Implementing iscsi in Storage Area Networks
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1 Implementing iscsi in Storage Area Networks The Advantages of a Software Initiator Solution Wei-Li Liu ADNET Systems, Inc. 2 Brookcrest Court, Potomac MD Phone: Fax: wliu@pop900.gsfc.nasa.gov Presented at the THIC Meeting at the Raytheon ITS Auditorium 1616 McCormick Drive, Upper Marlboro MD October 26-27, 2004
2 Introduction ADNET Systems, Inc. NASA Goddard Space Flight Center Task HECN High End Computing Network Project Manager J. Pat Gary 2
3 Outline Network Storage Implementation of Storage Area Network Implementation of iscsi The iscsi Test 3
4 Network Storage Direct Attached Storage (DAS) Network Attached Storage (NAS) Advantages = multiple users; platform independence; expandability; fault tolerance Storage Area Network (SAN) Advantage = prevents normal data backup over SAN from polluting regular network traffic 4
5 Implementation of SAN Fibre Channel iscsi Advantages Speed Market Dominance Data Only Traffic Cost Ethernet Ubiquities Disadvantages Cost Additional Training Speed Mixed Network Traffic 5
6 Implementation of iscsi iscsi Initiator iscsi Target iscsi Gateway 6
7 Implementation of iscsi (Continued) iscsi Initiator Selections, e.g. Software Initiator Hardware Initiator Adaptec 7211C Adaptec TOE NAC 7711C 7
8 Implementation of iscsi (Continued) Off Load Scheme Selections No Off-Load (Software Initiator) TCP Off-load Engine (TOE) iscsi Host Bus Adapter (HBA) SOFTWARE INITIATOR HARDWARE INITIATOR HARDWARE INITIATOR CPU iscsi TCP/IP CPU iscsi CPU CARD CARD TCP/IP CARD iscsi TCP/IP Cisco s iscsi Driver w/ NIC Adaptec TOE NAC 7711C adapter Adaptec 7211C iscsi adapter card 8
9 Test Overview Goal Variables Configuration Results Analysis Conclusions 9
10 Test Goal Compare performance of iscsi data transfer using different offload methods Do different operating systems affect the data transfer speed and efficiency? Do different PC configurations affect the data transfer speed and efficiency? 10
11 Test Variables High End PC 2 GHz Xeon with 100 MHz PCI Low End PC 1.4 GHz Pentium IV with 33 MHz PCI Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver 11
12 Test Variables High End PC 2 GHz Xeon with 100 MHz PCI Low End PC 1.4 GHz Pentium IV with 33 MHz PCI Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver 12
13 Test Variables 1 2 High End PC 2 GHz Xeon with 100 MHz PCI 3 Low End PC 1.4 GHz Pentium IV with 33 MHz PCI Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver 13
14 Test Configuration GSFC SAN FC FABRIC Target LUN0 1 TB Apple Xserve Raid Fibre Channel Switch Brocade 3800 NASA GSFC SAN Fibre Channel Fabric iscsi Gateway Nishan 3000 Building 32 High End PC Nishan Low End PC APPLE RAID Brocade 3800 Brocade 3800 Brocade 3800 Building 28 14
15 Test Configuration (Continued) SPEED TEST IOZONE File System Benchmark Tool Versatile in Simulating Actual Apps Write / Rewrite / Read / Re-read thread with a file size of 8 GB 2 thread with a file size of 4 GB 4 thread with a file size of 2 GB 8 thread with a file size of 1 GB 15
16 Test Configuration (Continued) EFFICIENCY TEST CPU Usage Windows Task Manager Linux TOP 16
17 Test Results High End PC 2 GHz Xeon with 100 MHz PCI Low End PC 1.4 GHz Pentium IV with 33 MHz PCI Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver 17
18 Test Results (Continued) 1 High End PC 2 GHz Xeon with 100 MHz PCI Low End PC 1.4 GHz Pentium IV with 33 MHz PCI Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver 18
19 Test Results (Continued) High End PC Running Red Hat 9 Performance Comparison 120, , , , , , thread 2 4 KB/S 8 1 thread Linux w/ Gig E NIC & Cisco sortware Initiator on a HE PC Linux w/ Adaptec TOE on a HE PC Threads Initial write Rewrite Read Re-read 19
20 Test Results (Continued) High End PC Running Red Hat 9 CPU Usage Comparison Percentages Linux w/ Gig E NIC & Cisco SW initiator on a HE PC Threads Linux w/ Adaptec TOE on a HE PC Linux overall write Linux overall read 20
21 Test Results (Continued) High End PC 2 GHz Xeon with 100 MHz PCI Low End PC 1.4 GHz Pentium IV with 33 MHz PCI Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver 21
22 Test Results (Continued) High End PC 2 GHz Xeon with 100 MHz PCI 2 Low End PC 1.4 GHz Pentium IV with 33 MHz PCI Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver 22
23 Test Results (Continued) High End PC Running Windows 2000 Pro Performance Comparison 90, , , , , , , , , thread thread KB/S Win2K w/ Gig E NIC & Cisco software initiator on a HE PC Win2K w/ Adaptec iscsi Card on a HE PC Threads Initial write Rewrite Read Re-read 23
24 Test Results (Continued) High End PC Running Windows 2000 Pro CPU Usage Comparison Percentages Win2K w/ Gig E NIC & CISCO software initiator on a HE PC Win2K w/ Adaptec iscsi Card on a HE PC Threads Initial write Rewrite Read Re-read 24
25 Test Results (Continued) High End PC 2 GHz Xeon with 100 MHz PCI Low End PC 1.4 GHz Pentium IV with 33 MHz PCI Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver 25
26 Test Results (Continued) High End PC 2 GHz Xeon with 100 MHz PCI 3 Low End PC 1.4 GHz Pentium IV with 33 MHz PCI Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver Cisco iscsi Driver 26
27 Test Results (Continued) Low End PC Running Windows 2000 Pro Performance Comparison 60, , , , , , thread 2 4 KB/S 8 1 thread Win2K w/ Gig E NIC & Cisco software initiator on a LE PC Win2K w/ Adaptec iscsi Card on a LE PC Threads Initial write Rewrite Read Re-read 27
28 Test Results (Continued) Low End PC Running Windows 2000 Pro CPU Usage Comparison Percentages Win2K w/ Gig E NIC & CISCO software initiator on a LE PC Win2K w/ Adaptec iscsi Card on a LE PC Threads Initial write Rewrite Read Re-read 28
29 Analysis Performance & CPU Usage Comparison Windows vs. Linux Environment High End vs. Low End PC 29
30 Analysis (Continued) High End PC Running Red Hat 9 Performance CPU Usage Cisco iscsi Driver Adaptec TOE NAC 7711C Cisco iscsi Driver Adaptec TOE NAC 7711C Overall Write 100% 110% 100% 68% Overall Read 100% 98% 100% 67% 30
31 Analysis (Continued) High End PC Running Windows 2000 Pro Performance CPU Usage Cisco iscsi Driver Adaptec 7211 iscsi Cisco iscsi Driver Adaptec 7211 iscsi Overall Write 100% 103% 100% 79% Overall Read 100% 80% 100% 47% 31
32 Analysis (Continued) Low End PC Running Windows 2000 Pro Performance CPU Usage Cisco iscsi Driver Adaptec 7211 iscsi Cisco iscsi Driver Adaptec 7211 iscsi Overall Write 100% 122% 100% 74% Overall Read 100% 127% 100% 67% 32
33 Analysis (Continued) Generally, hardware initiator out performs software initiator in both data writing and reading Exception data reading with Windows 2000 on the high end PC Generally, more yield better write/read performance Exception data writing with Linux Exception data writing/reading with Windows 2000 on the low end PC when implementing software initiator CPU usage is always greater when using the software initiator More consume more CPU processing power Exception data reading with Windows 2000 on the low end PC when implementing software initiator 33
34 Analysis (Continued)
35 Analysis (Continued) 1 35
36 Analysis (Continued) Windows and Linux Performance Comparison Software Initiator Hardware Initiator Windows 2000 Pro Linux Red Hat 9 Windows 2000 Pro Linux Red Hat 9 Overall Write 44% 100% 53% 100% Overall Read 81% 100% 66% 100% 36
37 Analysis (Continued) 2 37
38 Analysis (Continued) High End PC & Low End PC Performance Comparison Software Initiator Hardware Initiator Low End PC High End PC Low End PC High End PC Overall Write 69% 100% 71% 100% Overall Read 57% 100% 85% 100% 38
39 Analysis (Continued) High End PC & Low End PC CPU Usage Comparison Software Initiator Hardware Initiator Low End PC High End PC Low End PC High End PC Overall Write 216% 100% 165% 100% Overall Read 189% 100% 226% 100% 39
40 Conclusion CPU offloading works well Linux outperforms Windows Hardware initiator is justified better in the case of a Low End PC 40
41 Acknowledgements Hoot Thompson (Patuxent Technology Partners) Mary Shugrue (BPX) Pat Gary (NASA) Ben Kobler (NASA) Bill Fink (NASA) Eduardo Takamura (ADNET) Aruna Muppalla (ADNET) Paul Lang (ADNET) Rich Bono (Adaptec) Jeff Martz (CSC) Rich Isley (GMRS) 41
42 References Cisco iscsi Driver Microsoft iscsi Driver Software IOZONE by Don Capps 42
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