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Control Plane Vs Everything You Wanted To Know about Storage (But Were Too Proud To Ask) Part Mauve J Metz, Cisco Dror Goldenberg, Mellanox Chad Hintz, Cisco Fred Knight, NetApp November 1, 2016 Today’s Presenters J Metz Dror Goldenberg Chad Hintz Fred Knight SNIA Board VP Software SNIA-ESF Standards of Directors Architecture Board Technologist Cisco Mellanox Cisco NetApp 2 SNIA Legal Notice ! " The material contained in this presentation is copyrighted by the SNIA unless otherwise noted. ! " Member companies and individual members may use this material in presentations and literature under the following conditions: ! " Any slide or slides used must be reproduced in their entirety without modification ! " The SNIA must be acknowledged as the source of any material used in the body of any document containing material from these presentations. ! " This presentation is a project of the SNIA. ! " Neither the author nor the presenter is an attorney and nothing in this presentation is intended to be, or should be construed as legal advice or an opinion of counsel. If you need legal advice or a legal opinion please contact your attorney. ! " The information presented herein represents the author's personal opinion and current understanding of the relevant issues involved. The author, the presenter, and the SNIA do not assume any responsibility or liability for damages arising out of any reliance on or use of this information. NO WARRANTIES, EXPRESS OR IMPLIED. USE AT YOUR OWN RISK. 3 About SNIA 4 Agenda ! " Channel vs. Bus Host Network Storage ! " Control Plane vs. Data Plane ! " Fabric vs. Network Channel Busses Control Plane Data Plane Fabric Network 5 Off We Go! ! " Channel vs. Bus ! " Control Plane vs. Data Plane ! " Fabric vs. Network 6 Bus vs. Channel Bus Channel Transfers multiple signals Physical or logical data simultaneously communication line 7 Get On The Bus ! " Communication system that transfers multiple signals simultaneously between components ! " Control bus – send commands ! " Data bus – move data ! " Address bus – tell me where to find it ! " Power bus – shock it to me! ! " The bus can be… ! " Shared or point to point ! " Parallel or serial ! " Internal or external 8 Busses in a Server Memory Bus Cache Coherency Memory Bus DDR4 Bus DDR4 Peripheral Bus PCIe Storage Bus SATA/SAS PCI Chipset Switch Peripheral Bus SMBus/ PCIe i2c NVMe 9 Get On The Bus ! " Common bus examples ! " Motherboard: PCIe (devices), DDR4 (memory), AGP (graphics) ! " Storage: SCSI, SATA, SAS 2 ! " Peripherals: USB, Lightning, FireWire, Thunderbolt, i c/smbus ! " What is not a bus? ! " Ethernet, Fibre Channel, InfiniBand ! " These are networks & fabrics 10 Faster Bus Performance ! " Faster data transfer on each lane ! " Higher frequencies (faster signal transfer rate) ! " More data per message (efficient encoding) ! " More lanes in parallel 11 Channel Details ! " Path for transferring data ! " Physical—Wire, fiber or board trace ! " Logical—Digital TV channel; VPN link ! " Mainframe channel subsystem (CSS) ! " SSD/DRAM data transfer path ! " Physical, electronic, or logical separation ! " Different wires/fibers ! " Different frequencies, multiplexing 12 More About Channels ! " Channel vs. bus? ! " Bus can be comprised of multiple physical channels (a.k.a. lanes) ! " Logical channels can operate over a bus or network ! " Channel vs. lane? ! " Can be synonymous, i.e. “Channel” = “Lane” ! " Or one channel can have multiple lanes 13 Bus vs. Network ! " Bus ! " Network ! " Inside box ! " Outside the box ! " Short distances ! " Longer distances ! " Shared / point-to-point links ! " Usually point-to-point links ! " Not typically shared by multiple ! " Shared by multiple systems systems ! " Byte/LBA addressing typically ! " L2/3 addressing typically Both Bus and Network can use multiple channels! 14 Network – IB/Eth/FC Processor Processor Node Node Network Consoles Switch Processor Switch Node Switch Switch Storage RAID Subsystem 15 Bus v Channel - Summary ! " A bus is a topology of interconnected devices ! " A channel is a dedicated path for traffic that can sit upon a topology 16 Next Up… ! " Channel vs. Bus ! " Control Plane vs. Data Plane ! " Fabric vs. Network 17 Control Plane vs. Data Plane Control Plane Data Plane The Plan The Movement 18 Network Centric 19 Where are we going? Control Plane- Network Centric ! " Networking (SAN or Data Networks) devices use the control plane to: ! " Learn which paths are available !" Using static configuration (static routes-data networks) or via learning (routing protocols SAN or Data) ! " Figure out the best path(s) and tell the data plane !" Any packet the device has to fully process (routing protocols, bpdu, SSH/Telnet) 20 I know where to GO, Jump on! Data Plane ! " Networking devices use the data plane to: ! " Transmit or Move the traffic from one interface to another based on what we have learned from the Control Plane 21 Storage Centric 22 Storage Control/Data Plane 23 Traditional Storage Control Plane and Data Plane together in one unit 24 Where are we going? Control Plane- Storage Centric 25 Hyper-Converged Centric 26 Hyper-convergence-Control Plane Centralized Controller VM VM VM VM ! Centralized Control Plane Hypervisor ! Tight integration of x86 Local Physical Storage servers for compute and Controller VM VM VM storage, networking and VM virtualization in all-in-one Hypervisor appliance. Local Physical Storage Controller VM VM VM VM Hypervisor Local Physical Storage Data v. Control Planes - Summary ! " A Data Plane is the path by which data is moved from device to device ! " A Control Plane is the path by which the management of that data plane is transmitted 28 Last But Not Least… ! " Channel vs. Bus ! " Control Plane vs. Data Plane ! " Fabric vs. Network 29 What is a Network ! " Definition ! " SNIA: An interconnect that enables communication among a collection of attached nodes, consisting of optical, electrical, or wireless transmission media, infrastructure in the form of hubs, switches, and/or routers, and protocols that make message sequences meaningful. ! " The Internet is the most famous Network. 30 Typical Network 31 Typical Network LAN WAN 32 What is a Fabric ! " Definition: ! " A Fabric is specialized type of Network. ! " Wikipedia: Switched Fabric or switching fabric is a network topology in which network nodes interconnect via one or more network switches (including crossbar switches). Because a switched fabric network spreads network traffic across multiple physical links, it yields higher total throughput than broadcast networks, such as early Ethernet. 33 Typical Computer Fabric ! " It’s a fabric, what kind of fabric? 34 Typical Computer Fabric ! " This one is a tight, mesh fabric 35 Typical SAN Fabric 36 Wire vs. Protocol ! " Network ! " Ethernet (copper, optical, wireless) – IEEE 802.x family ! " Dialup / DSL / Broadband “wires” – ITU + others ! " TCP, IP, + lots more protocol - IETF ! " Fabric ! Fibre Channel wire (copper, optical) ! " InfiniBand wire (copper, optical) ! Fibre Channel protocol – INCITS T11 family ! " InfiniBand protocol – IBTA 37 Wire vs. Protocol Network / Fabric Protocols Media Governing Type Body Ethernet TCP / IP (1) Copper, Optical, IEEE 802.x (2) Wireless IETF Dialup / DSL / TCP / IP (1) Copper, Optical ITU + others FIOS / Broadband Fibre Channel FC (FC-SW, FC-GS, etc) Copper, Optical INCITS T11 (2) InfiniBand IB Copper, Optical IBTA (2) (1) POP, HTTP, iSCSI, DHCP, DNS, etc (2) Optical Internetworking Forum (OIF) defines optical cable standards 38 Connected Fabrics Network Fabric Domain 1 Fabric Domain 2 39 Key thoughts ! " Generally speaking: ! " Networks are thought of as larger entities (WWW) ! " Fabrics are thought of as smaller more specialized entities ! " LAN = Local Area Network (office/campus) ! " WAN = Wide Area Network (internet) ! " SAN = Storage Area Network (FC) ! " Specialized for storage ! iSAN = Storage Area Network (iSCSI) 40 Ethernet / FC differences ! " Generally speaking: ! " Ethernet: More loosely coupled - network switches have less knowledge !" Lots of end points that talk to each other !" Next hop routing (IS-IS, OSPF, BGP, EIGRP) !" Destination based flow control (backpressure) !" Higher layer corrects for packet loss ! Fibre Channel: More tightly coupled - fabric switches have more knowledge !" Initiators talk to targets !" Distributed routing knowledge (FSPF) !" Source based flow control (credits) !" Virtually lossless 41 Fabric v. Network - Summary ! " Networks make up a series of interconnected devices and can consist of multiple topologies ! " Fabrics are a type of network with distributed intelligence across all devices 42 Summary ! " Channel vs. Bus Host Network Storage ! " Control Plane vs. Data Plane ! " Fabric vs. Network Channel Busses Control Plane Data Plane Fabric Network 43 Summary ! " Channel vs. Bus ! " A bus is a topology of interconnected devices ! " A channel is a dedicated path for traffic that can sit upon a topology ! " Control Plane vs. Data Plane ! " A Data Plane is the path by which data is moved from device to device ! " A Control Plane is the path by which the management of that data plane is transmitted ! " Fabric vs. Network ! " Networks make up a series of interconnected devices and can consist of multiple topologies ! " Fabrics are a type of network with distributed intelligence across all devices 44 Other Storage Terms Got Your Pride? This is a Series! ! " Check out – Chartreuse https://www.brighttalk.com/webcast/663/215131 ! " The Basics: Initiator, Target, Storage Controller, RAID. Volume Manager and more ! "
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