topic Re: cluster in Operating System - HP-UX

cluster

Anjaneyulu — Fri, 21 Nov 2008 14:34:55 GMT

Hi,

How can I findout the my server is the as part of the cluster?

Re: cluster

Prashanth Waugh — Fri, 21 Nov 2008 14:48:15 GMT

Hi,

U can check using
#cmviewcl

or
ps -ef | grep cmcld

Regards
Prashnat

Re: cluster

Yashwant — Fri, 21 Nov 2008 14:48:41 GMT

run following command

cmviewcl -v

cmviewcl -v command shows status for the cluster

Re: cluster

Johnson Punniyalingam — Fri, 21 Nov 2008 14:53:59 GMT

# cmviewcl

# cmviewcl -v --> verbose output which gives detail report of the Cluster

# ps -ef |grep cmcld --> cluster deamon process

Thanks,
Johnson

Re: cluster

Anjaneyulu — Fri, 21 Nov 2008 14:55:09 GMT

I ran "ps -ef|grep cmcld". There is no processer running.

I want to know one thing What is the difference between cluster and normal server.

I want to know about LUN disks. what are the advantage of LUN disks?

Re: cluster

Prashanth Waugh — Fri, 21 Nov 2008 14:57:34 GMT

Hi,
A Serviceguard cluster is a networked grouping of HP9000 or HP Integrity servers (this
host systems are called â nodesâ ) having sufficient redundancy of software and hardware
to avoid a single point of failure (SPOF) and service disruption.

Reagrds
Prashant

Re: cluster

Prashanth Waugh — Fri, 21 Nov 2008 15:01:04 GMT

Hi ,

At storage level
lun means of bunch of physical disk.
physical disks are grouped togeter using raid technology. but server point of view we can treat as a physical volume (PV)

Regards
Prashant

Re: cluster

Johnson Punniyalingam — Fri, 21 Nov 2008 15:03:47 GMT

I ran "ps -ef|grep cmcld". There is no processer running.
>>>(It means you server not part of Cluster)<<<

I want to know one thing What is the difference between cluster

two or more server join to gether form a Cluster

1. why join --> to avoid any SPOF -> Single point of Failures,

(example "you have Database Server running and you buisness is very critcal and you d'not offered any down-time for your buisness) so we can step a Cluster "Server"

and normal server.

(Its normal ,like standalone Server / indepentant Server,

I want to know about LUN disks.

>>(Collection / Groups of Pshyical Volume / Harddisk" form a LUN,

what are the advantage of LUN disks?
1. Use for RAID technologies
2. better I/O permformance
3. Realiable - LUN Disks
4. Can avoid Many SPOF -- like disk failures , Controller failures, but still you can have data access to Alternative disk

Thanks,
Johnson

Re: cluster

ARCHITECT_1 — Sat, 22 Nov 2008 09:24:11 GMT

hi

#cmviewcl -v ---- view running cluster

#ps -ef |grep -i cmcld -checking cluster deamon