VMware CLOUD DIRECTOR 1.0 Instrukcja Użytkownika Pobierz pdf (Strona 7)

PERFORMANCE STUDY /7

VMware vCloud Director 1.0 Performance and Best Practices

Table 2. Oracle Database Configuration Parameters

ORACLE CONFIGURATION PARAMETER VALUE FOR C CELLS

CONNECTIONS 75 ×

+ 50

PROCESSES = CONNECTIONS

SESSIONS = PROCESSES × 1.1 + 5

TRANSACTIONS = SESSIONS × 1.1

OPEN_CURSORS = SESSIONS

A database administrator can set these values in Oracle.

For more information on best practices for the database, refer to the

vCloud Director Installation and

Configuration Guide

[10] .

Sizing for Number of Cell Instances

vCloud Director can be easily scaled up by adding more cells to the system. We tested with up to 12 cell instances

with 10 fully loaded vCenter Server instances.

For this experiment, the Oracle database instance ran in a host with 12 cores and 16GB RAM. Each cell ran in a

virtual machine with 2 vCPUs and 4GB RAM.

In general, we recommend:

number of cell instances = n + 1 where n is the number of vCenter Server instances

This formula takes into account the considerations for VC Listener (which helps keep the vCenter Server

inventory up-to-date in the vCloud Director database), cell failover, and cell maintenance. In “Inventory Sync” on

page 23, we recommend a one-to-one mapping between VC Listener and the vCloud cell. This ensures the

resource consumption for VC Listener is load balanced between cells. We also recommend having a spare cell for

cell failover. This keeps the load of VC Listener balanced when one vCloud Director cell fails or is powered down

for routine maintenance.

We assume here that the vCenter Server instances are managing a total of more than 2000 VMs. If the vCenter

Server instances are lightly loaded, multiple instances can be managed by a single vCloud Director cell. For cases

where vCenter Server is lightly loaded, use the following sizing formula:

number of cell instances = n ÷ 3000 + 1 where n is the number of expected powered on VMs

For more information on the configuration limits in vCenter Server 4.0 and 4.1, refer to

VMware vCenter Server

4.0 Configuration Limits

[4],

VMware vCenter Server 4.1 Configuration Limits

[5], and

VMware vCenter Server 4.1

Performance and Best Practice

[6].

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VMware CLOUD DIRECTOR 1.0 Instrukcja Użytkownika Strona 7