Introduction to Cray Data Virtualization Service

S-0005-3102 - Jan 2011

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• Available formats
• Table of contents
• Software releases this book supports
• Other versions of this book

Available formats

	S-0005-3102.pdf
	html-S-0005-3102

Table of contents

1  Introduction
2  DVS Modes
    2.1  Serial Mode
    2.2  Cluster Parallel Mode
    2.3  Stripe Parallel Mode
    2.3.1  Atomic Stripe Parallel Mode
    2.4  Loadbalance Mode
    2.4.1  Compute Node Root Runtime Environment
    2.4.2  Cluster Compatibility Mode (CCM)
    2.5  Failover
    2.5.1  Examples of Messages Indicating a Failover Event
    2.6  Cray DVS Statistics
3  Cray DVS Configuration
    3.1  DVS on Systems Using Gemini
    3.2  Modifying DVS Configuration for CLE
    3.3  Starting DVS Automatically
4  Additional Mount Options and Environment Variables
    4.1  Additional User Environment Variables and Client Mount Options
    4.1.1  Additional /etc/fstab Options
    4.1.2  /etc/fstab Examples
    4.1.3  Environment Variables
5  Troubleshooting
    5.1  ALPS: "DVS server failure detected: killing process to avoid potential data loss"
    5.2  Application Hangs As a Result of NFS File Locking
    5.3  Caveats and Limitations
    5.3.1  DVS blksize Must Match Or Be a Multiple of GPFS Block Size
    5.3.2  mmap() Support
    5.3.3  Client Consistency
    5.3.4  Expanded File System Support

Software Releases this book supports

Product	Version	Sub Product	Release Date
Cray Linux Environment (CLE)	3.1.UP02		Jan 2011
Cray Linux Environment (CLE)	3.1.UP03		Mar 2011
Cray Linux Environment (CLE)	4.0		Jun 2011
Cray Linux Environment (CLE)	4.0.UP01		Sep 2011

Other versions of this book

Publication Number	Release Date	Supported Software Releases
S-0005-5003	Jun 2013	Cray Linux Environment (CLE) 5.0.UP03
S-0005-5002	Mar 2013	Cray Linux Environment (CLE) 4.2, Cray Linux Environment (CLE) 5.0.UP02
S-0005-4003	Mar 2012	Cray Linux Environment (CLE) 4.0.UP03, Cray Linux Environment (CLE) 4.1.UP01
S-0005-4002	Dec 2011	Cray Linux Environment (CLE) 4.0.UP02
S-0005-31	Jun 2010	Cray Linux Environment (CLE) 3.1
S-0005-30	Mar 2010	Cray Linux Environment (CLE) 3.0
S-0005-22	Jul 2009	Cray Linux Environment (CLE) 2.2
S-0005-10	Feb 2008	Knowledge Base 1.0, UNICOS/lc 2.0