU cores mostly sit unused. For example, we can take a host with […]

Read More

Categories