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7.2 Resources to the virtual machine A VMM provides resources to the virtual machine. These resources can be virtual or real (that is, dedicated resources). Among other resources, the following resources are often mentioned: ► Processor A processor can be dedicated to a VM or shared between VMs. That is, the sum of all virtual processors can exceed the number of physical processors. In this case, a virtual processor represents only a fraction of a physical processor. ► Memory The sum of virtual memory of all VMs can exceed the physical memory. When the sum of all used virtual memory exceeds the physical memory, the VMM must use swap space to provide the necessary memory. Technologies, such as fast swapping devices or page sharing, can minimize these effects. ► Storage Some examples for virtual storage are shared segments, RAM disk, disk or ISO images, or virtual tape (in-memory tape used for caching). IBM System z uses DASDs, such as IBM 3390 disk drives. Because the 3390 disk drives are no longer manufactured, these DASD models are simulations on a modern disk storage. ► Network A physical network is normally a shared resource. However, server groups (for example, projects) must be isolated from other groups. You can establish this network by using virtual LAN (VLAN), which divides a network into many virtual networks. Examples of virtual network elements are a virtual switch, VLAN, or guest LAN. Over commitment: Over commitment occurs when the sum of virtual resources (for example, processor or memory) exceeds the physical resource. The threshold for over commitment depends on other key values, such as workload and concurrent resource usage. z/VM user ID: Every z/VM user ID is a virtual machine. The term guest is often used for the guest operating system started in the z/VM user ID. 7.3 zEnterprise Hypervisor System z provides z/VM as VMMs and LPARs with Processor Resource/System Manager (PR/SM). PR/SM is a type 1 hypervisor integrated with all IBM System z models that transforms physical resources into virtual resources so that many LPARs can share the physical resources. In addition, the zEnterprise System includes virtualization technology that is not System z. That is, a zEnterprise System includes different VMMs and VMMs on different (hardware) architectures. Furthermore, all of these VMMs are managed with a single management system, the IBM zEnterprise Unified Resource Manager. 110 Running SAP Solutions with IBM DB2 10 for z/OS on the IBM zEnterprise System
Currently a zEnterprise System can contain the VMMs listed in Table 7-1. Table 7-1 zEnterprise contained VMM Technology Virtualized component Classification PR/SM System z VMM Type 1 z/VM LPAR (of System z) VMM Type 1 IBM PowerVM IBM POWER7® Blade (IBM zEnterprise BladeCenter Extension (zBX)) VMM Type 1 Chapter 7. Virtualization 111
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ibm.com/redbooks Front cover Runnin
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Note: Before using this information
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2.10.2 IBM zEnterprise BladeCenter
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System software planning. . . . . .
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Trademarks IBM, the IBM logo, and i
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Maxim Kukarev is a Client Technical
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xii Running SAP Solutions with IBM
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1.1 IBM DB2 on System z and SAP The
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technologies, it provides advanced
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1.2.3 SAP Industry Solutions SAP In
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8 Running SAP Solutions with IBM DB
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2.1 SAP NetWeaver composition 2.1.1
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Consequently, the central instances
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► Data layer. The database instan
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Integration ESB / Connectors Figure
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2.4 Rolling maintenance Within one
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2.7 Database server Another compone
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Metro Mirror Figure 2-7 Metro and M
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2.10.4 zEnterprise Ensemble System
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System p or System x AIX, Linux on
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SAP mixed 3-tier structure The data
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3.1 Features implicitly used by SAP
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3.1.4 Scalability improvements for
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Insert time per row in msec. 500,00
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New tables are automatically create
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3.3 SAP modifications to optimize t
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The solution is the Hybrid DBSL, wh
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Figure 3-5 New DBM1 display Enhance
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- Accumulated wait time for global
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The view shown in Figure 3-8 for th
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3.4.1 IN-list in-memory tables DB2
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With DB2 10, the new access type NR
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2. Ensure that the user who is crea
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4.1 Installing Linux on System z, S
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Installing the server from DVD We i
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Verifying the installation In the I
Page 74 and 75: Registration: To access the SAP Ser
Page 76 and 77: Figure 4-4 Support Package list Fig
Page 78 and 79: lnxsu11:t73adm 64> telnet wtsc59oe
Page 80 and 81: 2. Configure the JCL head. From the
Page 82 and 83: 4.2.2 Considerations for migration
Page 84 and 85: Figure 4-8 DB2_V10_CHECK report Imp
Page 86 and 87: 4.2.4 Considerations for data shari
Page 88 and 89: You must make the following changes
Page 90 and 91: lnxsu11 Figure 4-12 SAP system land
Page 92 and 93: Product Vendor Type Version SAP Net
Page 94 and 95: 5.1 Functions of Unified Resource M
Page 96 and 97: 5.2 Simplifying management tasks in
Page 98 and 99: Figure 5-6 DBA Cockpit initial pane
Page 100 and 101: Figure 5-8 Global Times panel Tip:
Page 102 and 103: Figure 5-10 Buffer Pools The Buffer
Page 104 and 105: Table 5-1 highlights the tasks or a
Page 106 and 107: Tip: To enable the capture of syspl
Page 108 and 109: Figure 5-14 AIX monitoring data Fig
Page 110 and 111: ► DB2 Network Stats ABAP report (
Page 112 and 113: 3. Enter the perfkit command to sta
Page 114 and 115: You can also access monitoring data
Page 116 and 117: Example 5-3 Linux memory utilizatio
Page 118 and 119: In addition to user resource utiliz
Page 120 and 121: In a high availability system, ever
Page 122 and 123: 7.1 Classifications of virtualizati
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Page 128 and 129: 8.1 Separation of duties for databa
Page 130 and 131: authority is granted to an entire D
Page 132 and 133: malicious or careless unauthorized
Page 134 and 135: After starting each audit policy, D
Page 136 and 137: 8.3 Writing SQL to audit SAP tables
Page 138 and 139: Example 8-13 shows the audit record
Page 140 and 141: The client and server perform the f
Page 142 and 143: Digital certificates: Digital certi
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Page 146 and 147: Example 8-24 shows the assigned val
Page 148 and 149: 8.5.3 Reasons for establishing trus
Page 150 and 151: Example 8-31 shows the results of a
Page 152 and 153: From the central log of the SAP sys
Page 158 and 159: The SAP implementation process from
Page 160 and 161: Typical roles and tasks for system
Page 162 and 163: Key documentation From the IT and C
Page 164 and 165: Then you see a list of SAP Notes th
Page 166 and 167: SAP Notes The SAP Note system is us
Page 168 and 169: ► SAP on DB2 9 for z/OS: Implemen
Page 170 and 171: participate in the failover automat
Page 172 and 173: As a best practice, use the SAP as
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��
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System software planning SAP on the
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Software product Part number Commen
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Capability Software product Part nu
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� Decide which installation optio
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c. Disable the IEFUSI exit in membe
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3. Optional: Make the directories a
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Additional information: For more in
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11.After finishing the DB2 subsyste
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ARC The archive log data sets. CI T
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DB2 members of the same data sharin
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Figure B-4 illustrates how SAP uses
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OvercommitRatio Virtual Memory vers
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► Set the following z/VM SRM para
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► Separate the SAP private networ
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DB2 10 ZPARMS for SAP Important: Yo
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- SMS constructs and ACS routines -
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Downloading and extracting the web
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PI Process Integration PIT point-in
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SAP Notes Registration required: To
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200 Running SAP Solutions with IBM
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DSNACCOX usage 45 dual-log LG1 and
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untime environment 13 software 162
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206 Running SAP Solutions with IBM
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Running SAP Solutions with IBM DB2
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