Description
This MR proposes to access the LMDB address table for lookups in a lock-less and read-only fashion. The idea stems from cmsgemonline/gem-ops/gem-daq-doc#2 (closed) which requires mounting the /mnt/persistent CTP7 partition in read-only mode for safe operations. Even with the absence of a lock, the read-only nature of the LMDB lookups allows for concurrent safe accesses. Care has been taken to also ensure safe address table updates.
Related Issue
Required to implement cmsgemonline/gem-ops/gem-daq-doc#2 (closed)
How Has This Been Tested?
The address table can be created and used seamlessly in the CVP13 build. Pending tests in production on the CTP7.
Types of changes
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Bug fix (non-breaking change which fixes an issue) -
New feature (non-breaking change which adds functionality) -
Breaking change (fix or feature that would cause existing functionality to change)
Checklist:
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My code follows the code style of this project. -
My change requires a change to the documentation. -
I have updated the documentation accordingly. -
I have read the CONTRIBUTING document. -
I have added tests to cover my changes. -
All new and existing tests passed.