# [OmniOS-discuss] stmfadm add-hg-member -F -g cluster1 wwn.2100001B321EDFB9

Guenther Alka alka at hfg-gmuend.de
Sat Sep 3 11:57:30 UTC 2016

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    You can control access and visibility of LUNs either based on Initiators
    (host groups), targets (target groups), network links (target portal
    groups) or views that make a logical unit visible in a target. Every
    solution works with a different use case idea.

    In napp-it I am currently working on full appliance redundancy with
    Z-Raid pool mirroring over iSCSI for a storage and service failover
    cluster.  I have played with the solutions above but in the end I
    decided to use none of them but use manual target discovery with
    switchable IP aliases for iSCSI targets to restrict and switchover LUNs
    and for NFS/SMB failover between the active master storage appliance and
    the slave. The reason was simplicity and that this works on a lower
    level that does not rely to Comstar timings and delays.

    Gea

    Am 03.09.2016 um 13:05 schrieb Johan Kragsterman:
    > Hi!
    >
    >
    > I'd like to hear from people using omnios as a scsi target appliance, how/if they use host group members in multiple groups, or just in one?
    >
    > The use case for putting a member in multiple(or perhaps just two) host groups, would be a cluster where you can have a host group for the entire cluster, with all members included there, and then individual host groups for each host for os/boot or other private lu's.
    >
    > The other way to do this is of coarse to provide multiple views for the lu's that should be shared across the cluster. IMHO, though, a single cluster host group would be more simple to handle.
    >
    > So, how do YOU do it? And why...?
    >
    > Opinions pls...?
    >
    >
    > Best regards from/Med vänliga hälsningar från
    >
    > Johan Kragsterman
    >
    > Capvert
    >
    > _______________________________________________
    > OmniOS-discuss mailing list
    > OmniOS-discuss at lists.omniti.com
    > http://lists.omniti.com/mailman/listinfo/omnios-discuss

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