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© 2009 IBM Corporation
2009 하반기 SMA 세미나HACMP Best Practices
2009. 10. 15.백진훈 ([email protected])MTS, GTS, IBM Korea
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© 2009 IBM Corporation
목차
’’
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© 2009 IBM Corporation
•
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© 2009 IBM Corporation
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• “…A fundamental design goal of (successful) cluster design is the elimination of single points of failure (SPOFs) through appropriate design, planning, selection of hardware, configuration of software, and carefully controlled change management discipline.…”
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High Availability does not mean no interruption to the application thus we say,
fault resilient instead of tolerant.
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• “…A fundamental design goal of (successful) cluster design is the elimination of single points of failure (SPOFs).…”
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© 2009 IBM Corporation
’’
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© 2009 IBM Corporation
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RG1 (NodeA, NodeB)
NODE A NODE B
StorageSubsystem
Topology Components:• Cluster name• Node Names• IP Network
• Interfaces• Serial Network
Types of Resources• Service IP• Volume Group/s• Application Server
Resource Components:• Resource Group/s
• Policies - startup - fallover - fallback
• Dependencies• Parent / Child• Location
RG2 (NodeB)
Service IPVolume GroupDevelopment App
Cluster Name: Cluster 1
Network: net_ether0
Network: rs232_net
Network: diskhb_net
Service IPVolume GroupProduction App
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© 2009 IBM Corporation
RG1 (NodeA, NodeB)
NODE A NODE B
StorageSubsystem
RG2 (NodeB)
Service IPVolume GroupDevelopment App
Cluster Name: Cluster 1
Network: net_ether0
Network: rs232_net
Network: diskhb_net
Service IPVolume GroupProduction App
Location Dependencies:- RGs can coexist on same node- RGs can coexist on different nodes
- Can also set Priorities:- High- Intermediate- Low
Diagram Assumptions:RG1 – High PriorityRG2 – Low Priority
On Fallover:- RG2 Offline- RG1 will move to Node B
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© 2009 IBM Corporation
RG1 (NodeA, NodeB)
NODE A NODE B
StorageSubsystem
RG2 (NodeB, NodeA)
Service IPVolume GroupApplication 2
Cluster Name: Cluster 1
Network: net_ether0
Network: rs232_net
Network: diskhb_net
Service IPVolume GroupApplication 1
Environment:- Each Machine is running its own Production application - Node A fails to Node B - Node B fails to Node A
Fallover Behavior:- On fallover the target machine will need enough CPU & memory resources in order to handle the load of both applications
RG2 (NodeB, NodeA)
Service IPVolume GroupApplication 2
RG1 (NodeA, NodeB)
Service IPVolume GroupApplication 1
ONLINE
ONLINE
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© 2009 IBM Corporation
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© 2009 IBM Corporation
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I/O drawer
I/O drawer
I/O drawer
I/O drawer
I/O drawer
1
2
3
4
5
6
7
8
9
10
Ie 2. Two nodes sharing I/O drawer
Ie 1. SCSI adapters for rootvg on same BUS
Real Customer Scenarios:
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…………………………
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© 2009 IBM Corporation
Planar 1 Planar 2
rootvg
11
fcs2
ent4
1
ent48
ent8
fcs3
fcs4
fcs0
fcs1
ent16
ent20
ent12
SA0
fcs7
fcs6
fcs15
fcs8
fcs5
EmpTy
EmpTy
EmpTy
2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10
fcs11
ent24
1
ent28
ent32
fcs12
fcs13
fcs9
fcs10
ent40
ent44
ent36
SAS0
fcs17
fcs16
fcs19
fcs18
fcs14
EmpTy
EmpTy
EmpTy
2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10
L8 L9 L10 L11
L8 L9 L10 L11
L8 L9 L10 L11
L8 L9 L10 L11
T6
Planar 2 Planar 1
T5 T6 T5
rootvg
00
rootvg
22
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© 2009 IBM Corporation
–“”
p595
20GB
30GB
30GB
rootvg X1
X4
X3
datavg
appvg
I/O drawer * 2ea
16 core
60GB
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VS.
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––
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–
–““
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––
–
––
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“
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–
–
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– ––
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– – –
’
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–
–
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※
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ThinkC en ter
1 394
P72
Th inkC enter
1 394
P72
ThinkC en ter
1394
P72
ThinkC enter
139 4
P72
SVC
SVC
DWDM(FC Extender)
DWDM(FC Extender)
SVC/ Metro-Mirroring(Syncronous PPRC)
HACMP/ XD
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FRAME 1
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In virtualized environments:
9.12.4.11
9.12.4.13
9.12.4.11
!REQD en2 100.12.7.9
9.12.4.13
!REQD en2 100.12.7.10-
Typical File:
Most adapters will use netmon in the traditional manner, pinging 9.12.4.11 and 9.12.4.13 along with other local adapters or known remote adapters, and will only care about the interface's inbound byte count for results.
interface en2 will only be considered up if it can ping either 100.12.7.9 or 100.12.7.10
Note:There are additional !REQD formats that may be used within the netmon.cf file outlined in the description of APAR IZ01332
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Do’s
‘’
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