VMware CLOUD DIRECTOR 1.0 Instrukcja Użytkownika Pobierz pdf (Strona 6)

PERFORMANCE STUDY /6

VMware vCloud Director 1.0 Performance and Best Practices

An organization administrator specifies how resources from a provider vDC are distributed to the vDCs in an

organization.

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vCloud Catalogs – Catalogs contain references to virtual systems and media images. A catalog can be shared

to make it visible to other members of an organization, and can be published to make it visible to other

organizations. A vCloud system administrator specifies which organizations can publish catalogs, and an

organization administrator controls access to catalogs by organization members.

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vCloud Cells – vCloud cells are instances of the vCloud Director server. A vCloud cell is made up of several

components, including VC Listener, Console Proxy, Presentation Layer, and others as shown in Figure 2.

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vApp – A vApp is an encapsulation of one or more virtual machines, including their inter-dependencies and

resource allocations. This allows for single-step power operations, cloning, deployment, and monitoring of

tiered applications, which span multiple VMs.

Experimental Setup

Table 1 shows the virtual machines that we configured in our test bed. All VMs ran on Dell PowerEdge R610

machines with 8 Intel Xeon CPUs @2.40GHz and 16GB RAM.

Table 1. Virtual Machine Configuration

OPERATING SYSTEM NUMBER OF

VCPUS

RAM

Cell

64-bit Red Hat Enterprise Linux 5

4 vCPUs 8GB

Cell Database

64-bit Windows Server 2003

vCenter Server

vCenter Database

This section describes performance tuning and sizing recommendations for the Oracle database.

Server Sizing for the Oracle Database

An Oracle database server configured with 16GB of memory, 100GB storage, and 4 CPUs should be adequate for

most vCloud Director clusters.

Database Connection Tuning

Because there is only one database instance for all cells, the number of database connections can become the

performance bottleneck. By default, each cell is configured to have 75 database connections, plus about 50 for

Oracle’s own use. Experiments in this paper used the default setting.

When vCloud Director operations become slower, increasing the database connection number per cell might

improve the performance. If you change the CONNECTIONS value, you also need to update some other Oracle

configuration parameters. Table 2 shows how to obtain values for other configuration parameters based on the

number of connections, where

represents the number of cells in your vCloud Director cluster.

1 2 3 4 5 6 7 8 9 10 11 ... 31 32

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