Global Configuration Parameters - Detailed descriptions

Here are some global configuration parameters needs to be documented.

We should able to figure out following in the Detailed Description part.

- What is the meaning/purpose of the parameter from an operational viewpoint?
- What is the example use case of the parameter? What kind of side effect can we expect by adjusting the value?
- What is the related component (such as virtual router, Dom0, guest VM) and correspondent configuration?

Global Configuration	Description	Default	unit	Detailed Description
consoleproxy.disable.rpfilter	disable rp_filter console proxy VM public interface	TRUE	N/A
consoleproxy.loadscan.interval	The time interval(in milliseconds) to scan console proxy working-load info	10000	Milli seconds
consoleproxy.session.max	The max number of viewer sessions console proxy is configured to serve for	50	N/A
direct.agent.load.size	The number of direct agents to load each time	16	N/A
guest.domain.suffix	Default domain name for vms inside virtualized networks fronted by router	cloud.internal	N/A
network.gc.interval	Seconds to wait before checking for networks to shutdown	600	Seconds
network.loadbalancer.basiczone.elb.gc.interval.minutes	Garbage collection interval to destroy unused ELB vms in minutes. Minimum of 5	30	Minutes
pool.storage.allocated.capacity.disablethreshold	Percentage (as a value between 0 and 1) of allocated storage utilization above which allocators will disable using the pool for low allocated storage available	0.85	%	This defines the threshold for virtual storage allocated by CloudStack. Upon any request for storage allocation, CS calculates the usage including the requested value and compares with threshold. If it crosses the threshold value then that storage will not be used for allocation.
pool.storage.capacity.disablethreshold	Percentage (as a value between 0 and 1) of storage utilization above which allocators will disable using the pool for low storage available	0.85	%	This defines the threshold for physical storage allocated by CloudStack. In case of thin provisioning of storage, physical storage defines the actual usage not allocated. In case of thick provisioning both allocated storage and physical storage are same. Upon any request for storage allocation, CS calculates the actual usage on storage including the requested value and compares with the threshold value. If it crosses the threshold value then that storage will not be used for allocation.
secstorage.allowed.internal.sites	Comma separated list of cidrs internal to the datacenter that can host template download servers, please note 0.0.0.0 is not a valid site	null	N/A	Add internal subnets from which template registration should be allowed.
sync.interval	Cluster Delta sync interval in seconds	60	seconds
vm.op.cancel.interval	Time (in seconds) to wait before cancelling a operation	3600	seconds
vm.op.cleanup.interval	Interval to run the thread that cleans up the vm operations (in seconds)	86400	seconds
vm.op.cleanup.wait	Time (in seconds) to wait before cleanuping up any vm work items	3600	seconds
vm.op.wait.interval	Time (in seconds) to wait before checking if a previous operation has succeeded	120	seconds
router.check.poolsize	Numbers of threads using to check redundant router status.	10	N/A

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