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Transcript of © 2011 IBM Corporation PowerHA SystemMirror for AIX IBM Power Systems.
© 2011 IBM Corporation
PowerHA SystemMirror for AIX
IBM Power Systems
© 2011 IBM Corporation2
Virtualization without Limits Drive over 90% utilization Dynamically scale per demand
Dynamic Energy Optimization 70-90% energy cost reduction EnergyScale™ technologies
Resiliency without Downtime Roadmap to continuous availability High availability systems & scaling
Management with Automation VMControl to manage virtualization Automation to reduce task time
Workload-Optimizing Systems
AIX - The Future of UNIX
Total Integration with i
Scalable Linux ready for x86 Consolidation
Systems for a Smarter Planet
+
Power Your Planet
© 2011 IBM Corporation3
PowerHA SystemMirror
Power Systems High Availability Solution For mission critical application availability through planned and unplanned outage events
Editions targeted at data center and/or multi-site deployments, value grows in feature and function with each new release
Shared Storage Clustering Technology designed for automation and minimal IT operations.
Deep Integration for simplicity and reliability
© 2011 IBM Corporation4
PowerHA SystemMirror Strategy
Deep Integration – Cluster Aware AIX– Kernel based event processing– Centralize cluster topology management
Ease of deployment & ease of use– Systems Director based management– Discovery based deployment– Cluster wide security
Multi-Site & Disaster Recovery– Differentiate with IBM storage– Heterogeneous storage support
Solution Package Optimization – Standard Edition, Enterprise Editions
© 2011 IBM Corporation5
PowerHA SystemMirror Editions
PowerHA SystemMirror Standard Edition
Cluster management for the data center– Monitors, detects and reacts to events– Establishes a heartbeat between the systems– Enables automatic switch-over
IBM shared storage clustering – Can enable near-continuous application service– Minimize impact of planned & unplanned outages– Ease of use for HA operations
PowerHA SystemMirror Enterprise Edition
Cluster management for the Enterprise– Multi-site cluster management – Includes the Standard Edition function
© 2011 IBM Corporation6
Client Need: Data Center
Requirements– Near continuous application service – Recovery Time Objective (RTO) measured in minutes– Recovery Point Objective (RPO) is Zero (no data loss)– Eliminate affects of planned outages
Solution Strategy: – PowerHA SystemMirror Standard Edition
© 2011 IBM Corporation7
Requirements– HA/DR clustering for data center & multi-site operations– Automated role-swap operations – Readily demonstrate remote recoverability compliance
Solution Strategy: – Unified clustering solution for data center & multi-site resiliency– PowerHA SystemMirror Enterprise Edition
Data Center
Remote Site
Client Need Today: Unified HA/DR Solution
© 2011 IBM Corporation9
PowerHA SystemMirror 7.1 for AIX
Standard Edition PowerHA
AIX IT operations skill base
AIX Technical skill support base
AIX Shared Storage management
AIX Volume manager/Mirroring
AIX File System
AIX SMIT Management Tools
AIX Event/error management
AIX DLPAR HA/DR management
Application agents
Director based user interface
AIX Cluster Aware
Kernel based event management
Centralized cluster repository
Triple redundant multi-cast heartbeat
SAN based communications
HA coverage for root Vg storage
Sap LiveCache Hot Standby
Federated Security
PowerHA SystemMirror is differentiated by integration with AIX Cluster Aware
Kernel based event management
PowerHA skills are an extension AIX skills
WW IBM and BP community support PowerHA
© 2011 IBM Corporation10
PowerHA SystemMirror 7.1 for AIX – Key differences
■ Integration with Cluster Aware AIX
■ Heartbeat mechanism
■ Cluster Repository Disk
■ Cluster Command Line, clmgr
■ Systems Director Management Interface
Let’s take a closer look at these differences…
© 2011 IBM Corporation11
Deprecated features in v7.1
All non-IP network types– RS-232,diskhb,mndhb,TMSSA,TMSCSI
IP Network types ATM, FDDI, Token Ring Non-ECVGs Hostname changes IPAT via replacement
– HWAT Heartbeat over Aliasing Two-Node configuration assistant WebSMIT
– Online planning worksheets– Cluster configuration html report
Additional Limitations– Site Support– Cross-site LVM mirroring– IPV6 support– 16-node tested cluster restriction as per the README7.1.0.UPDATE
© 2011 IBM Corporation12
Cluster Aware AIX
AIX-Level Cluster – AIX functionality not PowerHA Provides cluster framework, heartbeating, disk fencing but no failover Available in AIX 6.1 TL6 and AIX 7.1 - bos.cluster.* PowerHA 7.1 hands over heartbeating (previously topology services) to
CAA CAA Cluster definition – on CAA Repository Disk PowerHA Cluster definition – in PowerHA ODM Different commands to query AIX and PowerHA cluster CAA Storage Framework replaces PowerHA non-IP network Also used by
– VIOS SSP
– DB2 PureScale
© 2011 IBM Corporation
Existing – without CAA
© 2011 IBM Corporation
grpsvcs daemon now called cthags
Topology services no longer used
With CAA
© 2011 IBM Corporation15
Cluster Aware AIX - differences
■ Repository disk– Minimum recommended size 10GB– Does not store PowerHA cluster configuration – Requires 4GB or 8GB FC adapters– Documented procedure for changing repository disk – recommended to avoid by proper
planning– Must be highly available / SAN RAIDed / Multipathed– 7.1 does NOT support 3rd party Multipath eg. PowerPath but 7.1.1 (Dec 11) adds
support for EMC PowerPath and Hitachi HDLM■ Sites
– Does not support sites■ Hostname
– CAA requires hostname and nodename must be the same
© 2011 IBM Corporation16
Cluster Aware AIX – differences continued■ 7.1 Requires specific vg and lv naming to be available# lsvg -l caavg_privatecaavg_private:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
caalv_private1 boot 1 1 1 closed/syncd N/A
caalv_private2 boot 1 1 1 closed/syncd N/A
caalv_private3 boot 4 4 1 open/syncd N/A
fslv00 jfs2 4 4 1 open/syncd /clrepos_private1
fslv01 jfs2 4 4 1 closed/syncd /clrepos_private2
powerha_crlv boot 1 1 1 closed/syncd N/A
■ 7.1.1 does NOT require specific vg and lv naming to be available as we no longer have repository disk filesystems
# lsvg -l caavg_privatecaavg_private:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
caalv_private1 boot 1 1 1 closed/syncd N/A
caalv_private2 boot 1 1 1 closed/syncd N/A
caalv_private3 boot 4 4 1 open/syncd N/A
powerha_crlv boot 1 1 1 closed/syncd N/A
© 2011 IBM Corporation17
Cluster Aware AIX – differences continued
■ vSCSI support issues for repository disk– 6.1.6/7.1 does not check disk type
– 6.1.6 SP1 checks and will not allow vSCSI
– 6.1.6 SP2 checks and verifies vSCSI device is indeed SAN based
– NPIV / Fibre OK
■ Uses multicast for monitoring– Requires infrastructure to allow forwarding multicast packets
– Uses SRM (Scalable Reliable Multicast)
– Can test using mping AIX command
■ Heartbeat rates are not tunable– No failure detection rate settings (FDR)
– Completely different to heartbeat over IP used in previous versions
■ Uses internal algorithm to determine health– Does consider things like network/system load
© 2011 IBM Corporation18
“Monitoring” in CAA
Now in kernel space not user space– Higher priority, allows for messages to be sent from node experiencing
extreme resource contention - no DMS
SAN-based communication interface (SFWCOM)– Replaces disk heartbeat
– Uses target mode on HBA
– Also requires creation of VLAN 3358 to create sfwcomX devicedocumentation APAR IV03643 (google finds it)
CAA Repository Disk also used for monitoring, only if all else fails Monitoring is more advanced – many more stats
– Self-adjusting algorithms take into account load and network conditions
– Cannot adjust Failure Detection Rate
Can see all of this in lscluster command
© 2011 IBM Corporation19
Network
SAN
Simple Setup
Multiple channels – Network– SAN– Central Repository
Triple redundant communication pipe
Heartbeats
First line of Defense
Second line of Defense
Third line of Defense Cluster Repository
Default Multi Channel Health Management:
© 2011 IBM Corporation20
SMIT Menu updates
PowerHA SystemMirror
Move cursor to desired item and press Enter.
Cluster Nodes and Networks Cluster Applications and Resources
System Management (C-SPOC) Problem Determination Tools
Custom Cluster Configuration
Can't find what you are looking for ?
Not sure where to start ?
PowerHA SystemMirror
Move cursor to desired item and press Enter.
Cluster Nodes and Networks Cluster Applications and Resources
System Management (C-SPOC) Problem Determination Tools
Custom Cluster Configuration
Can't find what you are looking for ?
Not sure where to start ?
HACMP for AIX
Move cursor to desired item and press Enter.
Initialization and Standard Configuration
Extended Configuration
System Management (C-SPOC)
Problem Determination Tools
Can't find what you are looking for ?
Not sure where to start ?
HACMP for AIX
Move cursor to desired item and press Enter.
Initialization and Standard Configuration
Extended Configuration
System Management (C-SPOC)
Problem Determination Tools
Can't find what you are looking for ?
Not sure where to start ?
New fastpath: smit sysmirrosmit sysmrsmit hacmp (v6.1)
Fastpath hacmp is still valid
© 2011 IBM Corporation21
User Defined Resources
Presently, A user can introduce a new resource type by creating a Application Server.
– PowerHA requires a start/stop/monitor for that resource
However, PowerHA follows a strict pre-known order to handles the resources.
– Volume Groups will be handled first – Application Servers will be handled last.
This approach is not flexible for end users
What’s new in the 7.1 release– User develops “bundle” which includes attributes/verifications/order for
PowerHA etc.– Framework accepts Methods to verify/start/stop/monitor/cleanup/restart
the user defined resource– A xml file can be supplied as input which will be having definition for the
user defined resource type– PowerHA allows to create instances of the user defined resource type
and these instances can be added into RG as resources.
DISK
VOLUME GROUP
FILE SYSTEM
SERVICE IP
APPLICATION
User Defined Resource
Acquisition O
rder
Rel
ease
Ord
er
© 2011 IBM Corporation22
New Dependencies
■ Previously, PowerHA supports only parent-child dependency among Resource Groups.
– Child RG starts after all of its parents start
– Child RG stops before its parents stop
■ Not sufficient to support complex applications like SAP/FileNet– FileNet App Server requires to be started only after database, but no need to be stopped if the DB is
down for sometime
■ What’s new– Two new dependencies introduced in PowerHA 7.1
• STARTAFTER
• STOPAFTER
– Affects how RG started or stopped (New)
– Simplified UI for managing these relations in both SMIT and Director
© 2011 IBM Corporation23
Dynamic Node Priority new Adaptive Fallover
■ Present PowerHA support static/dynamic failover policies– Static: New failover node will be the next node from the node participation list
– Dynamic Node Priority : allows the failover node to be having certain degree of free CPU/memory/IO activity
■ This is not sufficient in some specific cases like SAP Enqueue replication, where RG for Enqueue server need to failover where Enqueue Replication is running.
What’s new in 7.1– Introducing a new dynamic failover policy where, it asks user to supply a script which can dictate
the failover behavior.•The supplied script will be executed on all nodes by PowerHA to know whether the given node can be used as host for failing over RG•Since it is a script, no of checks can be performed by user to let PowerHA know whether the node can be used as a host on a dynamic basis.
The DNP feature is enhanced to support two more policies. The return code of a user-defined script is used in determining the destination node:
– cl_lowest_nonzero_udscript_rc– cl_highest_udscript_rc
© 2011 IBM Corporation24
Rootvg System Event
■ New kernel level monitoring■ Monitors the loss of rootvg■ Defaults response is to log event and reboot causing fallover to
occur■ Smitty sysmirror->Custom Cluster Configuration->Events->System
Events
Change/Show Event Response
Type or select values in entry fields.
Press Enter AFTER making all desired changes.
[Entry Fields]
* Event Name ROOTVG +
* Response Log event and reboot +
* Active Yes +
© 2011 IBM Corporation25
Clmgr – cluster command line
■ Much asked-for feature
■ Very complete, verbose, documented
■ All output logged automatically in clutils.log
■ -l flag does trace logging various levels
■ Can shorten keywords to aliases
■ Can do (almost) everything possible in smitty
■ Can save a huge amount of time in build, config, PD of clusters
■ Used by Systems Director plugin
■ Replaces previous clvt
© 2011 IBM Corporation26
Clmgr – cluster command line
■ Supported actions
– add
– delete
– manage
– modify
– move
– offline
– online
– query
– recover
– sync
– view
Supported object classes
• cluster
• site
• node
• interface
• network
• resource_group
• service_ip
• persistent_ip
• application_controller
• application_monitor
• dependency
• file_collection
• fallback_timer
• volume_group (incomplete coverage)
• logical_volume (incomplete coverage)
• file_system (incomplete coverage)
• physical_volume (incomplete
coverage)
• method (incomplete coverage)
• report
• snapshot
• tape
© 2011 IBM Corporation27
Clcmd – cluster distributed commands
■ /usr/sbin/clcmd
■ Provided by CAA
■ Distributes command to all cluster nodes
– Ease of use
– Reminiscent of dsh from SP2 days
■ Example
– clcmd cat /etc/cluster/rhostsNODE jessica.dfw.ibm.com
-------------------------------
jessica
jordan
-------------------------------
NODE jordan.dfw.ibm.com
-------------------------------
jessica
jordan
© 2011 IBM Corporation28
State-of-the-art interface
– No charge plug-in– Masks complexity– Central management – Real-time status– Smart Assist integration– Deployment wizards
IBM Director: PowerHA Management Interface
© 2011 IBM Corporation31
1 Websphere
2 IBM DB2
3 Oracle Database
4 Oracle Application Server
5 IBM HTTP Server
6 Tivoli Directory Server
7 SAP
8 FIleNet
9 Tivoli Storage Manager (3 Smart Assists)
10 Lotus Domino Server
11 MAXDB
12 Websphere MQ
13 AIX Print Server
14 AIX DHCP
15 AIX DNS
Simplified application availability
– Included in the Standard Edition
Advanced PowerHA agent
– Discover, Configure, and Manage
Support to define and deploy HA policies
– Exploit advanced relationships– Flexible failover policies and resource order
policies– Out of the box start, stop and health monitoring
for common workloads
PowerHA 7.1 Standard Edition Smart Assists
© 2011 IBM Corporation32
PowerHA SystemMirror Announce Highlights October annouce 7.1.1 TL
Deliver new services fasterSAP LiveCache hot standby– Fast failover for SAP
Deliver services with superior economicsEditions grow in value with each product release
– XIV and v7000 support with PowerHA 6.1 EE on AIX– SVC and v7000 support with PowerHA 7.1 EE on IBM I– EMC PowerPath and Hitachi HDLM multi-pathing based
disks supported as repository disks
– 5 year life cycle for PowerHA System Mirror 7.1 on AIX
Deliver higher quality servicesFederated Security– Centralized cluster wide security management
© 2011 IBM Corporation36
Disaster Recover Trends and Directions
LEGACY OPERATIONS Tape based back-up recovery Annual restore from tape exercises
ADVANCED OPERATIONS Data center clustering and Geographically dispersed clustering Semi-annual compliance testing
INTERMEDIATE OPERATIONS Geographic dispersion Data replication Optional compliance testing
RPO minutes RTO hours Manual compliance testing Data-centric recovery
RPO hours if not days RTO hours if not days Manual compliance testing Data-centric recovery
RPO minutes RTO less than an hour Automated compliance testing Application-centric recovery
Storage ReplicationFlash CopyReboot/Restore
No ReplicationRecover from Tape
PowerHA Storage ReplicationFlash CopyAutomation
© 2011 IBM Corporation37
PowerHA SystemMirror 6.1 Enterprise Edition Storage Options for your Enterprise
Sync mode Async mode Active Active Consistency groups
GLVM Yes Yes
XIV Metro Mirror Global Mirror
Storwize® V7000 Metro Mirror Global Mirror
SVC Metro Mirror Global Mirror
DS8800 Metro Mirror Global Mirror
EMC SRDF SRDF
Hitachi TrueCopy
Universal Replicator
TrueCopy
Universal Replicator
Hitachi VSP Truecopy
Universal Replicator
Truecopy
Universal Replicator
HP Storage Works P9500
Continuous Access Software replication
Continuous Access Software replication
Solutions for disaster recovery– Major vendors, popular options– IBM storage options that span the market
© 2011 IBM Corporation38
Two Data Centers
Systems remain active
Disaster recovery for out of region interruptions
Multi-site recovery with no data loss
Two Data Centers
Systems remain active
Enterprise Edition (6.1)
Disaster Recovery within a Metropolitan Region
PowerHA with
GLVM or Metro Mirror
SRDF, Truecopy
RPO=0 & RTO<1 hr
Standard Edition
Continuous Availability within a Data Center
Continuous access to data in the event of a storage
subsystem outage
Single Data Center
Applications remain active
PowerHA with
LVM Mirrors
RPO=0 & RTO=0
PowerHA with
GLVM or Global Mirror
SRDF, Truecopy
RPO secs & RTO <1 hr
Enterprise Edition (6.1)
Disaster Recovery Unlimited Distance
PowerHA SystemMirror Data Resiliency
© 2011 IBM Corporation39 39
DS8000 – IBM’s Flagship Enterprise Class Storage
Superior DR capabilities
Tight integration with IBM i
Reduced bandwidth costs
Lower data loss risk
XIV – Enterprise Class Storage Reinvented
Unique self optimizing grid architecture with extreme ease of use
Enterprise class storage at lower total costs
Metro and Global mirroring and other advanced features at no extra costs
IBM SAN Volume Controller (SVC) – Enterprise Class Virtualized Storage
Market leading Storage Virtualization
Ease of integration / leverage of existing storage infrastructure
Lower storage costs (30% utilization improvement)
Storwize V7000 - New Standard for Midrange Storage
Mid-range storage with enterprise capabilities
Built in storage virtualization for ease of integration
Incredible ease of use
Summary – Best Fit options
© 2011 IBM Corporation41 © Copyright IBM Corporation 2011
PowerHA Webcast V1.0
PowerHA Website– www.ibm.com/systems/power/software/availability/
HACoC (Availability Factory) [email protected]– Contact your IBM representative or an IBM Business Partner.
IBM Technology Service Offering for PowerHA SystemMirror XD deployment – http://www-935.ibm.com/services/us/index.wss/offering/its/a1000032
Redbooks– PowerHA on AIX (SG24-7739-00)– SG24-7841 IBM PowerHA SystemMirror Enterprise Edition – SG24-7845 IBM PowerHA v7.1 – Education: PowerHA for AIX Implementation, Config and Administration AN410 – Go to IBM.com/services/learning (search for AN410 or PowerHA)
Education: Lab Services AN44 Extended Distance and Disaster Recovery– http://www- 304.ibm.com/jct03001c/services/learning/ites.wss/us/en?pageType=course_list&subChapter=194&subChapterInd=S®ion=
us&subChapterName=AIX+high+availability&country=us – http://lpar.co.uk/HA/home.html
GLVM white paper– www.ibm.com/systems/resources/systems_p_os_aix_whitepapers_pdf_aix_glvm.pdf
IBM storage virtualization offerings– www.ibm.com/systems/storage/virtualization
SAP consulting services for POWERHA and POWERVM– [email protected]– [email protected]
Wiki– http://www.ibm.com/developerworks/wikis/display/WikiPtype/High%20Availability
Edison Group Paper– http://theedison.com/pdf/2011_Samples_IBM_PowerHA.pdf
Risk Self Assessment:– www.ibm.com/smarterplanet/us/en/business_resilience_management/overview/index.html?re=2brf24
PowerHA for AIX Resources
© 2011 IBM Corporation42
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Any performance data contained in this document was determined in a controlled environment. Actual results may vary significantly and are dependent on many factors including system hardware configuration and software design and configuration. Some measurements quoted in this document may have been made on development-level systems. There is no guarantee these measurements will be the same on generally-available systems. Some measurements quoted in this document may have been estimated through extrapolation. Users of this document should verify the applicable data for their specific environment.
Revised September 26, 2006
Special notices
© 2011 IBM Corporation43
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Revised December 2, 2010
Special notices (cont.)