Sun Cluster Cheat Sheet — 1 – www.realsysadmin.com

Cluster Configuration Repository (CCR)

/etc/cluster/ccr (directory)

Important Files

/etc/cluster/ccr/infrastructure

Global Services

One node is to specific global services. All other nodes communicate with the global services (devices, filesystems) via the Cluster interconnect.

Global Naming (DID Devices)

– /dev/did/dsk and /dev/did/rdsk

DID used only for naming globally — not access
DID device names cannot/are not used in VxVM
DID device names are used in Sun/Solaris Volume Manager

Global Devices

provide global access to devices irrespective of there physical location.
Most commonly SDS/SVM/VxVM devices are used as global devices. LVM software is unaware of the implementation of global nature on these devices.

/global/.devices/node@nodeID

nodeID is an integer representing the node in the cluster

Global Filesystems

# mount -o global, logging /dev/vx/dsk/nfsdg/vol01 /global/nfs

or edit the /etc/vfstab file to contain the following:

        /dev/vx/dsk/nfsdg/vol01    /dev/vx/rdsk/nfsdg/vol01    /global/nfs    ufs    2    yes    global,logging

Global Filesystem is also known as (aka) Cluster Filesystem (CFS) or PxFS (Proxy File system)

NOTE: Local failover filesystems (ie. directly attached to a storage device) cannot be used for scalable services — one would have to use global filesystems for it.

Console Software

SUNWccon There are three wariants of the cluster console software:
- cconsole ( access the node consoles through the TC or other remote console access method )
- crlogin (uses rlogin as underlying transport)
- ctelnet (uses telnet as underlying transport)
  /opt/SUNWcluster/bin/ &

Cluster Control Panel

/opt/SUNWcluster/bin/ccp [ clustername ] &

All necessary info for cluster admin is stored in the following two files:

–> /etc/clusters Eg: sc-cluster sc-node1 sc-node2

–> /etc/serialports

        sc-node1 sc-tc 5002             # Connect via TCP port on TC
        sc-node2 sc-tc 5003
        sc-10knode1 sc10k-ssp 23        # connect via E10K SSP
        sc-10knode2 sc10k-ssp 23
        sc-15knode1 sf15k-mainsc 23     # Connect via 15K Main SC
        e250node1 RSCIPnode1 23         # Connect via LAN RSC on a E250
        node1 sc-tp-ws 23               # Connect via a tip launchpad
        sf1_node1 sf1_mainsc 5001       # Connect via passthru on midframe