hi,
many thanks for the reply. I am interested in measuring the provider api
response (priority is in Amazon, nice to have extension would be Google
compute).
I see in the EC2ListNodesStrategy class this part:
public Set<? extends ComputeMetadata> listNodes() {
return listDetailsOnNodesMatching(NodePredicates.all());
}
probably it gets all right? this would seem reasonable since the calls
are measured to take ~20 seconds
On 4/1/2015 12:01 AM, Ignasi Barrera wrote:
The listNodes method can do more than one call, depending on the
provider. Some providers just return partial data when listing, some
return the entire node data. In the former, jclouds will perform a get
operation on each returned node to return a list of fully populated
objects, so the metrics could be biased depending on the provider.
Are you trying to measure how much it takes to jclouds to get the list
of nodes or are you trying to measure how fast the provider api
responds? You can do the latter by configuring an interceptor at the
http driver level.
On 31 March 2015 at 20:07, George Kousiouris <[email protected]
<mailto:[email protected]>> wrote:
Hi all,
I want to check out the response time of provider APIs to a
request for retrieving the server list. I use the following piece
of code to get it and afterwards in order to search in the
metadata e.g.
ComputeServiceContext context = ContextBuilder.newBuilder(provider)
.credentials(user, apiKey)
.buildView(ComputeServiceContext.class);
ComputeService computeService = context.getComputeService();
*//checkpoint 1**---startTime*
Set<? extends ComputeMetadata> localCS=computeService.listNodes();
*//checkpoint2---EndTime*
context.close();
List<? extends ComputeMetadata> NodeList = new ArrayList(localCS);
for (ComputeMetadata node : localCS) {
node.getName();
NodeMetadata metadata =
computeService.getNodeMetadata(node.getId());
Are the check points included valid? From what i understand the
initial lines before checkpoint1 are just for preparation, while
the actual call is made in the computeService.listNodes() line.
And afterwards (after checkpoint2) the metadata in e.g.
computeService.getNodeMetadata(node.getId()) are taken from the
local response, right?
Cheers,
George
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