|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] iSCSI: rev07 - ISID-TSID & naming commentsJulian, Some comments in this area. - Section 2.10.6, last sentence in para 1 states "An initiator is uniquely identified by the value pair (InitiatorName, ISID).". Suggest s/b "initiator" with "initiator SCSI port". - Section 2.11.4, first sentence. "The TSID is an initiator identifying tag set by the target." s/b with "The TSID is a target-defined tag assigned to an initiator SCSI port.". - Section 1.5, para 1, "Network portals (IP names, addresses and TCP ports)" Suggest dropping "IP names" since what really matters is just the IP addresses and TCP ports. IIRC, two DNS names can resolve to the same IP address, and one DNS name can resolve to multiple IP addresses. - The section in general is not consistent in the usage of iSCSI Name. It uses "iSCSI name" "iSCSI Node name", and "iSCSI Name". I would suggest using a consistent phrase wherever iSCSI-defined Names are used, like "iSCSI-Name". Simlar comments apply for "Network Portal". - Section 1.5.1, description for "Network Entity" has "This device or gateway may support one or more iSCSI Node" s/b with "This device or gateway may support one or more iSCSI Nodes and one or more Network Portals". Similarly for "The iSCSI Node is accessed via a network portal", s/b with "The iSCSI Node is accessed via one or more network portals". - Section 1.5.1, description for "iSCSI Node". The reasoning offered for the definition for iSCSI-Names is not quite right. Suggested sentence "iSCSI-Names are required because multiple iSCSI Nodes may be present behind a given combination of IP address and TCP port.". - Section 1.5.1, second para under "iSCSI Node" discussion, first sentence. This states that names are not required for default node access. Is this still true? I thought we are mandating InitiatorName and TargetName text key exchange now. - Section 1.5.1, description for "Network Portal". Suggest rewording the very first sentence to include the last sentence. The current first sentence appears very vague ("port" - TCP/SCSI/ethernet?). Also the last sentence defines a network portal for a target to comprise the "listening TCP port", should we identify what it is for an initiator? - The picture shown at the beginning of section 1.5 does not show TCP port being part of the Network Portal on the initiator side. Is it then implied that only the IP address constitues a Network Portal for an initiator iSCSI Node? - Section 1.5.2, last para. This defines the I-T nexus as the session for iSCSI. This doesn't suggest a nexus identifier - is it the four tuple <InitiatorName, ISID, TargetName, portal group tag> or the SSID <ISID, TSID>? Or is it both - the four-tuple being nexus id at the SCSI layer, and the latter at the iSCSI layer? - Section 1.5.3, second para with the ISID RULE, last sentence. Suggest "...nor does it preclude other sessions with different ...." s/b with "...nor does it preclude multiple sessions with different....". - Section 1.5.3, third para. This mentions the term "parallel nexus". I assume the equivalence of two 4-tuples is what is being implied here. Unless this term is already defined in some latest SCSI documents, I suggest defining this as such. - Section 1.5.2 does not comment on if iSCSI mandates the support of SCSI Port names for iSCSI initiators (the requirement appears only the iSCSI targets para). I assume it is mandatory. - The following initiator requirement: "The iSCSI Name should be configurable parameter of each initiator portal group." would be more clear if stated as (if this is a correct interpretation): "All the initiator portal groups of one iSCSI Node MUST share the same iSCSI-Node name." Similar comments apply for the target requirement. - The following initiator requirement: "The ISID name space of the iSCSI Initiator should be partitioned among the initiator portal groups." would be better stated as (if this is a correct interpretation): "All initiator portal groups of one iSCSI Node MUST share an ISID name space for sessions established to one iSCSI target node. Sessions established to multiple iSCSI target nodes MAY share one ISID name space." - The following target requirement: "The TSID name space of the iSCSI Target should be partitioned among the target portal groups." would be better stated as (if this is a correct interpretation): "All target portal groups of one iSCSI Node MUST share an TSID name space for sessions established to one iSCSI initiator node. Sessions established to multiple iSCSI initiator nodes MAY share one TSID name space." -- Mallikarjun Mallikarjun Chadalapaka Networked Storage Architecture Network Storage Solutions Organization MS 5668 Hewlett-Packard, Roseville. cbm@rose.hp.com
Home Last updated: Tue Sep 04 01:04:02 2001 6315 messages in chronological order |