CLCVT Prerequisite Files

Prerequisite files needed to use the Cray Lustre configuration and verification tool (CLCVT).

The clcvt command requires several prerequisite files in order to compute the ip2nets and routes information for the specific configuration. The prerequisite files must be placed in an empty directory on the boot node or SMW, depending on where clcvt will be run.

Deciding how to assign which routers to which object storage servers (OSSs), what fine grained routing (FGR) ratios to use, which interface on which router to use for a Lustre networking (LNet) group, and router placement are all things that can vary greatly from site to site. LNet configuration is determined as the system is ordered and configured. See a Cray representative for the site-specific values. Use Routing and Bandwidth Matching for ClusterStor Systems as a guide.

info.file-system-identifier

A file with global file system information for the cluster-name server machine and each client system that will access it.

client-system.hosts

A file that maps the client system (such as the Cray mainframe) IP addresses to unique host names, such as the boot node /etc/hosts file. The client-system name must match one of the clients in the info.file-system-identifier file.

client-system.ib

A file that maps the client system LNet router InfiniBand IP addresses to system hardware cnames. The client-system name must match one of the clients in the info.file-system-identifier file. This file must be created by an administrator.

clustername.ib

A file that maps the Lustre server InfiniBand IP addresses to cluster (for example, Sonexion) host names. The clustername name must match the clustername in the info.file-system-identifier file. This file must be created by an administrator.

client-system.rtrIm

A file that contains rtr -Im command output (executed on the SMW) for the client-system.