scaling and high performance storage system: leofs
DESCRIPTION
LeoFS is an Unstructured Object Storage for the Web and a highly available, distributed, eventually consistent storage system.TRANSCRIPT
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Scaling and High Performance Storage System
Yosuke Hara - @yosukehara A Researcher of R.I.T. and Tech Lead LeoFS with Hiroki Matsue, LeoFS Support and Rakuten Software Engineer
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LeoFS is "Unstructured Big Data Storage for the Web" and a highly available, distributed, eventually consistent storage system. !Organizations can use LeoFS to store lots of data efficently, safely and inexpensively. !
LeoFS was published as OSS on July of 2012
leo-project.net/leofs
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Overview
Brief Benchmark Report
Multi Data Center Replication
LeoFS Administration at Rakuten
Future Plans “NFS” Support and more
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Overview
Tokyo, Japan
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� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �� � � � � � � � � � � � � � � � � � � �
The Lion of Storage Systems
HIGH Availability
HIGH Cost Performance Ratio
HIGH Scalability
LeoFS Non Stop
Velocity: Low LatencyMinimum Resources
Volume: Petabyte / ExabyteVariety: Photo, Movie, Unstructured-data
3 Vs in 3 HIGHs
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Metadata Object Storage
Storage Engine/Router
Monitor
GUI Console
( Erlang RPC)
LeoFS Overview
Storage
Manager
( Erlang RPC)
Gateway
( TCP/IP,SNMP )
Request from Web Applications / Browsers
w/HTTP over REST-API / S3-API
Load Balancer
Keeping High Availability Keeping High Performance Easy Administration
Metadata Object Storage
Storage Engine/Router
Metadata Object Storage
Storage Engine/Router
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Gateway
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LeoFS Overview - Gateway
Stateless Proxy + Object Cache
REST-API / S3-API
Use Consistent Hashing for decision of a primary node
[ Memory Cache, Disc Cache ]
Storage C
lusterG
ateway(s)
Clients
HTTP Request and Response Built in Object Cache Mechanism
Storage Cluster
Fast HTTP Server - Cowboy API Handler Object Cache Mechanism
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Storage
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Storage (S
torage Cluster)
Gatew
ay
LeoFS Overview - Storage
Use "Consistent Hashing" for Data Operation
in the Storage Cluster
Choosing Replica Target Node(s)
RING2 ^ 128 (MD5)
# of replicas = 3
KEY = “bucket/leofs.key”Hash = md5(Filename)
Secondary-1
Secondary-2
Primary Node
"P2P"
WRITE: Auto Replication READ : Auto Repair of an Inconsistent Object with Async
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Request From Gateway
LeoFS Overview - Storage
...
LeoFS Storage
Replicator Recoverer
...
Storage Engine
Storage E
ngine, Metadata + O
bject Storage
Gatew
ay
Storage consists of Object Storage and Metadata Storage Includes Replicator and Recoverer for the eventual consistency
Metadata Storage Object
Storage
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LeoFS Overview - Storage - Data Structure
Metadata
Storage
Object S
torage
Robust and High Performance Necessary for GC
Offset Version Time-stamp Key
<Metadata>
Checksum
for Sync
KeySize CustomMeta Size File Size
for retrieving an object
Footer (8B)
Checksum KeySize DataSize Offset Version Time-stamp Key User-Meta Footer
Header (Metadata - Fixed length) Body (Variable Length)
User-MetaSize
ActualFile
<Needle>
Supe
r-bl
ock
Nee
dle-
1
Nee
dle-
2
Nee
dle-
3
<Object Container>N
eedl
e-4
Nee
dle-
5
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To Equalize Disk Usage in Every Storage NodeTo Realize High I/O efficiency and High Availability
LeoFS Overview - Storage - Large Object Support
chunk-0
chunk-1
chunk-2
chunk-3
An Original Object’s Metadata
Original Object Name Original Object Size # of Chunks
Storage ClusterGatewayClient(s)
[ WRITE Operation ]
Chunked Objects
Every chunked object and metadata are replicated
in the cluster
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Manager
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Storage Cluster
LeoFS Overview - Manager
Monitor
Operate
RING, Node State
status, suspend, resume, detach, whereis, ...
Gateway(s)
Storage C
lusterG
ateway(s)
Manager(s)
Operate LeoFS - Gateway and Storage Cluster "RING Monitor" and "NodeState Monitor"
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Brief Benchmark Report
Hokkaido, Japan
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LeoFS kept in a stable performance through the benchmark
Brief Benchmark Report
Bottleneck is Disk I/O
The cache mechanism contributed to reduce network traffic between Gateway and Storage
Summary of the benchmark results
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Brief Benchmark Report
1st Case: Group of Value Ranges (HDD) Storage:5, Gateway:1, Manager:2 R:W = 9:1
2nd Case: Group of Value Ranges (HDD) Storage:5, Gateway:1, Manager:2 R:W = 8:2
source: https://github.com/leo-project/notes/tree/master/leofs/benchmark/leofs/20140605/tests/1m_r9w1_240min
source: https://github.com/leo-project/notes/tree/master/leofs/benchmark/leofs/20140605/tests/1m_r8w2_120min
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Brief Benchmark Report
CPU Intel(R) Xeon(R) CPU X5650 @ 2.67GHz * 2 (12 cores / 24 threads)
Memory 96GBDisk HDD - 240GB RAID0
Network 10G-Ether
Server Spec - Gateway:
CPU Intel(R) Xeon(R) CPU X5650 @ 2.67GHz * 2 (12 cores / 24 threads)
Memory 96GB
DiskHDD - 240GB RAID0 (System)
HDD - 2TB RAID0 (Data)
Network 10G-Ether
Server Spec - Storage x5:
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Network 10GbpsOS CentOS release 6.5 (Final)
Erlang OTP R16B03-1LeoFS v1.0.2
Environment:
System Consistency Level: [ N:3, W:2, R:1, D:2 ]
Duration 4.0hR:W 9:1
# of Concurrent Processes 64
# of Keys 100,000
Value Size
!!!!!
Benchmark Configuration:
Range (byte) Percentage
1024 10240 24%
10241 102400 30%
10241 819200 30%
819201 1572864 16%
Brief Benchmark Report - 1st Case (HDD / R:W=9:1)
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source: https://github.com/leo-project/notes/tree/master/leofs/benchmark/leofs/20140601/tests/1m_r9w1_240min
50ms
Brief Benchmark Report - 1st Case (HDD / R:W=9:1)
50ms
1,500ops
No Errors
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gateway rxbyt/s gateway txbyt/sstorage-1 rxbyt/s storage-1 txbyt/sstorage-2 rxbyt/s storage-2 txbyt/sstorage-3 rxbyt/s storage-3 txbyt/sstorage-4 rxbyt/s storage-4 txbyt/sstorage-5 rxbyt/s storage-5 txbyt/s
Brief Benchmark Report - 1st Case / Network Traffic
10.0Gbps
7.0Gbps
5.0Gbps
6.0Gbps
StorageG
ateway
60%
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0.00.10.30.40.60.70.91.01.11.31.41.61.71.92.0
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Brief Benchmark Report - 1st Case / Memory and CPU
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gateway storage-1 storage-2 storage-3 storage-4 storage-5
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Network 10GbpsOS CentOS release 6.5 (Final)
Erlang OTP R16B03-1LeoFS v1.0.2
Environment:
System Consistency Level: [ N:3, W:2, R:1, D:2 ]
Duration 2.0hR:W 8:2
# of Concurrent Processes 64
# of Keys 100,000
Value Size
!!!!!
Benchmark Configuration:
Brief Benchmark Report - 2nd Case (HDD / R:W=8:2)
Range (byte) Percentage
1024 10240 24%
10241 102400 30%
10241 819200 30%
819201 1572864 16%
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Brief Benchmark Report - 2nd Case (HDD / R:W=8:2)
60-70ms 80-90ms
1,000ops
No Errors
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Compare 1st case with 2nd case
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7000sgateway rxbyt/s gateway txbyt/sstorage-1 rxbyt/s storage-1 txbyt/sstorage-2 rxbyt/s storage-2 txbyt/sstorage-3 rxbyt/s storage-3 txbyt/sstorage-4 rxbyt/s storage-4 txbyt/sstorage-5 rxbyt/s storage-5 txbyt/s
0100,000200,000300,000400,000500,000600,000700,000800,000900,000
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Brief Benchmark Report7.0Gbps
6.0Gbps7.0Gbps
minus 0.7Gbps
1st Case - Network Traffic
2nd Case - Network Traffic
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storage-1storage-2storage-3storage-4storage-5
100
100
Brief Benchmark Report
2nd Case - Disk util%
200
200
1st Case - Disk util%
1.8x high
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0.00.20.40.60.81.01.21.41.61.82.02.22.42.62.83.0
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0.00.20.40.60.81.01.21.41.61.82.02.22.42.62.83.0
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1.6x high2nd Case - CPU Load 5min
1st Case - CPU Load 5min
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LeoFS kept in a stable performance through the benchmark
Brief Benchmark Report
Bottleneck is Disk I/O
The cache mechanism contributed to reduce network traffic between Gateway and Storage
Conclusion:
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Multi Data Center Replication
Hokkaido, Japan
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TokyoEurope
US
Multi Data Center Replication
HIGH-ScalabilityHIGH-Availability
Easy Operation for Admins+
NO SPOF
NO Performance Degradation
Singapore
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1. Easy Operation to build multi clusters.
2. Asynchronous data replication between clusters
Stacked data is transferred to remote cluster(s)
3. Eventual consistency
Multi Data Center Replication
Designed it as simple as possible
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DC-3DC-2
Storage cluster
Manager cluster
Client
DC-1
Monitors and Replicates each “RING” and “System Configuration”
"Leo Storage Platform"
[# of replicas:1] [# of replicas:1][# of replicas:3]
"join cluster DC-2 and DC-3"
leo_rpcleo_rpc
Multi Data Center Replication
Executing “Join Cluster” on Manager Console
Preparing MDC Replication
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DC-3DC-2
Storage cluster
Manager cluster
Client
Monitors and Replicates each “RING” and “System Configuration”
"Leo Storage Platform"
[# of replicas:1] [# of replicas:1]
Request to the Target Region
Application(s)
DC-1
[# of replicas:3]
Temporally Stacking objects - One container's capacity is *32MB - When capacity is full,
send it to remote cluster(s)* 32MB: default capacity - able to set optional value
leo_rpcleo_rpc
Multi Data Center Replication
Stacking objects
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DC-3DC-2
Storage cluster
Manager cluster
Client
Monitors and Replicates each “RING” and “System Configuration”
"Leo Storage Platform"
DC-1
Stacked an object with a metadata
Compress it with LZ4
Replicated an object
Request to the Target Region
Application(s)
leo_rpc
leo_rpcleo_rpc
Multi Data Center Replication
Transferring stacked objects
Stacked objects
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DC-3DC-2
Storage cluster
Manager cluster
Client
Monitor and Replicate each “RING” and “System Configuration”
"Leo Storage Platform"
Request to the Target Region
Application(s)
DC-1
1) Receive metadata of stored objects 2) Compare them at the local cluster 3) Fix inconsistent objects
leo_rpcleo_rpc
leo_rpcleo_rpc
Multi Data Center Replication
Investigating stored objects
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LeoFS Administration at Rakuten
Presented by Hiroki Matsue Rakuten Software Engineer
Tokyo, JapanKyoto, Japan
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Storage Platform File Sharing Service Others Portal Site
Photo Storage
Background Storage of OpenStack
LeoFS Administration at Rakuten
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Storage Platform
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Storage Platform - Scaling the Storage Platform
(Movie)
Reduce Costs High Reliability Easy to Scale S3-API
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Using Various Services Total Usage: 450TB # of Files: 600Million Daily Growth: 100GB Daily Reqs: 13Million
Storage Platform - Scaling the Storage Platform
E-Commerce
Blog
Insurance Calendar
Recruiting
Review Photoshare
Portal &Contents
Bookmark
B
Storage Platform
(Movie)
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Monitor
GUI Console
( Erlang RPC)
( Erlang RPC) ( TCP/IP,SNMP )
Gatew
ay x 4Storage x 14
Manager x 2
Requests from Web Applications / Browsers
w/HTTP over S3-API
Load Balancer / Cache Servers
Storage Platform - System LayoutTotal disk space: 600TB Number of Files: 600Million Access Stats: 800Mbps (MAX) 400Mbps (AVG)
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Monitor
GUI Console
( Erlang RPC)
( Erlang RPC) ( TCP/IP,SNMP )
Gatew
ay x 4Storage x 14
Manager x 2
Storage Platform - Monitor
Send Mail Alert
Ganglia and Nagios Agent
Status Collection (Ganglia) Status Check (Nagios) Port + Threshold Check
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Storage Platform - Spreading Globally
Covering All Services with Multi DC Replication
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File Sharing Service
+https://owncloud.com/
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+
File Sharing Service - Required Targets
Reduce Costs Handle Confidential Files
Store Large Files Scale Easily
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+
Share Docs and Movies with Group Companies Over 20 Companies, Over 10 Countries
Over 4,000 Users, Over 10,000 Teams
File Sharing Service - Usage
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LDAP
Monitor
GUI Console
( Erlang RPC)
( Erlang RPC) ( TCP/IP,SNMP )
Manager x 2
Authenticate Users
Manage Configurations
Manage Login Session (KVS)
File Sharing Service - System Layout
Web GUI File Browser
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Cover 25 Countries/Regions Over 20,000 Users
+
File Sharing Service - Future Plans
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Empowering the Services and the Users Through the Cloud Storage
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Future Plans
Tokyo, JapanHokkaido, Japan
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NFS SupportFuture Plans
Data-HUB: Centralize unstructured data in LeoFS
Search / AnalysisPaaS / IaaS Photo-Storage
Many Kind of Data PhotoLog / Event Data
Loading Data
Analysis Data
Stream Processing
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SavannaDB for Statistics Data
Retrieve metrics and stats from SavannaDB's Agents
Storage Cluster
ManagerGateway
The Lion of Storage Systems
REST-API (JSON)
Operate LeoFS
Notify a message of over # of req threshold
SavannaDB's Agent Insight LeoFS
LeoInsight
Future Plans
+
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Set Sail for “Cloud Storage”Website: leo-project.net Twitter: @LeoFastStorage Facebook: www.facebook.com/org.leofs