Highly Available and Resilient Infrastructure with Oracle VM

Highly Available and Resilient Infrastructure with Oracle VM

Wendy Chen, Senior Systems EngineerRavi Kulkarni, Senior Oracle Database AdministratorDell Inc.

Global Solutions Engineering

Agenda

Overview of Oracle VM ………………………………………………………..…… slide 3

Challenges with Oracle VM Environment at Dell IT ……..…..…… slide 10

Dell EqualLogic iSCSI Storage Systems for Oracle VM ……….…. slide 15

Reference Configuration of DR Solution for Oracle VM .….….. slide 24

Demo ………………………..………………………………………………………….……. slide 28

Thank you …………………………………………………………………………………… slide 29

2


Overview of Oracle VM

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Benefit of Oracle VM

• Server virtualization technology– Increase server consolidation– Improve server utilization– Maximize server efficiency– Lower the cost of infrastructure and operations– Reduce power and space requirements

• Can be deployed on industry standard x86 servers– Support Windows, Linux, and Oracle Solaris as guest OS– Support both Oracle and non-Oracle applications inside guest OS

• Industry standard x86 commodity servers become more powerful– More powerful CPU processors with higher processor core counts– Higher physical memory capacity– Under-utilized servers as a result– OVM increases server utilization and improve efficiency

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Oracle VM Architecture

• Three components:– Oracle VM manager– Oracle VM server– Oracle VM agent

• Two types of virtual machines:– Hardware virtualized– Paravirtualized

5

Source: Oracle


Oracle VM Storage Design – Oracle VM Server (OVS) Repository• OVS repository to store Oracle VM resources: guest VMs, VM

templates, ISO images, virtual disks, etc• In order to enable OVM HA, OVS repository need to reside on

external storage system and formatted as OCFS2 cluster filesystem• /OVS directory is the location of the default OVS repository• /OVS is the cluster root and is a symbolic link to the

/var/ovs/mount/uuid directory• /OVS directory contents:

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Directory Name Description

iso_pool ISO files imported

publish_pool VM deployed as public

seed_pool Virtual machine templates

sharedDisk Shared virtual disks

running_pool VM images and configuration files


Oracle VM Guest VM HA Design

• Server pool: multiple Oracle VM servers grouped together• Server pool master: contact point of the server pool and dispatches

to Oracle VM agents in the pool.

7

Source: Oracle


Oracle VM Guest VM HA Features

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• Guest VM auto restart - minimize downtime during unplanned outages• Secure live migration - minimize downtime during planned outages

Source: Oracle


Shared Storage Systems Considerations

• Shared storage to enable OVM HA features– Guest VM auto restart– Secure live migration

• Oracle VM supports NFS, SAN, iSCSI as shared storage

• Availability and performance of shared storage solution is critical– Increased risk in virtualized environment– Higher data protection requirement in virtualized environment

• Shared external storage systems may provide additional advantages– RAID technology for data protection– Redundant I/O path– Redundant storage array controllers, power supply, etc– Storage replication technologies, eg, snapshot and replication

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Challenges with Oracle VM Environment at Dell IT

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Database Management Practice

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Dell IT Metrics

Technical Ability

Extended

Dell Teams

Operational Excellence

• R & D Roadmap• Technology Communities of Practice

• Specialist advice from experts in the field

• Global Team Operations, 24*7 operations• Automated, standardised proactive health

checks, and performance assessments• Proactive DB Maintenance processes

• Problem Management and Root Cause Analysis• Release and Upgrade Planning

• Industry Leaders in Consolidation & Virtualization

• Experts in Performance tuning, RAC, Oracle Applications, DR etc.

• Near zero downtime capabilities

• Manage Oracle and SQL databases - 10,000 • Total Database Size – 4 Peta bytes• Largest Database - 19TB + DR• Maximum TPS - 1500• # of Oracle Clusters – 500• # of SQL Clusters – 118• Maximum DBs on a Cluster: 185• Consolidated Oracle DBs: 600• Consolidated SQL DBs: 500• Global Operations: 400 DBAs – 6 countries


Oracle Environment

12

Instances: 1937

Oracle Versions


Challenges in Virtualized Databases

• Growing business needs with increased agility and growth of infrastructure – demands for cost efficiencies without compromising availability

• Critical databases cannot be hosted virtualized environments without proven failover mechanisms

• Need an enterprise HA / Disaster Recovery solution for Databases hosted on OVM

• Provide the services without incurring additional cost – leverage capabilities with licensed products

• Transactional Databases need consistent state of data

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HA Features in OVM Databases

• Live Migration and HA - provide redundancy for Guest VMs within a server pool

• OCFS2 clustering – provide Protection against node failures within cluster

• There is no DR (disaster recovery) solution for OVM

• For critical enterprise applications, need storage-based DR solution to protect against the complete stack in the primary datacenter

• Need capability to manage Thin provisioning

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Dell EqualLogiciSCSI Storage Systems for Oracle VM

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Dell EqualLogic iSCSI Storage Array Hardware Features

• iSCSI: storage protocol to carry SCSI command over TCP/IP network

• Support either 10 GbE or 1 GbE Ethernet network

• Support SATA / SAS / SSD disk drives• No Single-Point-of-Failure hardware

– Redundant, hot-swappable components-disks, control modules, power supplies and fans

– Automatic control module fail over and disk sparing without user interventions or interrupting data availability

– RAID for data protection – RAID 5, 6, 10, 50• High performance control modules

– Battery backed cache memory– Control module redundancy: active /

passive relationship between CMs– Scale-out architecture with automatic load

balance

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Dell EqualLogic iSCSI Storage Array Software Features – Thin Provisioning

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Dell EqualLogic iSCSI Storage Array Software Features – Thin Provisioning• Traditional provision method

– storage capacity tend to be over-allocated› Inaccurate growth expectations› Avoid future upgrade complexity

– Low storage utilization rate– Increase capital expenses and operating costs (power, floor space, etc)

• Thin provision method– Increase storage utilization– Reduces the total device purchase cost by making small incremental

purchases› Cost of storage devices continue to decline

– Additional storage added with no interruption to data availability– No changes in OS or application– Can be applied to Oracle VM OVS repository or general storage volumes

utilized by OVM

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Dell EqualLogic iSCSI Storage Array Software Features – Snapshot• Captures the contents of volume at a specific point in time

– Can be used for backups or testing– Does not disrupt access to volume– Space efficient and instantaneous creation

› Use pointers to source volume› Reserve space to preserve original data contents if any writes occur

• Quick backup and restore− Instantaneous point-in-time backup large volumes− backup window to virtually zero− Rapid recovery from logical errors

• Snapshot on volume collection to create content-consistent snapshot of multiple volumes

• Create snapshot manually or automatically by setting up schedule

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Backup Solution using Dell EqualLogicSnapshot

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Dell EqualLogic iSCSI Storage Array Software Features – Replication• Copies volume data from one storage group to another storage

group– Can be used for data protection and disaster recovery– Does not disrupt access to volume– Space efficient and fast creation

› The first replication is a complete volume data transfer› The subsequent replications only transfer the changed data

• Failover− Temporarily host a volume on the secondary group

• Failback– Return the volume to the original primary group

• Create replication manually or automatically by setting up schedule

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Dell EqualLogic Replication Configuration Options

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Disaster Recovery Solution using Dell EqualLogic Replication

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Reference Configuration of DR Solution for Oracle VM using Dell EqualLogicReplication

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Reference Configuration - DR Solution for Oracle VM using Dell EqualLogic Replication

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Reference Configuration – Failover of Oracle Guest VMs

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Reference Configuration – Failback of Oracle Guest VMs

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Demo

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Thank you

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Highly Available and Resilient Infrastructure with Oracle VM

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