Live Migration VERITAS Cluster Server
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Live Migration VERITAS Cluster Server
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Transcript of Live Migration VERITAS Cluster Server
Live MigrationVERITAS Cluster Server
Planned Downtime is Painful…
• Gartner states 70% of application and database downtime is caused by planned outages..– Application Upgrades– OS Upgrades– Server Maintenance
• Sys-Admins perform maintenance after-hours and on weekends
“The biggest near-term customer pain-point I see is related to planned migrations and avoiding or reducing planned
downtime.” – Donna Scott, 2005 Gartner / VERITAS Interview
“The biggest near-term customer pain-point I see is related to planned migrations and avoiding or reducing planned
downtime.” – Donna Scott, 2005 Gartner / VERITAS Interview
VCS Live Migration Addresses Planned Downtime
• Live Migration provides stateful relocation of applications across physical servers
– Client connections remain uninterrupted during migration
• Business Value:– Perform server maintenance during normal business hours– Reduce associated Application Server outages– Increase server utilization through moving applications based on
changing resource requirements
“83% of customers considered the need to keep applications running during server maintenance an ‘absolute must do’ or important in their environment.”
– Tier 1 Research UC and Virtualization Survey, 2005
“83% of customers considered the need to keep applications running during server maintenance an ‘absolute must do’ or important in their environment.”
– Tier 1 Research UC and Virtualization Survey, 2005
Live Migration is an Evolution of HA• Provides a logical extension to the VCS paradigm:
• Non-application intrusive
• Uses native VCS agent framework
• Supports mission critical Oracle databases
• No competitive technology exists on the Solaris platform
App Servers
Database
Web
VCS Live Migration
• Targets market-leading App Server environments:
– IBM Websphere– BEA Weblogic
• Where Oracle databases are used on Solaris
Live Migration is a Key Enabler of a Dynamic Data Center
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CPUs
Equ
ival
ent
Time
• Applications have variable and unpredictable demand
• Servers are over-provisioned to handle variableness and potential growth
• Live Migration can move applications based on changing resource requirements
“Since utility computing is more than just a server utilization strategy, the vision and promise of utility computing and the
dynamic data center cannot be complete without the capabilities provided by application virtualization such as stateful
application relocation.” – Tier 1 Research, 2005
“Since utility computing is more than just a server utilization strategy, the vision and promise of utility computing and the
dynamic data center cannot be complete without the capabilities provided by application virtualization such as stateful
application relocation.” – Tier 1 Research, 2005
Technology Behind VCS Live Migration
• Application virtualization enables application mobility..
• Virtualizes Application for Migration:
– Process– Memory– Network – File system
• A point-in-time snapshot of the database is taken during the Live Migration process
VCS Live MigrationThe Live Migration Process
1. Create the Application Container Process Virtualization Network Virtualization Temp File System Virtualization
2. Snapshot the Database Save State to Disk
3. Restore the Database
VCS Live MigrationInstall and Configure VCS with Oracle
Hardware
Operating System
VERITAS Cluster Server
Application Container
Oracle Database
2.
3.
1.
1. Install Oracle on the server using shared storage (SAN)
2. Configure Oracle with VCS
3. VCS starts Oracle within an Application Container
• VCS is not in the Oracle data path..
Operating System
Hardware
Application Container
VCS Live MigrationApplication Virtualization Container
Oracle Processes and Associated State
Forked Process
Forked Process
Temp File System
Virtualization
Process Virtualization
Network Virtualization
Terminology
• A snapshot is a point-in-time capture of an application’s processes and their associated state
• Application is captured live, active TCP connections are preserved
• Snapshots are saved to disk
Operating System
VERITAS Cluster Server
Application Container
Oracle Database
Application Container
VCS Live MigrationVirtualization of Process State
Hardware
Operating System
PID USER SIZE RES STATE TIME CPU COMMAND 6235 root 2280K 1528K cpu 0:00 0.30% top1051019 oracle 210M 9552K sleep 0:27 0.14% oracle1051029 oracle 207M 23M sleep 1:40 0.11% oracle 135 root 2400K 1720K sleep 1:09 0.11% inetd 292 root 2472K 2008K sleep 0:45 0.05% mibiisa 6034 root 1832K 1208K sleep 0:00 0.00% ksh1051023 oracle 206M 29M sleep 0:05 0.00% oracle 1 root 792K 376K sleep 0:04 0.00% init1051027 oracle 206M 15M sleep 0:01 0.00% oracle1051025 oracle 206M 15M sleep 0:01 0.00% oracle1051021 oracle 206M 11M sleep 0:01 0.00% oracle 138 daemon 2504K 1776K sleep 0:00 0.00% statd 295 root 1808K 1256K sleep 0:00 0.00% in.rlogind
PID USER SIZE RES STATE TIME CPU COMMAND 6235 root 2280K 1528K cpu 0:00 0.30% top1051019 oracle 210M 9552K sleep 0:27 0.14% oracle1051029 oracle 207M 23M sleep 1:40 0.11% oracle 135 root 2400K 1720K sleep 1:09 0.11% inetd 292 root 2472K 2008K sleep 0:45 0.05% mibiisa 6034 root 1832K 1208K sleep 0:00 0.00% ksh1051023 oracle 206M 29M sleep 0:05 0.00% oracle 1 root 792K 376K sleep 0:04 0.00% init1051027 oracle 206M 15M sleep 0:01 0.00% oracle1051025 oracle 206M 15M sleep 0:01 0.00% oracle1051021 oracle 206M 11M sleep 0:01 0.00% oracle 138 daemon 2504K 1776K sleep 0:00 0.00% statd 295 root 1808K 1256K sleep 0:00 0.00% in.rlogind
PID 1051019
Process State
Virtual Memory File
Virtual Memory File
Temp File System
Virtualization
Process Virtualization
Network Virtualization
PID 1051029
PID 1051023
PID 1051019
PID 1051027
PID 1051025
PID 1051021
Process Snaplist
Freeze Processes
and associated
memory segments
1.
2. w Save Process State to Disk
Oracle Processes and Associated State
VERITAS Cluster Server
Application Container
Oracle Database
Application Container
VCS Live MigrationVirtualization of Network State
Hardware
Temp File System
Virtualization
Process Virtualization
1. w Hold & Queue Active Connections
Oracle Processes and Associated State
TCP/IP
Connection Filter
Database Transaction
Network Interface
Network Virtualization
2. w Save Connection State to Disk
Connection Filter
• Migrates TCP connections
• ARP Handling
• Port / Seq # Translation
Operating System
VERITAS Cluster Server
Application Container
Oracle Database
Application Container
VCS Live MigrationVirtualization of Temp File System
Oracle Processes and Associated State
Temp File System
Virtualization
Process Virtualization
Network Virtualization
Hardware
/var
tmp
Temp File System
Multiplexer
Oracle temp System temp
App2 temp
• Multiplexer redirects specific local directories to shared storage
• Allows temp files to move with application
• Uses a distributed loopback file-system
1. w Temp files relocate with application
Operating System
VERITAS Cluster Server
Application Container
Oracle Database
VCS Live MigrationSummary: The Live Migration Process
Hardware
Operating System
VERITAS Cluster Server
Hardware
Operating System
VERITAS Cluster Server
Application Container
Oracle DatabasePID USER SIZE RES STATE TIME CPU COMMAND6235 root 2280K 1528K cpu 0:00 0.30% top
1051019 oracle 210M 9552K sleep 0:27 0.14% oracle1051029 oracle 207M 23M sleep 1:40 0.11% oracle
135 root 2400K 1720K sleep 1:09 0.11% inetd292 root 2472K 2008K sleep 0:45 0.05% mibiisa
6034 root 1832K 1208K sleep 0:00 0.00% ksh1051023 oracle 206M 29M sleep 0:05 0.00% oracle
1 root 792K 376K sleep 0:04 0.00% init1051027 oracle 206M 15M sleep 0:01 0.00% oracle1051025 oracle 206M 15M sleep 0:01 0.00% oracle1051021 oracle 206M 11M sleep 0:01 0.00% oracle
138 daemon 2504K 1776K sleep 0:00 0.00% statd295 root 1808K 1256K sleep 0:00 0.00% in.rlogind
1. Snapshot Process and Memory State
• Save State to Disk
2. Snapshot Active Network Connections
• Save Connection State to Disk
3. Dismount Filesystem
4. Re-mount Filesystem on Secondary Host
Primary Secondary
Application Container
Oracle DatabasePID USER SIZE RES STATE TIME CPU COMMAND6235 root 2280K 1528K cpu 0:00 0.30% top
1051019 oracle 210M 9552K sleep 0:27 0.14% oracle1051029 oracle 207M 23M sleep 1:40 0.11% oracle
135 root 2400K 1720K sleep 1:09 0.11% inetd292 root 2472K 2008K sleep 0:45 0.05% mibiisa
6034 root 1832K 1208K sleep 0:00 0.00% ksh1051023 oracle 206M 29M sleep 0:05 0.00% oracle
1 root 792K 376K sleep 0:04 0.00% init1051027 oracle 206M 15M sleep 0:01 0.00% oracle1051025 oracle 206M 15M sleep 0:01 0.00% oracle1051021 oracle 206M 11M sleep 0:01 0.00% oracle
138 daemon 2504K 1776K sleep 0:00 0.00% statd295 root 1808K 1256K sleep 0:00 0.00% in.rlogind
5. Page Fault Process and Memory state into Secondary Host
6. Resume TCP Connections
VCS Live MigrationSummary: The Live Migration Process
1. Create the Application Container2. Snapshot the Database
Freeze Processes and Memory Save State to Disk
Queue and Hold Active Connections Save State to Disk
3. Restore the Database Redirect File System Locations Page Fault Process and Memory state into
secondary node Resume TCP connections
Capabilities and Platform Support
Capabilities:• Integrated into VCS Java GUI for
seamless look & feel• Wizard-based configuration• Upgrade existing Oracle configuration• Generic ‘native OS’ services support, for
connection persistence of FTP, NFS, etc (TBD)
Platform and Application Support:• Solaris 9 / Oracle 9 (CAP)• Plus Solaris 10 / Oracle 10 (Planned for
GA)
CAP and Release Timeframe
Customer Access Program:• Begins in August 2005• Based in VCS 4.1 for Solaris• We are accepting customers now..
• http://cap.veritas.com
Release Timeframe:• Full release with or near UxRT 5.0 (Q2 ’06)• Support for Database Editions
&ANSWERS
QUESTIONS
