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Digital Media Storage Solution Installation Guide  

 

21 

© Copyright 2010, IBM Corporation. All rights reserved. 

 

MIGRATING FROM XSAN MDC TO STORNEXT MDC 

 
Q. Are there new features in Xsan 2.2 that make it harder to swap out XServe MDCs and replace them with 
StorNext Linux MDCs? 
 
A: “NamedStreams” is the Apple Xsan feature that causes some problems with StorNext.  If you don’t turn it on, 
you’re fine.  By default, “NamedStreams” is turned on.  NamedStreams will make things like the basic StorNext 
command line copy command, cvcp, not  work.  Before Xsan 2.2, you could have it copy the “._” files, but now 
you can't, so you're stuck doing a move with the Apple Finder (which is basically as good as cvcp anyway).  Other 
than that, it shouldn't be much of an issue since it doesn't affect clients that don't know about it, and by definition 
Windows/Linux clients don't know about resource forks.   
 
Q. Does a customer need to buy A special level of StorNext support to support StorNext in Xsan environments? Is 
this true whether you are using SN MDCs or Apple MDCs? 
 
A: No, You don’t need to buy any special support to get support for StorNext in an Xsan environment. See next 
page. 
 

 

Summary of Contents for System Storage DS4000

Page 1: ...Mac Linux Windows Client and StorNext Environments Con Rice Modular Storage Product Specialist LSI Corporation 12007 Sunrise Valley Drive Suite 325 Reston VA20191 Cell 703 867 0012 Tel 703 262 5418 e...

Page 2: ...8 Windows Clients 8 Windows Server MDCs Future Support 8 Linux StorNext Clients and MDCs 9 IBM DS Storage 9 Solutions 12 Apple Hardware Connect Only 12 Apple Servers and or clients with no shared fil...

Page 3: ...enous StorNext configuration 28 Mid to large sized Heterogeneous StorNext configuration 29 Additional Reference Links 31 Notices 31 Trademarks 32 Acknowledgements Many people contributed to this docum...

Page 4: ...e storage offerings in Apple environments in the past have been poor The now discontinued Apple X RAID storage products were never very highly regarded and neither is the current Promise storage There...

Page 5: ...often occur in the Oil and Gas industry for seismic processing and in some scientific computing environments These environments generally include a pair of Linux servers acting as Meta Data Controller...

Page 6: ...nvironment The announced support for the IBM Digital Media Storage Solution is the result of efforts between ATTO HBAs Quantum StorNext LSI Storage Subsystems and IBM We have identified a set of hardw...

Page 7: ...s on the storage systems Supported File Sharing Environments The above hardware configurations will allow you to have Linux Apple and Windows client systems share physical access to the same storage s...

Page 8: ...se Apple servers as the Meta Data Controllers MDCs The reason is if you use the Xsan clients and Xsan Meta Data Controller MDC then your primary support for the shared file system comes from Apple and...

Page 9: ...dows 7 Must use supported ATTO HBA and MultiPath Director driver purchased from ATTO or ATTO Resellers If the environment is homogenous Linux refer to the list of currently supported HBA s and multipa...

Page 10: ...rate disk writes 4 500 7 500 11 000 9 500 20 000 38 000 Drives 48 SAS 1 SATA 96 SAS 2 NL SAS SED 96 SAS 2 NL SAS SED 112 FC SATA FDE 448 FC SATA FDE 448 FC SATA FDE SSD 480 SATA DS3400 DS3500 DS3500...

Page 11: ...tallation Guide 11 Copyright 2010 IBM Corporation All rights reserved Sustained throughput disk read MB s 925 2 000 4 000 1 600 1 600 6 400 Sustained throughput disk write MB s 720 1 100 2 400 1 400 1...

Page 12: ...and ATTO MP Director Without StorNext or Xsan support This is basic host connectivity support Apple Homogenous Shared File Apple Xsan Clients with Linux MDC Meta Data Controller Multiple Apple Host Cl...

Page 13: ...ndows Clients and Linux MDC Mixed Host Apple Windows Client and Linux Client connected to DS3000 DS4000 DS5000 Storage Apple Leopard and Snow Leopard using Xsan Client software Using ATTO HBAs and Mul...

Page 14: ...clients are MacOS Windows Client or mixed Supported ATTO HBAs RDAC MPP or ATTO as appropriate Client Apple OSX Leopard x64 Supported ATTO HBAs ATTO Yes Apple OSX Snow Leopard x64 Supported ATTO HBAs A...

Page 15: ...a or Journal LUNs When configuring the storage partitioning within the storage subsystem the methodology is as follows All HBAs in the MDCs will be defined within a single host definition called MDCs...

Page 16: ...multiple threads to be talking to disk offering enhanced performance Data 5 4 1 256 As required to meet performance criteria 5 8 1 128 As required to meet performance criteria Data Based upon StorNext...

Page 17: ...AC systems a Switched environments preferred b In non switched direct connect environments configure the ATTO host adapter for an Arbitrated Loop connection instead of allowing them to auto negotiate...

Page 18: ...llation Guide 18 Copyright 2010 IBM Corporation All rights reserved 9 For clients limit the number of defined paths to four This gives you the redundancy you need while minimizing boot time During boo...

Page 19: ...1 or RAID 5 8 1 b Explanation RAID 5 4 1 means a RAID group using RAID 5 with 4 data drives and one parity drive Even though in actuality the data and parity would be striped across all drives 13 Som...

Page 20: ...System In the case of the joint customer having an StorNext controlled SAN file system i e StorNext runs the main server or Meta Data Controller then Quantum should receive the first call If Apple do...

Page 21: ...StorNext command line copy command cvcp not work Before Xsan 2 2 you could have it copy the _ files but now you can t so you re stuck doing a move with the Apple Finder which is basically as good as...

Page 22: ...ectivity solution Celerity offers a highly integrated family of adapters designed to transfer data efficiently and flawlessly using a combination of features that enhance the data delivery process ATT...

Page 23: ...Ie 2 0 PCIe 2 0 PCIe 2 0 Bus Characteristics X8 X8 X8 Optical Interface SPF LC SPF LC SPF LC Maximum Cable Length 300m 2GB 150m 4GB 50m 8GB 300m 2GB 150m 4GB 50m 8GB 300m 2GB 150m 4GB 50m 8GB Low Prof...

Page 24: ...orNext configuration Example 1 Drawing depicts large and expandable SAN with heterogeneous client connectivity Multiple DS5300 connected to meshed SAN fabric with a minimum of two Fibre Channel switch...

Page 25: ...oth Controller A and B MDCs each have two dual ported HBAs with connections into a redundant switched network and zoned to be able to see both Controller A and B All Storage Configurations for StorNex...

Page 26: ...o meshed SAN fabric with a minimum of two Fibre Channel switches For DS5100 DS5300 configurations a minimum of two switches is recommended Drawing shows minimal SAN to DS5300 connections to simplify t...

Page 27: ...DS5020 connected to meshed SAN fabric with a single Fibre Channel switch For DS5020 configurations Multiple Fibre Channel switches are not required but they are recommended Drawing shows minimal SAN t...

Page 28: ...or DS3400 configurations Multiple Fibre Channel switches are not required but they are recommended Drawing shows minimal SAN to DS3400 connections to simplify the drawing However up to 4 connections a...

Page 29: ...switches For DS5100 DS5300 configurations a minimum of two switches is recommended Drawing shows minimal SAN to DS5300 connections to simplify the drawing However up to 16 connections is supported In...

Page 30: ...All rights reserved APPENDIX B ATTO HBA AND MULTIPATH DIRECTOR INSTALLATION AND TROUBLESHOOTING MANUAL Please refer to ATTO Celerity MultiPath Director Manual for installation and troubleshooting o h...

Page 31: ...not allow disclaimer ofexpress or implied warranties in certain transactions therefore this statement may not apply to you This information could include technical inaccuracies or typographical error...

Page 32: ...of IBMtrademarks is available on the Web at http www ibm com legal copytrade shtml The following terms are trademarks of other companies Apple the Apple logo Mac Mac OS and Macintosh are trademarks of...

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