AWS parallelcluster documentation change
Summary
Improved grammatical structure and consistency in documentation about cluster management processes. Changes include rephrasing for clarity, using active voice, and standardizing terminology related to Slurm/Batch integration and daemon operations.
Security assessment
Changes are grammatical improvements and documentation clarifications without any mention of security vulnerabilities, patches, or new security features. Updates focus on operational processes rather than security controls.
Diff
diff --git a/parallelcluster/latest/ug/processes-v3.md b/parallelcluster/latest/ug/processes-v3.md index a92711b63..6b8f84da1 100644 --- a//parallelcluster/latest/ug/processes-v3.md +++ b//parallelcluster/latest/ug/processes-v3.md @@ -9 +9 @@ clustermgtdclusterstatusmgtdcomputemgtd -This section applies to clusters that are deployed with Slurm. When used with this scheduler, AWS ParallelCluster manages compute node provisioning and removal by interacting with the underlying job scheduler. +This section applies to clusters that are deployed with Slurm. When used with this scheduler, AWS ParallelCluster interacts with the underlying job scheduler to manage compute node provisioning and removal. @@ -11 +11 @@ This section applies to clusters that are deployed with Slurm. When used with th -For HPC clusters that are based on AWS Batch, AWS ParallelCluster relies on the capabilities provided by the AWS Batch for the compute node management. +For HPC clusters that are based on AWS Batch, AWS ParallelCluster relies on the capabilities provided by AWS Batch to manage compute nodes. @@ -15 +15 @@ For HPC clusters that are based on AWS Batch, AWS ParallelCluster relies on the -The following tasks are performed by the cluster management daemon. +The cluster management daemon (`clustermgtd`) performs these tasks: @@ -17 +17 @@ The following tasks are performed by the cluster management daemon. - * Inactive partition clean-up + * Clean up inactive partitions @@ -19 +19 @@ The following tasks are performed by the cluster management daemon. - * Management of Slurm reservations and nodes associated to Capacity Blocks (see following section) + * Manage Slurm reservations and nodes associated with Capacity Blocks (see the following section) @@ -21 +21 @@ The following tasks are performed by the cluster management daemon. - * Static capacity management: make sure static capacity is always up and healthy + * Manage static capacity to make sure it is always up and healthy @@ -25 +25 @@ The following tasks are performed by the cluster management daemon. - * Orphaned instance clean-up + * Clean up orphaned instances @@ -29 +29 @@ The following tasks are performed by the cluster management daemon. - * Unhealthy Amazon EC2 instances management (failing Amazon EC2 health checks) + * Manage unhealthy Amazon EC2 instances (those that fail Amazon EC2 health checks) @@ -31 +31 @@ The following tasks are performed by the cluster management daemon. - * Scheduled maintenance events management + * Manage scheduled maintenance events @@ -33 +33 @@ The following tasks are performed by the cluster management daemon. - * Unhealthy Scheduler nodes management (failing Scheduler health checks) + * Manage unhealthy scheduler nodes (those that fail scheduler health checks) @@ -38 +38 @@ The following tasks are performed by the cluster management daemon. -### Management of Slurm reservations and nodes associated to Capacity Blocks +### Management of Slurm reservations and nodes associated with Capacity Blocks @@ -42 +42 @@ ParallelCluster supports On-Demand Capacity Reservations (ODCR) and Capacity Blo -Clustermgtd searches for unhealthy nodes in a loop and terminates any Amazon EC2 instances that are down, replacing them with new instances if they are static nodes. +`clustermgtd` searches for unhealthy nodes in a loop, terminates any Amazon EC2 instances that are down, and replaces them with new instances if they are static nodes. @@ -44 +44 @@ Clustermgtd searches for unhealthy nodes in a loop and terminates any Amazon EC2 -ParallelCluster manages static nodes associated with Capacity Blocks differently. AWS ParallelCluster creates a cluster even if the CB is not yet active, and instances are launched automatically once the CB is active. +AWS ParallelCluster manages static nodes associated with Capacity Blocks differently– it creates a cluster even if the CB is not yet active, and automatically launches instances once the CB is active. @@ -46 +46 @@ ParallelCluster manages static nodes associated with Capacity Blocks differently -The Slurm nodes corresponding to compute resources associated with CBs that are not yet active are kept in maintenance until the CB start time is reached. Slurm nodes will remain in a reservation/maintenance state associated with the Slurm admin user, which means they can accept jobs, but jobs will remain in pending until the Slurm reservation is removed. +The Slurm nodes that correspond to compute resources associated with CBs that are not yet active are kept in the maintenance state until the CB start time is reached. These Slurm nodes remain in a reservation/maintenance state associated with the Slurm admin user, which means they can accept jobs, but the jobs remain pending until the Slurm reservation is removed. @@ -48 +48 @@ The Slurm nodes corresponding to compute resources associated with CBs that are -Clustermgtd will automatically create/delete Slurm reservations, putting the related CB nodes in maintenance based on the CB state. When CB will be active, Slurm reservation will be removed, nodes will start and will become available for the pending jobs or for new jobs submissions. +`clustermgtd` automatically creates or deletes Slurm reservations– it puts the related CB nodes in a maintenance state based on the CB state. When the CB becomes active, the Slurm reservation is removed, the nodes start and become available for the pending jobs or for new job submissions. @@ -50 +50 @@ Clustermgtd will automatically create/delete Slurm reservations, putting the rel -When the CB end time is reached, nodes will be moved back to a reservation/maintenance state. It's up to users to resubmit/requeue the jobs to a new queue/compute-resource when CB is no longer active and instances are terminated. +When the CB end time is reached, the nodes are moved back to a reservation/maintenance state. It's up to users to resubmit/requeue the jobs to a new queue/compute resource when the CB is no longer active and instances are terminated. @@ -54 +54 @@ When the CB end time is reached, nodes will be moved back to a reservation/maint -The cluster status management daemon manages the compute fleet status update. Every minute it fetches the fleet status stored in a DynamoDB table and manages any STOP/START request. +The cluster status management daemon (`clusterstatusmgtd`) manages the compute fleet status update. Every minute it fetches the fleet status stored in a DynamoDB table and manages any STOP/START request. @@ -58 +58 @@ The cluster status management daemon manages the compute fleet status update. Ev -Compute management daemon (`computemgtd`) processes run on each of the cluster compute nodes. Every five (5) minutes, the compute management daemon confirms that the head node can be reached and is healthy. If five (5) minutes pass during which the head node cannot be reached or is not healthy, the compute node is shut down. +The compute management daemon (`computemgtd`) processes run on each of the cluster compute nodes. Every five (5) minutes, the compute management daemon confirms that the head node can be reached and is healthy. If five (5) minutes pass during which the head node cannot be reached or is not healthy, the compute node is shut down.