Ernest Allen created DISPATCH-911:
-------------------------------------
Summary: New management call to return overall router network
statistics
Key: DISPATCH-911
URL: https://issues.apache.org/jira/browse/DISPATCH-911
Project: Qpid Dispatch
Issue Type: Improvement
Components: Management Agent
Affects Versions: 1.0.0
Reporter: Ernest Allen
We need overview charts that display:
- the throughput rate for the router network
- network load
- average latency
For the throughput rate:
This is derived from the sum of router.address.deliveriesEgress for all
addresses on all routers in the network.
For network load:
This is derived from the sum of the router.link.undeliveredCount and
router.link.unsettledCount for all endpoint links on the network.
For the average latency:
A new attribute needs to be created. Each ingress message needs to be annotated
with an ingress timestamp. When the message egresses the network, the total
time 'in-flight' needs to be calculated and accumulated in the egress router's
new router.address.deliveriesEgressDuration attribute. Average latency can be
calculated using this statistic and the throughput statistic.
Add a new management action of "SUM" that recognizes a new application_proptery
of filter. The SUM action sums the given attribute(s) from all routers. The
filter determines which records are included.
To calculate load, the request looks like:
{
body: ['undeliveredCount', 'unsettledCount'],
application_properties: {
operation: 'SUM',
type: 'org.apache.qpid.dispatch.router.link',
filter: {'linkType': 'endpoint'}
}
}
This would return:
{
attributeNames: ['undeliveredCount', 'unsettledCount'],
values: [<sum of undeliveredCounts>, <sum of unsettledCounts>]
}
where the sums are for all routers for all links with linkType == endpoint
For the throughput request:
{
body: ['deliveriesEgress'],
application_properties: {
operation: 'SUM',
type: 'org.apache.qpid.dispatch.router.address',
filter: {'name': '*'} // or name: <address.name> for a single address
}
}
This would return:
{
attributeNames: ['deliveriesEgress'],
values: [<sum of deliveriesEgress>]
}
where the sum is for all routers for all address.names that matched the name
given in the filter.
For the latancy request:
{
body: ['deliveriesEgress', 'deliveriesEgressDuration'],
application_properties: {
operation: 'SUM',
type: 'org.apache.qpid.dispatch.router.address',
filter: {'name': '*'} // or name: <address.name> for a single address
}
}
This would return:
{
attributeNames: ['deliveriesEgress', 'deliveriesEgressDuration'],
values: [<sum of deliveriesEgress>, <sum of deliveriesEgressDuration>]
}
where the sums are for all routers for all address.names that matched the name
given in the filter.
Note: If annotating messages with timestamps for the deliveriesEgressDuration
attribute is too much of a performance hit, an additional management call is
needed to enable and disable this behavior.
Bonus: This new 'SUM' request can be used to replace the existing request that
sums logStats accross routers.
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