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0001 # Parameter Changes
0002
0003 This guide outlines the key parameter changes from JANA1 to JANA2, helping you adjust your configurations and usage as needed.
0004
0005 ### Loading Configuration
0006
0007 - **JANA1:** hd_root `--config=my_file.config` input.evio
0008 - **JANA2:** hd_root `--loadconfigs my_file.config` input.evio
0009
0010 ### Commonly Used JANA Parameters
0011
0012 The following table compares commonly used JANA parameters between JANA1 and JANA2. Parameters that remain unchanged in JANA2 are marked with `-`. In the "Possible Input" column, `-` means that they are the same as in JANA1. Changes are listed where applicable.
0013
0014 | **Parameter** | **JANA1** | **JANA2** | **Possible Inputs** |
0015 |-----------------------|------------------------|------------------------------|--------------------------------------------------|
0016 | **PLUGINS** | `- ` | `-` | `-` |
0017 | **EVENTS_TO_KEEP** | `EVENTS_TO_KEEP` | `jana:nevents` | `-` |
0018 | **EVENTS_TO_SKIP** | `EVENTS_TO_SKIP` | `jana:nskip` | `-` |
0019 | **NTHREADS** | `-` | `-` | `-` |
0020 | **JANA:BATCH_MODE** | `JANA:BATCH_MODE` | `jana:global_loglevel` | `TRACE`, `DEBUG`, `INFO`, `WARN`, `FATAL`, `OFF` |
0021 | **JANA_CALIB_CONTEXT**| `JANA_CALIB_CONTEXT` | `jana:calib_context` | `-` |
0022
0023 ## Changes in `halld_recon` Parameters
0024
0025 ### `hd_dump` Option Update
0026
0027 - **JANA1:** The `-b` option was used for printing event status bits in `hd_dump`.
0028 - **JANA2:** The `-b` option is used for benchmarking in JANA2. Thus, `hd_dump` parameter for event status bits (`-b`) has been changed to `-B`. Update your usage accordingly.
0029
0030 For additional assistance or questions, please contact [rasool@jlab.org](mailto:rasool@jlab.org).
