STORage Maintenance (storm)

Last modified: 2016-02-24

Chairs:

Transport Area Director

Mailing Lists:

General Discussion: storm@ietf.org
To Subscribe: https://www.ietf.org/mailman/listinfo/storm
Archive: https://mailarchive.ietf.org/arch/browse/storm/

Description of Working Group:

The IETF IPS (IP Storage) and RDDP (Remote Direct Data Placement) working groups have produced a significant number of storage protocols (e.g., iSCSI, iSER and FCIP) for which there is significant usage. The time has come to reflect feedback from implementation and usage into updated RFCs; this work may include:

  • Implementation-driven revisions and updates to existing protocols (i.e., updated RFCs that match the "running code").
  • Interoperability reports as needed for the resulting revised protocols that are appropriate for Draft Standard RFC status.
  • Minor protocol changes or additions. Backwards compatibility is required.

Significant changes to the existing protocol standards are out of scope, including any work on version 2 of any of these protocols. Security for these protocols is based on the functionality specified in RFC 3723 (Securing Block Storage Protocols over IP); the working group does not intend to make major changes or updates to that RFC.

Stability is critical to the usage of these protocols, so backwards compatibility with existing implementations will be a requirement imposed on for all protocol changes and additions. Note that this is a requirement for implementation compatibility - if it is the case that all implementations of a protocol have done something different than what the RFC specifies, it is appropriate for a new RFC to document what the "running code" actually does and deprecate the unused original behavior.

List of work items:

  1. iSCSI: Combine RFCs 3720 (iSCSI), 3980 (NAA names), 4850 (node architecture key) and 5048 (corrections/clarifications) into one draft (3720bis), removing features that are not implemented in practice. This draft should be prepared so that it could become a Draft Standard RFC, but the Working Group has decided not to advance it to Draft Standard status.
  2. iSCSI: Add features to support at least SAM-4 (4th version of the SCSI architecture) in a backwards-compatible fashion, as iSCSI is currently based on SAM-2. This will be a separate draft from the iSCSI update in the previous item. The Working Group may add additional minor useful iSCSI features to this draft, including features from draft versions of SAM-5. The iSCSI MIB (RFC 4544) should be updated to provide SNMP support for new features as appropriate.
  3. FCIP: IP Protocol number 133 was allocated to a precursor of the FCIP protocol in 2000, but this allocated number is not used by FCIP. The Working Group has documented the deployed pre-standard use of this protocol number in RFC 6172, and IANA has updated the registry entry to reference RFC 6172.
  4. iFCP: The Address Translation mode of iFCP needs to be deprecated (SHOULD NOT implement or use), as there are significant technical problems with its specification, and moreover, only the Address Transparent mode of iFCP is in use. This will be done via a short draft that updates RFC 4172, and not via a complete rewrite of RFC 4172. The Working Group has deprecated iFCP Address Translation mode in RFC 6172 and made the corresponding changes to the iFCP MIB (originally RFC 4369) in RFC 6173.
  5. RDDP MPA: Good support for MPI applications requires a small update to the startup functionality to allow either end of the connection to initiate. In addition, a couple of minor changes to RDDP connection setup are needed based on implementation experience.
  6. iSER: Experience with Infiniband implementations suggest a few minor updates to reflect what has been done in practice.
  7. RDMA Protocol: Experience with the rddp (iWARP) RDMA Protocol (RFC 5040) suggests that some minor extensions are needed, specifically, the addition of immediate data support and remote atomic operations.

The Working Group is expected to maintain good working relationships with INCITS Technical Committee T10 (SCSI standards) and INCITS Technical Committee T11 (Fibre Channel standards) via overlaps in membership as opposed to appointment of formal liaisons. The liaison process (including IAB appointment of a liaison or liaisons) remains available for use if needed.

Recent changes in INCITS rules have removed public access to some T10 and T11 standards documents that are expected to be needed for the WG's program of work. Arrangements have been made with T10 and T11 for IETF participants to obtain copies of specific standards their personal use in IETF work as needed; contact the WG chair(s) for details.

Milestones:

Done Submit RDMA Protocol Extensions draft to IESG for consideration as a Standards Track document
draft-ietf-storm-rdmap-ext
Done Working Group Last Call on RDMA Protocol Extensions draft
Done Submit iSER draft to IESG for consideration as a Standards Track document
Done Submit iSCSI MIB draft to IESG for consideration as a Standards Track document
Done Working Group Last Call on iSCSI MIB update draft
Done Submit combined iSCSI draft and iSCSI new features draft to IESG for consideration as Standards Track documents
Done Working Group Last Call on iSER update draft
Done Submit RDDP registries draft to IESG for consideration as a Standards Track document
Done Working Group Last Call on RDDP registries draft
Done First version of iSCSI MIB update draft
Done Working Group Last Call on combined iSCSI draft (3720bis) plus iSCSI SAM-4 (and other) new features draft
Done Working Group decision on whether to seek Draft Standard RFC status for the combined iSCSI draft (3720bis). [Note: decision may be made significantly before this date.]
Done Functionally complete iSCSI SAM-4 (and other) new features draft
Done Working Group Last Call on RDDP MPA startup change draft
Done Working Group Last Call on FCIP protocol number and iFCP address change draft
Done First version of iSER update draft
Done First version of FCIP protocol number and iFCP Address Translation mode draft
Done First version of RDDP MPA startup change draft
Done First version of iSCSI SAM-4 (and other) new features draft
Done First version of combined iSCSI draft (3720bis)

No Internet-Drafts

Request for Comments

 

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