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https://issues.apache.org/jira/browse/CLOUDSTACK-9377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15297984#comment-15297984
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ASF subversion and git services commented on CLOUDSTACK-9377:
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Commit a38b17fff2da18dc480fed684f84e1e6f03a910b in cloudstack's branch
refs/heads/4.9-bountycastle-daan from [[email protected]]
[ https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;h=a38b17f ]
Merge pull request #1540 from shapeblue/metrics-pagesize-fix
CLOUDSTACK-9377: Fix metrics pagesize issueFixes listing of clusters and host
to list all clusters/hosts by passing
pagesize=-1.
/cc @koushik-das @swill @DaanHoogland -- fixes the issue raised on dev@ ML by
Rashmi
* pr/1540:
CLOUDSTACK-9377: Fix metrics pagesize issue
Signed-off-by: Will Stevens <[email protected]>
> Metrics data incorrectly calculated in zone/cluster metrics view
> ----------------------------------------------------------------
>
> Key: CLOUDSTACK-9377
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9377
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: UI
> Affects Versions: 4.7.0
> Reporter: Rashmi Dixit
> Assignee: Rohit Yadav
> Labels: UI, metrics
> Fix For: 4.9.0
>
>
> In the zone metrics view, listClusters and listHosts APIs are being used to
> compute average used and allocated data for metrics calculations.
> Issue:
> 1. All APIs have a default pagesize. Count of results are always equal to the
> default pagesize if not explicitly passed. The UI is not passing anything
> related to pagesize to these APIs
> 2. Example to explain issue
> 600 hosts in a cluster. Default Page size = 500.
> There is only one call to fetch clusters. This will fetch a maximum of 500
> records. If there are more, then these aren't fetched.
> For each cluster, listHosts is called to fetch hosts. Since page size is 500
> only 500 results are returned.
> Computation for 500 hosts is done but for calculating average this value is
> divided by 600. This is incorrect.
> UI should fetch all hosts in one go and correctly calculate metrics. However,
> this will result in performance degradation as number of hosts/clusters
> increase.
> Ideally a new API needs to be introduced for this metrics calculation.
> Same issue is present in the cluster metrics view.
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