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https://issues.apache.org/jira/browse/SOLR-8207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16448243#comment-16448243
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Jan Høydahl commented on SOLR-8207:
-----------------------------------
Ok, I got a bit further, see [GitHub Pull Request
#360|https://github.com/apache/lucene-solr/pull/360] for code. The screenshot
below is a *live* view of data captured from 6 nodes running on my Mac:
* Proxying SystemInofHandler call and MetricsHandler call through localhost to
all other Solr nodes
* Pulling various data and metrics from the APIs and plotting in the table
** Under node name is server-level data such as OS, version, JVM, physical
RAM, CPUs
** Uptime is JVM uptime for this Solr node
** Load, CPU & heap as reported by system handler (per-process)
** Disk is based on {{CONTAINER.fs.totalSpace}} - not per core. Not sure if we
get {{solr.data.dir}} space here as well as {{solr.solr.home}} space??
** GC is number of major collections
(solr.jvm.{{gc.ConcurrentMarkSweep.countper}}) 5min since JVM start and the
same for minor collections ({{solr.jvm.gc.ParNew.count}})
** Requests is from
{{solr.jetty.org.eclipse.jetty.server.handler.DefaultHandler.get-requests}},
i.e. not per core but for jetty overall, and we show requests per minute 1min
rate and 95 percentile latency
** Collections and cores simply list what runs on the node. Cores link to the
Admin of that node.
* Some mouse-overs (title attr) for more details on many metrics. Plan to also
create a CSS popup with the raw JSON for each node
!nodes-tab-real.png|width=1100!
TODO:
* Limit number of collections/cores displayed, now all are listed
* Add a refresh button
* Add possibility to sort by other columns
* Add some graphical gauges in place of the percentages??
* Should the collection names link somewhere?
* Should we show #docs somewhere? Per core or per node? As well as avg
size/doc?
Feel free to take it for a spin by cloning the Github fork or checking out [the
patch
file|https://patch-diff.githubusercontent.com/raw/apache/lucene-solr/pull/360.patch]
> Modernise cloud tab on Admin UI
> -------------------------------
>
> Key: SOLR-8207
> URL: https://issues.apache.org/jira/browse/SOLR-8207
> Project: Solr
> Issue Type: Improvement
> Components: Admin UI
> Affects Versions: 5.3
> Reporter: Upayavira
> Assignee: Jan Høydahl
> Priority: Major
> Attachments: nodes-tab-real.png, nodes-tab.png
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The various sub-tabs of the "Cloud tab" were designed before anyone was
> making real use of SolrCloud, and when we didn't really know the use-cases we
> would need to support. I would argue that, whilst they are pretty (and
> clever) they aren't really fit for purpose (with the exception of tree view).
> Issues:
> * Radial view doesn't scale beyond a small number of nodes/collections
> * Paging on the graph view is based on collections - so a collection with
> many replicas won't be subject to pagination
> * The Dump feature is kinda redundant and should be removed
> * There is now a major overlap in functionality with the new Collections tab
> What I'd propose is that we:
> * promote the tree tab to top level
> * remove the graph views and the dump tab
> * add a new Nodes tab
> This nodes tab would complement the collections tab - showing nodes, and
> their associated replicas/collections. From this view, it would be possible
> to add/remove replicas and to see the status of nodes. It would also be
> possible to filter nodes by status: "show me only up nodes", "show me nodes
> that are in trouble", "show me nodes that have leaders on them", etc.
> Presumably, if we have APIs to support it, we might have a "decommission
> node" option, that would ensure that no replicas on this node are leaders,
> and then remove all replicas from the node, ready for it to be removed from
> the cluster.
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