Cost Reduction with IP Storage

Transkript

1 Cost Reduction with IP Storage iscsi/tcp/ip SAN iscsi/tcp/ip SAN Fibre Channel SAN Fibre Channel iscsi Gateway iscsi/tcp/ip SAN Fibre Channel SAN Ulf Troppens

2 Agenda What is IP Storage? Why IP Storage? Customers are using IP storage today! Is IP Storage suitable for high-end SANs? Conclusion 2/36

3 Agenda What is IP Storage? Why IP Storage? Customers are using IP storage today! Is IP Storage suitable for high-end SANs? Conclusion 3/36

4 Key Concept "Storage Network" LAN LAN Disk Disk Anwender Anwender Server Server Anwender Anwender Speichernetz Anwender Server Disk Disk Disk Anwender Server Disk Anwender Server Anwender Server Detach the storage from the host and substitute the direct connection with a new network Handle storage and servers as separate entities Move from a server centric IT-architecture to a storage centric IT-architecture 4/36

5 Storage Networks in the I/O Path Application Database Network Filesystem File-based Storage Network Network Filesystem SCSI Fibre Channel FCP iscsi Local Filesystem NFS CIFS HTTP DAFS Volume Manager Device Driver Block-based Storage Network 5/36

6 Techniques for Storage Networks File-based NFS CIFS HTTP DAFS Block-based SCSI Fibre Channel (FCP) Internet SCSI (iscsi) Internet FCP (ifcp) RAM-based Remote Direct Memory Access (RDMA) Transport protocols Gateway and Tunneling protocols Fibre Channel (FC-2, FC-3) IP over Fibre Channel (IPFC) TCP/IP Fibre Channel over IP (FCIP) UDP/IP Virtual Interface Architecture (VIA) / Remote Direct Memory Access (RDMA) Transmission Technics Fibre Channel (FC-0, FC-1, FC-2) Fast Ethernet GigabitEthernet SCSI Cable InifiniBand 6/36

7 Fibre Channel FCP Disk Disk Disk Disk Server Fibre Channel Switch Cabling: Fibre Channel Protocol: SCSI 7/36

8 Internet SCSI (iscsi) Disk Disk Disk Disk Server Ethernet Switch Cabling: TCP/IP/Ethernet Protocol: SCSI 8/36

9 Fibre Channel over IP (FCIP) Fibre Channel SAN FCIP IP Backbone FCIP Fibre Channel SAN 9/36

10 Internet FCP (ifcp) Metronet FCP (mfcp) FL-Port ifcp FL-Port ifcp FL-Port ifcp FL-Port ifcp ifcp FL-Port IP SAN IP Backbone IP SAN ifcp FL-Port ifcp FL-Port ifcp FL-Port ifcp FL-Port ifcp FL-Port 10/36

11 Internet Storage Name Service (isns)... is just a name service... used by iscsi and ifcp/mfcp Note: FCIP does not need a name service! 11/36

12 Comparison Storage / Server (HBA) Fabric Services (Routing) Transport (Wire) Fibre Channel FCP Fibre Channel Fibre Channel Fibre Channel FCIP Fibre Channel Fibre Channel IP / Ethernet ifcp Fibre Channel IP / Ethernet IP / Ethernet iscsi IP / Ethernet IP / Ethernet IP / Ethernet 12/36

13 Agenda What is IP Storage? Why IP Storage? Customers are using IP storage today! Is IP Storage suitable for high-end SANs? Conclusion 13/36

14 Why IP Storage? Technically, Fibre Channel is better than IP Fibre Channel has an integrated protocol stack Fibre Channel is well established in production environments IP Storage (iscsi, FCIP, ifcp/mfcp) IP Storage is in the early market IP Storage has an higher protocol overhead BUT TCP/IP/Ethernet has utterly wiped out other protocols IP Storage will be sufficient (most likely) IP Storage will be cheaper (most likely) 14/36

15 TCP/IP/Ethernet has utterly wiped out other protocols Data is already IP LAN (NFS, CIFS, application specific protocols,... ) Internet (HTTP, FTP,... ) MAN (Pilots with Gigabit Ethernet) File level storage is IP NFS, CIFS, FTP, HTTP (see above) Block level storage starts using IP FCIP, iscsi Voice starts moving to IP (VoIP) New office buildings!! Cisco IBM Agreement Gigabit Ethernet switch for the desktop Everything will be TCP/IP/Ethernet!!! 15/36

16 IP Storage will be cheaper than Fibre Channel One single IP based network is easier to manage than three Only IP skills required Only one physical network in office buildings More flexible assignment of bandwidth IP Storage components will be cheaper than FC components IP market volume >> Fibre Channel market volume economy of scale is better for IP components (mass production) More competition Cisco "meets" Brocade, Inrange, and McData Ethernet NIC vendors "meet" Emulex, JNI and QLogic 16/36

17 Why IP Storage? BUT TCP/IP/Ethernet has utterly wiped out other protocols IP Storage will be sufficient (most likely)??? IP Storage will be cheaper (most likely) 17/36

18 Agenda What is IP Storage? Why IP Storage? Customers are using IP storage today! Is IP Storage suitable for high-end SANs? Conclusion 18/36

19 Case Study 1: Automated Tape Duplication Goal: Automate tape duplication for desaster protection Two locations (10km distance) Gigabit Ethernet connection used during office hours Idle over night Gigabit Ethernet (Distance 10km) 19/36

20 Case Study 1: Automated Tape Duplication Goal: Automate tape duplication for desaster protection Two locations (10km distance) Gigabit Ethernet connection used during office hours Idle over night Tape applications iseries (AS/400) No iscsi drivers available! Legato Networker running on Sun Solaris Gigabit Ethernet (Distance 10km)??? Sun Legato iseries Networker BRMS 20/36

21 Case Study 1: Automated Tape Duplication Gigabit Ethernet (Distance 10km) Sun Legato Networker iseries BRMS iseries BRMS Sun Legato Networker 2109-F F16 FCIP Gateway FCIP Gateway 3584 LTO 21/ LTO

22 Case Study 1: Automated Tape Duplication Legato Networker: Remote tape access using application specific protocol Gigabit Ethernet (Distance 10km) Sun Legato Networker iseries BRMS iseries BRMS Sun Legato Networker 2109-F F16 FCIP Gateway FCIP Gateway 3584 LTO 3584 LTO 22/36

23 Case Study 1: Automated Tape Duplication Legato Networker: Remote tape access using application specific protocol iseries: Remote tape access using FCIP MByte/s sequential write on LTO Generation 1 drive Gigabit Ethernet (Distance 10km) Sun Legato Networker iseries BRMS iseries BRMS Sun Legato Networker 2109-F F16 FCIP Gateway FCIP Gateway 3584 LTO 3584 LTO 23/36

24 Case Study 1: Automated Tape Duplication Legato Networker: Remote tape access using application specific protocol iseries: Remote tape access using FCIP MByte/s sequential write on LTO Generation 1 drive Future: Encrypt WAN IP traffic using standard IP components Gigabit Ethernet (Distance 10km) Sun Legato Networker iseries BRMS iseries BRMS Sun Legato Networker 2109-F F16 FCIP Gateway FCIP Gateway 3584 LTO 3584 LTO 24/36

25 Case Study 2: Booting via iscsi Boot servers from external Fibre Channel Disksubsystem iscsi Disksubsystems are not (yet) very common Save internal Fibre Channel HBA May be cost saving if one Gigabit Ethernet NIC is sufficient for all traffic Use external disks instead of internal disk Lower TCO Server Server Server Server Server iscsi Gateway Disksubsystem 25/36

26 Case Study 3: Microsoft Exchange Requires a lot of storage but limited bandwidth Minimal CPU utilisation differences between iscsi software and drivers and Fibre Channel HBAs iscsi meets the performance requirements for many applications Source: Cisco Systems Source: Cisco 26/36

27 Why IP Storage? BUT TCP/IP/Ethernet has utterly wiped out other protocols IP Storage will be sufficient (most likely)? IP Storage will be cheaper (most likely) 27/36

28 Agenda What is IP Storage? Why IP Storage? Customers are using IP storage today! Is IP Storage suitable for high-end SANs? Conclusion 28/36

29 Classification of I/O Requirements Average performance Very high performance Low latency (local) Most applications Booting servers Some applications (e.g., central databases) High latency (remote) Remote backup Replication Asynchronous Mirroring Data Movers N/A 29/36

30 Classification of I/O Requirements Low latency (local) High latency (remote) Average performance Very high performance? - 30/36

31 Technical requirements for very high local performance IP Storage Very high throughput Low CPU load for I/O Very low latency for fast application response time Dedicated Networks for IP Storage 10 GBit/s IP SANs in 2H03 Trunking TCP/IP Offload Engines (TOEs) iscsi HBAs Future: Socked Direct Protocol (SDP) Future: iscsi RDMA extension Still open: FC protocol is still lighter than iscsi Latency in server >> Latency in SAN Future: Socked Direct Protocol (SDP) Future: iscsi RDMA extension Must be measured in real environments 31/36

32 Why IP Storage? BUT TCP/IP/Ethernet has utterly wiped out other protocols IP Storage will be sufficient (most likely) (?) IP Storage will be cheaper (most likely) 32/36

33 Agenda What is IP Storage? Why IP Storage? Customers are using IP storage today! Is IP Storage suitable for high-end SANs? Conclusion 33/36

34 Why IP Storage? Technically, Fibre Channel is better than IP Fibre Channel has an integrated protocol stack Fibre Channel is well established in production environments IP Storage (iscsi, FCIP, ifcp/mfcp) IP Storage is in the early market IP Storage has an higher protocol overhead BUT TCP/IP/Ethernet has utterly wiped out other protocols IP Storage will be sufficient (most likely) (?) IP Storage will be cheaper (most likely) 34/36

35 Conclusion FCIP is a key technology for connecting remote Fibre Channel SANs Many FCIP products are becoming available in 1H03 iscsi is in the early market today Interoperability is still an issue iscsi will meet the performance needs for most applications It is still open whether iscsi is sufficient for very high performance requirements Fibre Channel is the best option for most local SANs today iscsi can be a nice add-on for already established Fibre Channel SANs iscsi may replace Fibre Channel in the long term 35/36

36 Quellenangabe Inhalte und Abbildungen der Präsentation Speichernetze Grundlagen und Einsatz von Fibre Channel SAN, NAS, iscsi und InfiniBand Ulf Troppens, Rainer Erkens 1. Auflage 2003 dpunkt.verlag, Heidelberg ISBN X Weiterführende Links 36/36