IP storage
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IP storage is used in storage network. IP storage protocols are discussed in this presentation According to Mumbai University syllabus of BE(IT)
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IP storage
- 1. IP STORAGE IP- based storage protocol known as IP Storage -- Priyanka Patil ME(Comp)
- 2. IP Storage Protocols FC SAN Used for Big enterprise Suitable for SCSI and LAN(TCP/IP) FC IP- Used for small/ medium enterprise build upon TCP, IP, Ethernet Protocols available for transmitting storage data traffic over TCP/IP are as follows: 1. iSCSI-: internet Small computer system interface 2. iFCP- : intenet Fiber channel protocol 3. FCIP- : FC over IP
- 3. iSCSI Transmit SCSI protocol over TCP/IP SCSI cable replaced by TCP/IP Ethernet connection iSCSI is installed in OS as device driver Traditional Ethernet card: separate iSCSI device driver installation( load on CPU) Used for low or average performance requirement Now , iSCSI + HBA( hardware) :( relives load on CPU) Which gives high performance therefore used for application where high performance is required
- 4. SCSI over TCP/IP Ethernet
- 5. iSCSI benefits: FC SANS storage capacity is made available with iSCSI to FC gateway Booting from diskless node is possible
- 6. iFCP and mFCP Used on production environment iFCP realise mapping of FCP on TCP/IP iFCP is used in IP/ Ethernet network infrastructure (reduces no. of FC devices) To do so, F-port, FL-port are needed on LAN switches mFCP to iFCP is used to connect large network mFCP: metro FCP: works on UDP/IP iFCP : works on TCP/IP
- 7. iFCP (cont..) To implement services like Zoning & name services use appropriate gateway & switch mFCP & iFCP are complex protocols gives compatibility issues due to dependency on other devices. mFCP & iFCP components need testing & implementation effort by manufacturer FCIP & FC to iSCSI is better option
- 8. iFCP
- 9. FCIP Removes distance limitation of FC Covers larger distance suitable for big enterprise Distance between Production site and Backup site is more in this case WAN or tape backup techniques were used Now , FCIP is alternate technique is present to take backup
- 10. FCIP(cont..) It is a tunnel between two FC islands connected with each other over TCP/IP Creates point to point connection between FC SANs tunnels It Sends FC frames into TCP/IP packets through tunnel Provides data encryption with the help of IPsec over IP routers
- 11. FCIP
- 12. iSNS internet storage name service Services that allow to get properties of end device in IP network iSNS is client server based application Client registers with server in the network Every devices join and leave information is updated to client present in the network It is integrated service of iSCSI, iFCP
- 13. FC IP Storage Efficient than IP storage Less efficient Uses FCP Uses TCP/IP Less protocol overhead Higher protocol overhead Reliable transmission techniques Unreliable transmission techniques
- 14. IP storage advantages and disadvantages Advantages Disadvantages Has common network for LAN, WAN,MAN,SAN Lack of interoperability among different component Use of TCP/IP gives standardization & maturity CPU cycles are heavily used for storage People have more knowledge about TCP/IP than FC TCP/IP has higher network overhead No distance limit Not designed for bulk data Low hardware cost than FC Ethernet switches have high delay IP storage will be useful for average application
- 15. Infiniband switch Defines copper & fiber optics cables with maximum length To provide remedy for drawback of PCI bus Replaces PCI bus with serial network In single data center different IO techniques are use like FC,ethernet,SCSI Infiniband acts as communication medium for those who are in the network Forwarding and receiving data packets from source to destination Provides features such as flow control,zoning, etc
- 16. Infiniband (cont..) Fast interconnect for IPC within parallel cluster network Supports full duplex communication HCA: host channel adapters Acts as bridge between infiniband n/w and the system bus to which CPU & RAM are connected TCA: target channel adapters Connect infiniband n/w & peripheral devices via SCSI,FC, ethernet
- 18. VIA- Virtual Interface Architecture It is integral part of infiniband switch Provides fast & efficient data exchange between applications running on different computers For this n/w should have low latency & low error rate Due to this VIA is used over shorter distance within data center or building VIA reduces complexity acts as a bridge between application & network card so it bypasses OS while exchanging data
- 19. Establish Virtual interface: Reserve common memory on both computers which will be used by application & local network card to exchange data When application fills with data it announces door bell for sending it in the queue VI hardware then reads the data from common memory and transmit it to second computer An application on one computer communicate with VI NIC of other computer by bypassing OS VI kernel : to add and delete VIs
- 21. References IP storage Storage Network Management and Retrieval Vaishali kumar, Nilima Dongre Wiley Precise Textbook series 2016