# 101: Interactive jobs with Slurm You can use `salloc` to allocate resources in real-time to run an interactive batch job. Typically this is used to allocate resources and spawn a shell. The shell is then used to execute `srun` commands to launch parallel tasks. Interactive job is useful for tasks including data exploration, development, or (with X11 forwarding) visualization activities. The maximum walltime depends on the [QoS](/slurm/slurm-qos-and-partition.md) you have used. For worker nodes with CPU and GPU: ``` salloc --qos=cu_hpc --partition=cpugpu ``` For worker nodes with CPU-only: ``` salloc --qos=cu_hpc --partition=cpu ``` After connection, you will get the message like ``` salloc: Granted job allocation 82025 salloc: Waiting for resource configuration salloc: Nodes cpu-bladeh-01 are ready for job ``` and with `squeue -u your_user_name`, you will see ``` JOBID PARTITION NAME USER ST TIME NODES NODELIST(REASON) 82025 cpu interact your_user_name R 1:59 1 cpu-bladeh-01 ``` To run, you can use `srun`, e.g. ``` [your_user_name@frontend-02 ~]$ srun hostname cpu-bladeh-01.stg ``` To exit the interactive mode, you can use the command `exit` ``` [your_user_name@frontend-02 ~]$ exit exit salloc: Relinquishing job allocation 82025 ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://esciencecu-twiki.sc.chula.ac.th/slurm/101-interactive-jobs-with-slurm.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.