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Re: [Linux-cluster] GFS questions to have a final decision



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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