pool: New hotfile show command, and show enablement status with info -a

[greenc-FNAL]

Motivation:

It is desirable to have a single admin command to display the values of both hot-file migration parameters (replicas and threshold).

It is also desirable to see quickly whether the hot file migration facility is enabled on a given pool.

Modification:

• The addition of a pool command hotfile show to MigrationModule
• The hot file replication enablement status has been added to the pool section of info -a

Result:

• hotfile show

  replicas=3  threshold=5
  

• info -a

  …
  --- pool (Main pool component) ---
  Base directory       : /diska/rw-pool-1
  Version              : 12.0.0-SNAPSHOT(bddeaa4) (Sub=4)
  Report remove        : ON
  Pool Mode            : enabled
  Hsm Load Suppression : OFF
  Ping Heartbeat       : 30 seconds
  Breakeven            : 0.7
  LargeFileStore       : NONE
  P2P File Mode        : CACHED
  Hot File Replication : ON
  Mover Queue (DCap) 0(100)/0
  Mover Queue (FTP) 0(30)/0
  Mover Queue (TPC) 0(1000)/0
  Mover Queue (XRootD) 0(1000)/0
  Mover Queue (HTTP) 0(1000)/0
  Mover Queue (NFS) 0(1000)/0
  Mover Queue (regular) 0(1000)/0
  Mover Queue (CVMFS) 0(10000)/0
  …
  

Acked-by: Dmitry Litvintsev
Patch: https://rb.dcache.org/r/14640/diff/raw
Commit:
Target: master
Request: 11.2
Require-book: no
Require-notes: yes

[Copilot]

Pull request overview

Adds improved admin visibility into hot-file replication by introducing a consolidated hotfile show command and surfacing hot-file replication enablement in info -a pool details.

Changes:

• Added hotfile show admin command to display hot-file replication parameters (replicas, threshold).
• Extended pool “details” output (info -a) to include “Hot File Replication : ON|OFF”.
• Added a unit test to verify the pool details output includes the hot-file replication status line.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
modules/dcache/src/main/java/org/dcache/pool/migration/MigrationModule.java	Adds hotfile show command to display hot-file replication parameters.
modules/dcache/src/main/java/org/dcache/pool/json/PoolDataDetails.java	Adds hot-file replication enabled flag and prints it in pool details output (plus aligns labels).
modules/dcache/src/main/java/org/dcache/pool/classic/PoolV4.java	Populates PoolDataDetails with the pool’s hot-file replication enablement state.
modules/dcache/src/test/java/org/dcache/pool/json/PoolDataDetailsTest.java	New test verifying the printed pool details includes hot-file replication status.