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EXAScaler
Installation and Administration Guide
Version 5.0.0 | 96-00277-001 | Revision C0
Important Information
Information in this document is subject to change without notice and does not represent a commitment on the
part of DataDirect Networks, Inc. No part of this manual may be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying and recording, for any purpose other than the
purchaser’s personal use without the written permission of DataDirect Networks, Inc.
© 2019 DataDirect Networks, Inc. All rights reserved.
DataDirect Networks, the DataDirect Networks logo, DDN, DirectMon, Enterprise Fusion Architecture, EFA, ES7K,
ES12K, ES14KX, ES18K, ES200NV, ES400NV, ES7990, EXAScaler, GRIDScaler, GS7K, GS12K, GS14KX, GS18K,
GS200NV, GS400NV, GS7990, IME, IME140, IME14K, IME240, Infinite Memory Engine, Information in Motion, In-
Storage Processing, MEDIAScaler, NAS Scaler, NoFS, ObjectAssure, ReACT, SFA, SFA 10000 Storage Fusion
Architecture, SFA10K, SFA12K, SFA12KX, SFA14K, SFA14KX, SFA18K, SFA200NV, SFA400NV, SFA7700, SFA7700X,
SFA7990, SFX, Storage Fusion Architecture, Storage Fusion Fabric, Storage Fusion Xcelerator, SwiftCluster, WOS,
and the WOS logo are registered trademarks or trademarks of DataDirect Networks, Inc. All other brand and
product names are trademarks of their respective holders
.
DataDirect Networks makes no warranties, express or implied, including without limitation the implied warranties
of merchantability and fitness for a particular purpose of any products or software. DataDirect Networks does
not warrant, guarantee or make any representations regarding the use or the results of the use of any products
or software in terms of correctness, accuracy, reliability, or otherwise. The entire risk as to the results and
performance of the product and software are assumed by you. The exclusion of implied warranties is not
permitted by some jurisdictions; this exclusion may not apply to you.
In no event will DataDirect Networks, their directors, officers, employees, or agents (collectively DataDirect
Networks) be liable to you for any consequential, incidental, or indirect damages, including damages for loss of
business profits, business interruption, loss of business information, and the like, arising out of the use or inability
to use any DataDirect product or software even if DataDirect Networks has been advised of the possibility of such
damages by you. Because some jurisdictions do not allow the exclusion or limitation of liability for consequential
or incidental damages, these limitations may not apply to you. DataDirect Networks liability to you for actual
damages from any cause whatsoever, and regardless of the form of the action (whether in contract, tort including
negligence, product liability or otherwise), is limited to the sum you paid for the DataDirect product or software.
All Products cited in this document are subject to DDN’s Limited Warranty Statement and, where applicable, the
terms of DDN’s End User Software License Agreement (EULA).
The cited documents are available at: http://www.ddn.com/support/policies/.
For archived versions of either document, please contact DDN.
August 2019
96-00277-001 Rev. C0 EXAScaler 5.0.0 Installation and Administration Guide | 3
Table of Contents
TABLE OF CONTENTS ..................................................................................................................................................... 3
LIST OF FIGURES .............................................................................................................................................................. 8
LIST OF TABLES ................................................................................................................................................................ 9
1. INTRODUCTION ...................................................................................................................................................... 10
2. SOLUTION OVERVIEW .......................................................................................................................................... 12
2.1 Cluster Concepts............................................................................................................................................ 12
2.1.1 File System ........................................................................................................................................ 13
2.1.2 High Availability .............................................................................................................................. 15
2.1.3 Storage ............................................................................................................................................... 16
2.1.4 Compute Nodes ............................................................................................................................... 16
2.1.5 Client Cluster Interconnect......................................................................................................... 17
2.2 Features............................................................................................................................................................. 17
2.2.1 Scalability .......................................................................................................................................... 17
2.2.2 Performance ..................................................................................................................................... 17
2.2.3 Open Source ..................................................................................................................................... 17
3. PRE–INSTALLATION ............................................................................................................................................. 19
3.1 Storage .............................................................................................................................................................. 19
3.1.1 Assigning Names to Virtual Disks on the Storage Server ................................................ 19
3.1.2 EXAScaler on External Servers .................................................................................................. 21
3.1.3 EXAScaler on Embedded Platforms ........................................................................................ 21
3.2 Server Requirements .................................................................................................................................... 22
3.3 Networking ....................................................................................................................................................... 23
3.3.1 Private Management Network ................................................................................................... 23
3.3.2 Network Time Protocol (NTP) ..................................................................................................... 23
3.3.3 Static IP Address ............................................................................................................................. 23
3.3.4 Static Hostname .............................................................................................................................. 23
3.3.5 High Speed IP ................................................................................................................................... 23
3.3.6 IB Subnet Manager ......................................................................................................................... 23
3.3.7 IPoIB Datagram Mode ................................................................................................................... 23
96-00277-001 Rev. C0 EXAScaler 5.0.0 Installation and Administration Guide | 4
4. SERVER INSTALLATION ...................................................................................................................................... 24
4.1 Installing Operating Environment ........................................................................................................... 24
4.2 Embedded Virtual Machine Installation ............................................................................................... 25
4.3 Configuring Storage Device Aliases ...................................................................................................... 26
4.3.1 External DDN SFA Storage .......................................................................................................... 26
4.3.2 External Metadata Storage ......................................................................................................... 27
4.3.3 Embedded Solutions .....................................................................................................................29
4.4 Configuring Storage Network for InfiniBand Connections ........................................................... 30
4.4.1 IB SRP Connections ....................................................................................................................... 30
4.4.2 IB iSER Connections ...................................................................................................................... 30
4.5 Storage Performance Validation ............................................................................................................. 32
4.6 Network Performance Validation ............................................................................................................ 35
4.6.1 Ethernet .............................................................................................................................................. 35
4.6.2 InfiniBand and Omni-Path ........................................................................................................... 35
4.7 EXAScaler Configuration ............................................................................................................................. 35
4.7.1 Sample Configuration Files ......................................................................................................... 35
4.7.2 Editing the Configuration File ....................................................................................................36
4.7.3 Multi–Rail LNet ................................................................................................................................ 51
4.7.4 Zoning.................................................................................................................................................. 55
4.8 EXAScaler REST API ...................................................................................................................................... 58
4.8.1 Preparing for REST API Setup .................................................................................................... 60
4.8.2 Configuring SSL ............................................................................................................................... 61
4.8.3 Defining REST API Settings ........................................................................................................ 69
4.8.4 Applying REST API Settings ........................................................................................................ 71
4.8.5 Checking Certificates .................................................................................................................... 71
4.8.6 certgen Command Reference .................................................................................................... 72
4.9 Server Node Installation ............................................................................................................................. 73
4.9.1 Installing EXAScaler on a New Server Node ........................................................................ 73
4.9.2 Generating SSH Keys .................................................................................................................... 76
4.9.3 Generating the Corosync Authentication Key ...................................................................... 77
96-00277-001 Rev. C0 EXAScaler 5.0.0 Installation and Administration Guide | 5
4.9.4 Applying Configuration Changes to All HA Nodes ............................................................. 77
4.9.5 Verifying the Connectivity of Network Interfaces and File Systems ......................... 78
4.9.6 Configuring HA Resources ......................................................................................................... 80
5. HA CLUSTER MANAGEMENT ............................................................................................................................. 82
5.1 Starting and Stopping HA Resources .................................................................................................... 82
5.2 Restarting after Problems ..........................................................................................................................83
5.3 Modifying EXAScaler Settings in an Existing Cluster .......................................................................83
5.4 Adding MDT and OST Disks to Existing Cluster Hosts...................................................................... 85
6. CLIENT INSTALLATION ........................................................................................................................................ 91
6.1 Building Client Packages ............................................................................................................................ 91
6.2 Mounting the File System ...........................................................................................................................92
6.3 File Locking (flock) on Lustre Clients .....................................................................................................92
6.4 Validating Performance .............................................................................................................................. 93
7. UPGRADING TO EXASCALER 5.0.0....................................................................................................................94
7.1 Prerequisites for Upgrading ...................................................................................................................... 94
7.2 Upgrading from EXAScaler 3.x and 4.x .................................................................................................. 94
7.3 Upgrading from EXAScaler Versions from 1.6.x to 2.4.2 ..................................................................97
8. ONLINE SFA UPGRADE ...................................................................................................................................... 104
8.1 Hosts That Belong to Primary and Secondary SFA Controllers ................................................ 104
8.2 Upgrading Procedure ................................................................................................................................ 105
9. TROUBLESHOOTING EXASCALER INSTALLATION .................................................................................. 110
9.1 Troubleshooting the EXAScaler Configuration File ........................................................................110
9.2 Storage Controller/Path Failure ...........................................................................................................110
9.3 Server Node Failure ....................................................................................................................................110
9.4 LBUG .................................................................................................................................................................110
9.5 Lustre Logging ..............................................................................................................................................110
9.6 Performance Issues .................................................................................................................................... 111
9.6.1 Storage Hardware Issues .......................................................................................................... 111
9.6.2 Client Network Issues ................................................................................................................. 111
9.6.3 Adaptive Routing Issues ............................................................................................................ 111
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