<P>
IMHO, you don't need a third server just to run the "lock server". You can run the lock server on one of the two nodes... this is the configuration I use: two HP DL380 G3 servers running GFS to simultaneously access MSA 1000... <BR>
<BR>
I dont know whether ML370 is supported by V3...<BR>
<BR>
On Sun, 05 Jun 2005 Yazan Al-Sheyyab wrote :<BR>
>Hello,<BR>
><BR>
> I want to rebuilt our cluster environment again using the newest version of GFS (6) , and<BR>
> I asked a Technical solution provider about that giving him the HardWare i have which is :<BR>
><BR>
>---------------------------------<BR>
> ( HP ML370 G3 ) ( 2 servers ) using an external storage which is<BR>
> ( HP/Compaq MSA500 , SCSI ) and the kind of RHEL OS that wil be<BR>
> run the clusters on is ( ES V3 update 2)<BR>
>---------------------------<BR>
><BR>
> then he answered me the following :<BR>
><BR>
>--------------------------------<BR>
> In your case you will need Three (3) GFS entitlements, One(1) for each<BR>
> Node which makes it two and One (1) for the lock server, in other words<BR>
> you will also need a third server.<BR>
>------------------------------------------------<BR>
><BR>
> and after asking why ---> he answered the following :<BR>
><BR>
>------------------------------------------------------------------------------<BR>
> The hardware you are to use ( HP ML370 G3) is only supported by RHEL<BR>
> V4, and not by RHEL V3<BR>
> - The external storage HP/Compaq MSA500, SCSI is certified.<BR>
> - The lock sever is a system that will be managing access to the shared<BR>
> data, all "writes" to the shared device are controlled by it to avoid<BR>
> file system inconsistency.<BR>
><BR>
> Since there will be many systems accessing the same physical device,<BR>
> there is a need for coordination to avoid overwriting some blocks,<BR>
> hence the need for a lock server.<BR>
>------------------------------------------------------------------------------<BR>
><BR>
><BR>
><BR>
> that was the questions and the answers .<BR>
><BR>
><BR>
> **** and now i just wanted to know IF THIS IS TRUE ?????????<BR>
><BR>
> **** and can i use only one version insted of three for the 2 nodes and the LOCK Server ?<BR>
><BR>
> **** and can i use a software like MC service guard with RedHat as used with the UNIX and HP-UX systems ?<BR>
><BR>
><BR>
> **** any respond please to take the right decision cause i am in a hurry.<BR>
><BR>
><BR>
><BR>
><BR>
><BR>
><BR>
>Regards<BR>
>-------------------------------------------------<BR>
><BR>
>Yazan<BR>
>--<BR>
>Linux-cluster mailing list<BR>
>Linux-cluster@redhat.com<BR>
>http://www.redhat.com/mailman/listinfo/linux-cluster<BR>
</P>
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