CCWG Z. Du Internet-Draft China Mobile Intended status: Informational 17 October 2023 Expires: 19 April 2024 A Framework of Data Express Service draft-du-ccwg-framework-of-data-express-service-00 Abstract This document describes a potential framework for Data Express Service, and related technology requirements. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119]. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on 19 April 2024. Copyright Notice Copyright (c) 2023 IETF Trust and the persons identified as the document authors. All rights reserved. Du Expires 19 April 2024 [Page 1] Internet-Draft Framework of DES October 2023 This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/ license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Requirements of DES . . . . . . . . . . . . . . . . . . . . . 3 3. Framework of DES and Related Technology . . . . . . . . . . . 3 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5 5. Security Considerations . . . . . . . . . . . . . . . . . . . 5 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 5 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 5 7.1. Normative References . . . . . . . . . . . . . . . . . . 5 7.2. Informative References . . . . . . . . . . . . . . . . . 5 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 5 1. Introduction As rapid development of the AI technologies, we need more powerful computing capability. In addition, sharing of the data and computing resource would also be necessary. Under this situation, the network needs to provide Data Express Service (DES) between different entities. The target of the service is normally to transfer a large file or a bundle of files, and the size may be at the GB, TB level, or even bigger. Although we can connect to a cloud service anywhere now, sometimes the file upload experience is not satisfying. Alternatively, we can post a hard disk to others for this big data transferring. However, if the job is repeated, it is surely boring and inconvenient. As the requirements of Data Express Service are growing fast, we need to provide a more convenient approach. The mechanisms in Data Express Service should be more automatic and convenient than the current approaches. Comparing to the approach of transferring by using the Internet directly, the DES should be quicker and automatic. Comparing to the manual hard disk express, the DES should be more extensible and convenient. In details, the DES scenarios may include inter-cloud backup and disaster recovery, film and television editing, scientific computing, cooperation of intelligent computing centers. Du Expires 19 April 2024 [Page 2] Internet-Draft Framework of DES October 2023 This document aims to analyse the requirements of DES, and proposes a potential framework for it. 2. Requirements of DES The demands of the DES traffic would be slightly different from the current Internet services. The first one is that it may be not that real-time. It is only required to be completed within a time limitation. Some may need to be completed within hours, and some may need to be completed within one day or two days. The traffic amount would be huge normally, and the flow would last for a while in the network. It would appear as an elephant flow in the network. Hence, the traffic characteristic of the DES would be more predictable than the current Internet service, and we can provide specific treatment for these traffic. Even, we can schedule the transport time for them, only if we can finish it on-time. In other words, we can store the file waiting to be transported. 3. Framework of DES and Related Technology A framework for DES is proposed in this section as shown in Figure 1. We recognize two network environments in the framework, i.e., the access network and the core network. Traditionally, the client can connecte to the cloud directly. However, due to the complexed E2E network environment, the E2E transport speed sometimes is not satisfying. For the DES, we can split the E2E connection into three parts: from the client to a Data Harbor, among the Data Harbors, and from the Data Harbor to the cloud. The Data Harbors can communicate with each other at a high speed; meanwhile, it can store the files temporarily. Du Expires 19 April 2024 [Page 3] Internet-Draft Framework of DES October 2023 +--------+ +----------+ +--------+ | client |+ | | | |+ +--------+|+ Access | Data | Access | Cloud ||+ +--------+| ------| Harbor1 |------- | ||| +--------+ / | | \ +--------+|| / +----------+ \ +--------+| Core Core +--------+ / \ Access +---------+ +-------------+ | | | | | Data | | Data | | Harbor2 | --------------Core Network---------- | Harbor3 | | | | | +---------+ +-------------+ Access Network Access Network +--------+ +--------+ | client |+ | client |+ +--------+|+ +--------+|+ +--------+| +--------+| +--------+ +--------+ Figure 1: A framework for Data Express Service with Data Harbors As an example, the procedures of the DES service are as follows: Step1: a client connects to an available Data Harbor and uploads its files, if its speed to the target cloud is not satisfying. Meanwhile, the client should provide the time limitation for the files. Step2: the Data Harbors should schedule the transport time for the files according to its time limitation and the link load between target Data Harbors. Step3: after receiving the files, the target Data Harbors should upload the files to the cloud according to its time limitation and the link load between the target Data Harbors and the cloud. If we have many clients that need the DES services, we can built a high speed link between specific Data Harbors. This is the key feature that the DES can be more quick than a normal Internet connection. Under this situation, we also need a high speed transport protocol to transport files efficiently, or more specifically, a specific designed congestion control method for the Data Harbors. The methods mentioned in [I-D.ietf-ccwg-rfc5033bis] can be considered here. Optionally, to improve the speed between the Data Harbors, we can also deploy RDMA mechanisms. Du Expires 19 April 2024 [Page 4] Internet-Draft Framework of DES October 2023 4. IANA Considerations TBD. 5. Security Considerations TBD. 6. Acknowledgements TBD. 7. References 7.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . 7.2. Informative References [I-D.ietf-ccwg-rfc5033bis] Duke, M. and G. Fairhurst, "Specifying New Congestion Control Algorithms", Work in Progress, Internet-Draft, draft-ietf-ccwg-rfc5033bis-01, 13 October 2023, . Author's Address Zongpeng Du China Mobile No.32 XuanWuMen West Street Beijing 100053 China Email: duzongpeng@foxmail.com Du Expires 19 April 2024 [Page 5]