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