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https://issues.apache.org/jira/browse/SOLR-17146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bruno Roustant resolved SOLR-17146.
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Fix Version/s: 9.6.0
Resolution: Fixed
> Add DelegatingBackupRepository and alternative checksum verification
> --------------------------------------------------------------------
>
> Key: SOLR-17146
> URL: https://issues.apache.org/jira/browse/SOLR-17146
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Bruno Roustant
> Priority: Major
> Fix For: 9.6.0
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> Currently all BackupRepository copy methods systematically verify the
> checksum of the index file to copy before copying it to the repository.
> This poses a problem when the file to copy cannot be verified with the
> standard Lucene checksum check. For example if the file was encrypted, the
> checkum would need to be verified in a different manner.
> We propose to
> 1- Add an optional initialization argument to disable the checksum
> verification (enabled by default) in each BackupRepository implementation.
> 2- Introduce an abstract DelegatingBackupDirectory to extend when we need to
> perform different/additional logic on top of a delegate BackupDirectory. For
> example, verify the checksum differently. Also, the DelegatingBackupDirectory
> could inject some initialization arguments when the BackupRepositoryFactory
> creates its delegate.
> Also make the existing TrackingBackupRepository (for tests) extend
> DelegatingBackupDirectory.
> 3- Add a test case to AbstractBackupRepositoryTest to ensure all
> implementations support disabling the checksum verification. And add a test
> for LocalFileSystemDirectory (not tested currently) that also extends
> AbstractBackupRepositoryTest.
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