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LA-UR-12-23586
Team Members: Matthew Broomfield (New Mexico Tech)
Eric Boyer (Michigan Tech) Terrell Perrotti (South Carolina State University)
Mentors: David Kennel (DCS-1)
Greg Lee (DCS-1)
Instructors: Dane Gardner (NMC)
Andree Jacobson (NMC)
GlusterFS One Storage Server to Rule Them All
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l Introduction to GlusterFS l Services l Administration l Performance l Conclusions l Future Work
Outline
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• GlusterFS is a Linux based distributed file system, designed to be highly scalable and serve many clients
What is GlusterFS?
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• No centralized metadata server • Scalability • Open Source • Dynamic and live service modifications • Can be used over Infiniband or Ethernet • Can be tuned for speed and/or resilience • Flexible administration
Why Use GlusterFS?
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l Enterprise environments • Virtualization
l High Performance Computing (HPC) l Works with Mac, Linux, and Windows clients
Where Is It Useful?
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• Individual nodes export bricks ( directories ) to GlusterFS
• GlusterFS combines bricks into virtual volumes
How Does It Work?
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• Different GlusterFs volume types:
GlusterFS Volume Types
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• GlusterFS has a built in quota service and uses POSIX ACLs for user control
• POSIX ACLs • Can set individual users or group permissions
• Quotas • Given via directory
• Both apply to Mac and windows clients (NFS/SAMBA)
Data Control
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l GlusterFS volumes can be exported via NFSv3 • POSIX ACLs are lost when exporting directly via NFS • Enable POSIX ACLs by mounting via GlusterFS and exporting
via NFS
• SAMBA allows Windows users to modify NTFS permissions on files
Exporting
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l Snapshots • We used the rsnapshot utility to enable snapshots • Use cron jobs to specify snapshot intervals and locations
l Auditing • The auditd utility can be used in conjunction with GlusterFS • Shows detailed file interactions
• GlusterFS built-in logging support • Performance • Diagnostics • Events (Warnings, Errors, General Information)
Data Support
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l GlusterFS has an intuitive CLI • Allows for quick volume tuning, shrinking, and expanding
while the system is online and available • Easily integrated into current infrastructure
l Pitfalls • Latency induced when mounting and exporting • GlusterFS mounting/unmounting occasionally hung • Metadata is distributed, thus harder to remove
Administration
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• Open Source • Can use commodity hardware • Can use 1 or 10Gbps Ethernet
Total Cost of Operation
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l Base-N Distributed across N nodes
l Striped-X-N Striped across X nodes on an N node volume
l Replicated-X-N Replicated across X nodes on
an N node volume
l Hybrid-X-Y-N Striped across X nodes, Distributed across Y nodes on an N node volume
Performance Testing Key
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Write Performance
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Write Performance
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Write Performance
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Read Performance
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Read Performance
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Read Performance
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Ls Performance
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• Replicated volumes can self-heal
Fault Tolerance
FILE A
FILE B
FILE A FILE B
FILE A FILE B
BRICK 1
BRICK 2
BRICK 1
BRICK 2
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• GlusterFS proved to have widespread capabilities as a virtual file system
• Scalability is very dependent upon the underlying hardware
• Lack of built-in encryption and security paradigm • Best suited in a general purpose computing
environment
Conclusions
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• GlusterFS over Infiniband • Geo-replication • Unified File and Object Storage • Apache Hadoop • Scalability for 1000’s of nodes • Using other filesystems on top of GlusterFS • Testing different RAID types
Future Research
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• We would like to thank: • Los Alamos National Laboratory • New Mexico Consortium/PRObE • National Science Foundation • National Nuclear Security Administration • Gary Grider and the HPC division • Carol Hogsett and Josephine Olivas • Our mentors, David Kennel and Greg Lee • Our instructors, Dane Gardner and Andree Jacobson
Acknowledgments
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Questions??
