xrootd: implement prepare function - #8198
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Motivation: ----------- dCache XRootD never implemented the prepare XRootD protocol call. In the beginning it returned an OK w/o doing anything and recently was implemented to fail with "unsupported". Meanwhile some customers (like the ALICE experiment) have to rely on this function to actually stage files. Modification: ------------ Implemented the prepare function. Regular CUSTODIAL files are staged and pinned via a new pin manager stub, using a configurable pin lifetime (xrootd.pin.lifetime[.unit], default 12 hours). REPLICA and OUTPUT files, as well as non-regular files (directories, links), are ignored for efficiency. Evict/cancel requests release the pin via the same stub. Conflicting option combinations (e.g. stage together with evict/cancel) are rejected with an error. New configuration properties were added to configure the pin manager cell stub (xrootd.service.pinmanager[.timeout[.unit]]) and the pin lifetime. The xrootd4j library dependency was bumped to 4.6.3 to pick up the required Prepare protocol message support. Result: ------ Implemented ability to stage and release files via xrootd prepare call. Target: trunk Request: 12.x Issue: #8121 Require-book: no Require-notes: yes Patch: https://rb.dcache.org/r/14770/ Acked-by: Tigran
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Motivation:
dCache XRootD never implemented the prepare XRootD protocol call. In the beginning it returned an OK w/o doing anything and recently was implemented to fail with "unsupported". Meanwhile some customers (like the ALICE experiment) have to rely on this function to actually stage files.
Modification:
Implemented the prepare function. Regular CUSTODIAL files are staged and pinned via a new pin manager stub, using a configurable pin lifetime (xrootd.pin.lifetime[.unit], default 12 hours). REPLICA and OUTPUT files, as well as non-regular files (directories, links), are ignored for efficiency. Evict/cancel requests release the pin via the same stub. Conflicting option combinations (e.g. stage together with evict/cancel) are rejected with an error.
New configuration properties were added to configure the pin manager cell stub (xrootd.service.pinmanager[.timeout[.unit]]) and the pin lifetime. The xrootd4j library dependency was bumped to 4.6.3 to pick up the required Prepare protocol message support.
Result:
Implemented ability to stage and release files via xrootd prepare call.
Target: trunk
Request: 12.x
Issue: #8121
Require-book: no
Require-notes: yes
Patch: https://rb.dcache.org/r/14770/
Acked-by: Tigran