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4 replies Latest Post - ‏2012-01-02T13:38:45Z by PrabhanjanG
xf00657
xf00657
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Pinned topic SCSI tie breaker on SUN Solaris

‏2011-12-01T09:42:04Z |
Hello,

our SUN people are not very happy on how TSAMP handles Quorum Support. In our case we use network tiebreaker but this isn't a sure method because both sub clusters can still reach the defined gateway IP. Now we are in discussion about using SCSI tiebreaker instead. They want to know which type of SCSI-reservation is supported by the IBM.TieBreaker class? And is it possible to provide more and deeper information on how it works?

kind Regards
Rüdiger
Updated on 2012-01-02T13:38:45Z at 2012-01-02T13:38:45Z by PrabhanjanG
  • Enrico_Joedecke
    Enrico_Joedecke
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    Re: SCSI tie breaker on SUN Solaris

    ‏2011-12-05T15:44:55Z  in response to xf00657
    Hello,

    the SCSI tie breakers use SCSI-2 reservation only. This is also stated within the SA MP Administrators and Users guide.

    Enrico Joedecke
    • xf00657
      xf00657
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      Re: SCSI tie breaker on SUN Solaris

      ‏2011-12-07T09:43:42Z  in response to Enrico_Joedecke
      ok, I found it. But I was not sure if it is for all platforms the same.
      Ruediger Dahlke
      • Enrico_Joedecke
        Enrico_Joedecke
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        Re: SCSI tie breaker on SUN Solaris

        ‏2011-12-07T10:11:44Z  in response to xf00657
        Hello,

        yes, the usage of SCSI-2 reservation applies to all SCSI tie breakers.

        In my first reply I forgot to note that there is now an SCSIPR tie breaker available for Linux, which uses SCSI-3 reservation, but this is not available for Solaris. The description did not make it into the SA MP 3.2.2 books, so it is so far only contained within the Release Notes of SA MP 3.2.1 / 3.2.2.
        There is also a description how to use SCSI-3 reservation for the AIX 'DISK' tie breaker within the Relase Notes.

        Enrico Joedecke
  • PrabhanjanG
    PrabhanjanG
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    Re: SCSI tie breaker on SUN Solaris

    ‏2012-01-02T13:38:45Z  in response to xf00657
    In a two nodes set-up each with one adapter, would a SCSI Tie Breaker function properly?