Veritas Cluster Server Knowledge Sharing

Ingat ingat lagi, beberapa hal dari Veritas Cluster Server yg mungkin perlu di sharing buat teman teman disini.

Jeopardy Status di Veritas Cluster server saat menjalankan command Gabconfig -a.

apa artinya dan bagaimana kalau terdapat 4 high priority link dan ternyata hanya 1 yang down, apakah dianggap jeopardy juga ?

jawabannya adalah ?

dengan minimal 2 link high priority ter configure dan kalau 1 dari antara ke 2 high priority itu down maka akan didapati status jeopardy. dan jika kita memiliki 4 link high priority dan ternyata 1 down, maka tidak ditemukan node yang berstatus jeopardy, karena masih memiliki 3 high priority link yang notabene itu masih diatas minimum requirement nya.

ini salinan jawaban dari symantec.

jeopardy
The state in which a node is missing one of the two required heartbeat connections. When a node is running with one heartbeat only (in jeopardy), VCS does not restart the applications on a new node. This action of disabling failover is a safety mechanism that prevents data corruption.
A node is in jeopardy when it is missing one of the two required heartbeat connections. When a node is running with one heartbeat only (in jeopardy), VCS does not restart the applications on a new node. This action of disabling failover is a safety mechanism that prevents data corruption.
In VERITAS Cluster Server, a node is defined as being in jeopardy when it is missing one of the two required heartbeat connections. When a node is running with one heartbeat only (in jeopardy), VERITAS Cluster Server does not restart the applications on a new node. This action of disabling failover is a safety mechanism that prevents data corruption.

sebagai tambahan, dibawah ini ada beberapa jenis type port membership di veritas cluster dan keterangannya.

GAB Port Memberships
====================================
Port a gen 4a1c0001 membership 01
Port b gen g8ty0002 membership 01
Port d gen 40100001 membership 01
Port f gen f1990002 membership 01
Port h gen d8850002 membership 01
Port o gen f1100002 membership 01
Port q gen 28d10002 membership 01
Port v gen 1fc60002 membership 01
Port w gen 15ba0002 membership 01

Port Function
a gab driver
b I/O fencing (designed to guarantee data integrity)
d ODM (Oracle Disk Manager)
f CFS (Cluster File System)
h VCS (VERITAS Cluster Server: high availability daemon)
o VCSMM driver (kernel module needed for Oracle and VCS interface)
q QuickLog daemon
v CVM (Cluster Volume Manager)
w vxconfigd (module for cvm)

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