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

Accelerated Database Recovery and Filegroups

Randolph West shows a change to Accelerated Database Recovery in SQL Server 2019 CTP 3.2 and later: ADR makes use of a per-database version store, instead of putting everything in the transaction log and TempDB. In most cases, the payoff more than makes up for valuable transaction log and TempDB storage. In my testing, enabling […]

Read More

Auditing Database Backups

Jovan Popovic shows how you can audit who is taking backups on an Azure SQL Managed Instance: One mechanism to ensure that nobody can take the COPY_ONLY backup of your database is to use Transparent Data Encryption that automatically encrypts all backups. In that case you would need to use Customer-managed (BYOK) TDE where you will keep […]

Read More

Categories