On Nov 16, 2007, at 5:26 AM, Al Hopper wrote:
> I have a question(s) - and maybe I have not had enough coffee this
> morning - but I'm having difficulty seeing how COMSTAR should be
> used in terms of the big systems architecture picture. What problem
> (s) does is solve? How do you foresee it being deployed.
COMSTAR is an advanced software stack to use a Solaris host as a
multi-protocol SCSI target. It hides the complexities of a SCSI
subsystem and makes it very easy to develop any SCSI logical unit
emulation (disk, tape etc.) or a SCSI transport (Fibre channel,
iSCSI, SAS etc.). You can use LUN mapping and masking operations to
export a given logical unit across different protocols (or however
you want to map it).
COMSTAR is not a definition of any SCSI application or its
architecture. Just like the initiator side storage stack on solaris
(target drivers + (SCSA & MPxIO) + transports) does not define how
you want to lay out your SAN or SAN application or the networking
socket layer does not define how the network application should be
architected.
> How does it differ from iSCSI. How does it compare to iSCSI etc.
> In other words: what it the big picture from a system builders
> perspective.
If you refer to the diagram on the main page, iSCSI is simply one
of the port providers.
Thanks
Sumit
>
> Thanks,
>
> Al Hopper Logical Approach Inc, Plano, TX. [EMAIL PROTECTED]
> Voice: 972.379.2133 Fax: 972.379.2134 Timezone: US CDT
> OpenSolaris Governing Board (OGB) Member - Apr 2005 to Mar 2007
> http://www.opensolaris.org/os/community/ogb/ogb_2005-2007/
> Graduate from "sugar-coating school"? Sorry - I never attended! :)
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