Proof-of-concept implemenation for supporting multiple pack repositories#126
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zhubonan wants to merge 6 commits into
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Proof-of-concept implemenation for supporting multiple pack repositories#126zhubonan wants to merge 6 commits into
zhubonan wants to merge 6 commits into
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Since pack can sit in the additional folder, it no longer make sense to get the path of a repack soley from the pack_id. Path to the repack file must be obtained by giving the pack_id itself. This ensures that the repack file sit on the same filessytem as the pack that is being repacked, and allow safe handling at the end using hard link.
zhubonan
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@@ Coverage Diff @@
## develop #126 +/- ##
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- Coverage 99.52% 98.79% -0.74%
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Files 8 8
Lines 1675 1736 +61
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+ Hits 1667 1715 +48
- Misses 8 21 +13
Continue to review full report at Codecov.
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close since it is superseded by #133 |
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This PR allows the packs to be stored in additional locations (pack repositories) other than the main object store folder.
The main reason for allowing this is allow packs to be moved to different file systems (slow but spacious ones) to free up spaces in the main filesystem (usually on a SSD), in case of growing demand of storage space.
Packing loose objects and writing directly to the packs will only take place on the main storage to avoid any performance impact.
One exception is when repacking - this will be done directly inside the pack repository (on the same filesytem as the pack file to be repacked). This means there is no longer a single path for temporaray pack that is used for repacking (previously pack_id=-1), as its path on the file system now depends on the id of the pack that is being repacked.
The user is resposible for moving the packs, ideally when the repository is fully "offline". Online operation is still possible, but requires a sequence of copy-rename-unlink operations.
Todos: