Tuning Options

These options are usually the same for all grids on the LAN. All of them have defaults, which rarely require modification. If modifications are necessary, do them in a configuration file on the distribution server. Specify the configuration file name on the aldo command line for reuse.

timezone

Specifies the name of the time zone information file that you want to use on all grid servers and on the controller. The value of this parameter can be any valid time zone name, which is a file name relative to the time zone directory (usually /usr/share/zoneinfo).

In addition, the following special value is recognized:

dist sets the time zone to that of the distribution server itself.

Default: dist

Examples: US/Pacific, Africa/Timbuktu, or Iceland

SC_primary_memory,SC_max_memory,SC_online_memory,GC_primary_memory, GC_max_memory, GC_online_memory

These parameters refer to virtual machine memory for the server and grid controllers.

They are provided in the following format:

<param>=<n><unit>

where ‘param’ is the parameter name, ‘n’ is the amount of memory in the given unit ‘u’.

Only ‘M’ (megabytes), ‘G’ (gigabytes) and ‘T’ (terabytes) units are supported.

Example:

aldo set grid=Grid16 SC_online_memory=768M GC_online_memory=1024M

The command does perform sanity checks on the resulting memory settings.

If one of the following conditions does not apply, it fails:

Maximum memory must be greater than primary memory.
Maximum memory must be greater than online memory.

It performs the following adjustments if required:

If the online memory is smaller than the primary memory, it is adjusted to be at least the primary memory size.
The online memory is aligned according to the memory block size supported by the controller. Unaligned values are replaced by the next higher aligned value.

In the output of an aldo info command, these memory values are now displayed. They are shown in megabytes.

catalogs

Specifies a comma-separated list of global catalogs that you want to install on new grids. The catalog name can be specified either as a plain name, in which case the latest version available is installed. The value can also be name-version (for example, system-0.9.2).

Default: system,user,filer

applications

Specifies a comma-separated list of applications that you want to install on new grids. This list includes sample applications and production applications that are available on the distribution server. Name format is the same as for catalogs.

To disable installing of sample applications, set this parameter to an empty value.

Default: Sys Filer Linux, VDS CentOS62

volumes

Specifies a comma-separated list of template volumes that you want to install on the grid. This setting applies only to the new and upgrade commands. Under a normal setup, do not set this parameter. Let ALD use the release-specific default value.

Default: Version-specific

max_pub_macs

Specifies the maximum number of virtual network adapters that the grid is allowed to provision on the front-end network for running applications. If starting a new application would exceed this limit, the application start is aborted. Lower this setting from its default for the following conditions:

Multiple grids are sharing the front-end network switch.
The switch lookup tables cannot hold that many MAC addresses.

Note: Exceeding the switch hardware limit causes an increase in the number of packets that are broadcasted to all ports. This increase can severely affect performance.

Default: 8000

max_bkb_macs

Specifies the maximum number of virtual network adapters that the grid is allowed to provision on the grid backbone for running applications. If starting a new application would exceed this limit, the application start is aborted. Lower this setting from its default for the following conditions:

Multiple grids are sharing the backbone network switch.
The switch lookup tables cannot hold that many MAC addresses.

Default: 8000

desc_write_enabled

Specifies whether to enable the Edit Descriptor command. Setting this parameter to 0 disables the Edit Descriptor command in the GUI.

Default: 1 (enabled)

ipbase

Specifies the base address for the IP address space that the grid appliances use. The value is a valid Class A subnet address (that is, it must have the form x.0.0.0). The only useful values are the default 10.0.0.0 and 1.0.0.0 (which is nominally a routable subnet but which public servers do not use). Change this value from its default only if the grids are being installed in an environment where 10.x.x.x subnet is already in use.

Default: 10.0.0.0