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From Jan Høydahl (JIRA) <j...@apache.org>
Subject [jira] [Commented] (SOLR-8207) Modernise cloud tab on Admin UI
Date Thu, 10 May 2018 20:09:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-8207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16471035#comment-16471035
] 

Jan Høydahl commented on SOLR-8207:
-----------------------------------

{quote}How about making it default for Solr 8.0
{quote}
Agree
{quote}Can we change the key name from "Cores" to "Replicas" maybe? 
{quote}
Yea, guess that's the official term in cloud setting, will change
{quote}[heap]  Instead of displaying "Free" would displaying "Max" be more useful ? 
{quote}
 Sure, we can display "Max" and "Used" and pct used.
{quote}I think that physical RAM usage should not be shown in the Solr admin UI
{quote}
In a debugging setting it is useful to know how much physical RAM is on each server. One of
the more common mistakes I see is to allocate 15G to JVM when you have 16G physical. So I
want to display amount of physical mem. Knowing this and the max heap we normally know about
how much free physical mem is left for caching, if Solr is the only major application running
on the host. Still, for consistency I thin we should also show "used" number, and explain
how to interpret in the ref guide and perhaps mouseover.

> 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: node-compact.png, node-details.png, node-hostcolumn.png, node-toggle-row-numdocs.png,
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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