Re: SolrCloud one server with high load

[Muwonge Ronald]

Reinstall it. If the hardware is the same.

On Mon, 4 Mar 2019, 20:45 Gael Jourdan-Weil, <
gael.jourdan-w...@kelkoogroup.com> wrote:

> Hi Erick,
>
> We are running Solr 7.6.0.
> We recently upgraded from 7.2.1 but we already had theses issues with Solr
> 7.2.1.
>
> Is the overseer different from the leader?
> In the Solr Admin UI > SolrCloud > Tree > overseer > leader file I can see
> the machine being the leader is not the one having issues right now.
>
> Kind Regards,
> Gaël
>
> 
> De : Erick Erickson 
> Envoyé : lundi 4 mars 2019 17:57
> À : solr-user@lucene.apache.org
> Objet : Re: SolrCloud one server with high load
>
> What version of Solr? There are some anecdotal reports of abnormal CPU
> loads on very recent Solr’s.
>
> Is the server with the high load the “Overseer”? In the admin
> UI>>SolrCloud>>tree you can see which node is the Overseer. This is really
> a shot in the dark, as unless you are doing a lot of collection maintenance
> operations, the Overseer shouldn’t be doing much really.
>
> There is _one_ Overseer per cluster and it’s in charge of coordinating
> changes to ZooKeeper.
>
> If there’s a correlation there, it’d be great to know. It’s possible to
> move the Overseer to a different node, one that’s running Solr but not
> necessarily hosting any replicas. This isn’t a permanent solution, but
> would help isolate the issue.
>
> First, let’s see if the not node is always the Overseer...
>
> Best,
> Erick
>
> > On Mar 4, 2019, at 6:51 AM, Gael Jourdan-Weil <
> gael.jourdan-w...@kelkoogroup.com> wrote:
> >
> > Hello Furkan,
> >
> > Yes the 3 servers have exact same configuration.
> >
> > Varnish load balancing is effectively round robin.
> > We monitor the number of requests per second, and we effectively see the
> 3 servers are receiving same amount of requests.
> >
> > Kind Regards,
> > Gaël
> >
> > 
> > De : Furkan KAMACI 
> > Envoyé : lundi 4 mars 2019 15:00
> > À : solr-user@lucene.apache.org
> > Objet : Re: SolrCloud one server with high load
> >
> > Hi Gaël,
> >
> > Does all three servers have same specifications? On the other hand, is
> your
> > load balancing configuration for Varnish is round-robin?
> >
> > Kind Regards,
> > Furkan KAMACI
> >
> > On Mon, Mar 4, 2019 at 3:18 PM Gael Jourdan-Weil <
> > gael.jourdan-w...@kelkoogroup.com> wrote:
> >
> >> Hello,
> >>
> >> I come again to the community for some ideas regarding a performance
> issue
> >> we are having.
> >>
> >> We have a SolrCloud cluster of 3 servers.
> >> Each server hosts 1 replica of 2 collections.
> >> There is no sharding, every server hosts the whole collection.
> >>
> >> Requests are evenly distributed by a Varnish system.
> >>
> >> During some peaks of requests, we see one server of the cluster having
> >> very high load while the two others are totally fine.
> >> The server experiencing this high load is always the same until we
> reboot
> >> it and the behavior moves to another server.
> >> The server experiencing the issue is not necessarily the leader.
> >> All servers receive the same number of requests per seconds.
> >>
> >> Load data:
> >> - Server1: 5% CPU when low QPS, 90% CPU when high QPS (this one having
> >> issues)
> >> - Server2: 5% CPU when low QPS, 25% CPU when high QPS
> >> - Server3: 5% CPU when low QPS, 20% CPU when high QPS
> >>
> >> What could explain this behavior in SolrCloud mechanisms?
> >>
> >> Thank you for reading,
> >>
> >> Gaël Jourdan-Weil
> >>
>
>

Re: MongoDb vs Solr

[Muwonge Ronald]

Hi Solr can use mongodb for storage and you can play with the data as it
grows depending on your data goals.Ease of learning doesn't mean
happiness.I recommend you use both for serious projects that won't collapse
soon.
Ronny
On 5 Aug 2017 02:16, "Francesco Viscomi"  wrote:

> Hi all,
> why i have to choose solr if mongoDb is easier to learn and to use?
> Both are NoSql database, is there a good reason to chose solr and not
> mongoDb?
>
> thanks really much
>
> --
> Ing. Viscomi Francesco
>

Re: [External] Re: Query all fields

[Muwonge Ronald]

On Thu, Oct 25, 2012 at 1:34 AM, Greene, Daniel [USA]
greene_dan...@bah.com wrote:
 Another option you'll find out there is to use a 'copy field ' to copy the 
 contents of multiple fields into a single indexed field for universal  
 searching...

Told with precision


 - Reply message -
 From: Ahmet Arslan iori...@yahoo.com
 To: solr-user@lucene.apache.org solr-user@lucene.apache.org
 Subject: [External] Re: Query all fields
 Date: Wed, Oct 24, 2012 6:26 pm




 Looking at the Solr tutorial I see
 queries like:

 q=videofl=name,id (return only name and id fields)

 Does that query all fields for the word video?

 No query is executed on default search field. If you add debugQuery=on to 
 your URL you can see which field is queried.

 Is there something specific setup in the solr tutorial that
 allows you
 to query across all fields?

 With http://wiki.apache.org/solr/ExtendedDisMax you can do that. You just 
 need to supply names of fields that you want to search.

 defType=edismaxqf=description,title,name,etc.

Re: Best and quickest Solr Search Front end

[Muwonge Ronald]

Yes this was the person I wanted to befriend Eric good to hear from
you.I won't hide anything am working a search engine for particular
content.I crawled some data  with nutch and indexed to solr.I have
been in search of a good solution and when reading the
Apache_Solr_3_Enterprise_Search_Server i fell in love with Blacklight
(nice name) I wend ahead and here iam.

http://waatu.com:3001

These will be the fields I need, URL,content,Title  something like
fields used by google,bing etc.What would yo advise tried to follow
this page 
https://github.com/projectblacklight/blacklight/wiki/How-to-configure-Blacklight-to-talk-to-your-(pre-existing)-Solr-index
but failed to get results form my solr index ;-(
.
By the way I like it's use at those universities and will introduce it
at the University I work soon thanks for job
https://hydra.hull.ac.uk/
IF all goes well wait for my donation ;-)
Regards
Ronny

On Mon, Oct 22, 2012 at 5:55 PM, Erik Hatcher erik.hatc...@gmail.com wrote:
 Further on that in recent versions of Solr, it's /browse, not the sillier 
 /itas handler name.

 As far as the best search front end, it's such an opinionated answer here.  
 It all really depends on what technologies you'd like to deploy.  The library 
 world has created two nice front-ends that are more or less general purpose 
 enough to use for other (non-library) schemas, with a bit of configuration.  
 There's Blacklight (Ruby on Rails) and VuFind (PHP).  As the initial creator 
 of Blacklight, I'll toss in my vote for that one as the best :)  But again, 
 it depends on many factors what's the Right choice for your environment.

 You can learn more about Blacklight at http://projectblacklight.org/, and see 
 many examples of it deployed in production here: 
 https://github.com/projectblacklight/blacklight/wiki/Examples

 Erik


 On Oct 22, 2012, at 08:13 , Paul Libbrecht wrote:

 My experience for the easiest query is solr/itas (aka velocity solr).

 paul


 Le 22 oct. 2012 à 11:15, Muwonge Ronald a écrit :

 Hi all,
 have done some crawls for certain urls with nutch and indexed them  to
 solr.I kindly request for assistance in getting the best search
 interface but have no choice.Could you please assist me on this with
 examples and guide lines looked at solr-php-client but failed.
 Thnx
 Ronny

Re: Best and quickest Solr Search Front end

[Muwonge Ronald]

On Tue, Oct 23, 2012 at 4:49 PM, Erik Hatcher erik.hatc...@gmail.com wrote:
 Ronny -

 Your best bets will be to engage the Blacklight team at their mailing list or 
 in the #blacklight IRC room, both of which are active every day.
Thanks will do that

 The links in your search UI will need to be adjusted, as Rails doesn't like 
 having the URL formatted id's as part of the path - this is something I've 
 ended up customizing when I've demo'd Blacklight with a non-library data set 
 that had URLs for id's (but I don't recall how I customized it exactly, but 
 basically overrode how the document URLs are formed to put the id in a query 
 string parameter).

 You did get results though!   Press search :)
Now when I did press search I get something but why don't I get a
single result when I search for something :-).FUNNY hahah I can afford
a smile at least

 You're just not showing any initial facets, but that's a config option.

 What University do you work for?   I don't know whether you meant to imply 
 Hull below or not, but Hull is using Blacklight within their Hydra project 
 among others.

Well am in Africa Uganda International University of East Africa
 Erik


 On Oct 23, 2012, at 08:46 , Muwonge Ronald wrote:

 Yes this was the person I wanted to befriend Eric good to hear from
 you.I won't hide anything am working a search engine for particular
 content.I crawled some data  with nutch and indexed to solr.I have
 been in search of a good solution and when reading the
 Apache_Solr_3_Enterprise_Search_Server i fell in love with Blacklight
 (nice name) I wend ahead and here iam.

 http://waatu.com:3001

 These will be the fields I need, URL,content,Title  something like
 fields used by google,bing etc.What would yo advise tried to follow
 this page 
 https://github.com/projectblacklight/blacklight/wiki/How-to-configure-Blacklight-to-talk-to-your-(pre-existing)-Solr-index
 but failed to get results form my solr index ;-(
 .
 By the way I like it's use at those universities and will introduce it
 at the University I work soon thanks for job
 https://hydra.hull.ac.uk/
 IF all goes well wait for my donation ;-)
 Regards
 Ronny

 On Mon, Oct 22, 2012 at 5:55 PM, Erik Hatcher erik.hatc...@gmail.com wrote:
 Further on that in recent versions of Solr, it's /browse, not the 
 sillier /itas handler name.

 As far as the best search front end, it's such an opinionated answer 
 here.  It all really depends on what technologies you'd like to deploy.  
 The library world has created two nice front-ends that are more or less 
 general purpose enough to use for other (non-library) schemas, with a bit 
 of configuration.  There's Blacklight (Ruby on Rails) and VuFind (PHP).  As 
 the initial creator of Blacklight, I'll toss in my vote for that one as the 
 best :)  But again, it depends on many factors what's the Right choice for 
 your environment.

 You can learn more about Blacklight at http://projectblacklight.org/, and 
 see many examples of it deployed in production here: 
 https://github.com/projectblacklight/blacklight/wiki/Examples

Erik


 On Oct 22, 2012, at 08:13 , Paul Libbrecht wrote:

 My experience for the easiest query is solr/itas (aka velocity solr).

 paul


 Le 22 oct. 2012 à 11:15, Muwonge Ronald a écrit :

 Hi all,
 have done some crawls for certain urls with nutch and indexed them  to
 solr.I kindly request for assistance in getting the best search
 interface but have no choice.Could you please assist me on this with
 examples and guide lines looked at solr-php-client but failed.
 Thnx
 Ronny

Re: Best and quickest Solr Search Front end

[Muwonge Ronald]

Thanks let me try it


On Mon, Oct 22, 2012 at 3:13 PM, Paul Libbrecht p...@hoplahup.net wrote:
 My experience for the easiest query is solr/itas (aka velocity solr).

 paul


 Le 22 oct. 2012 à 11:15, Muwonge Ronald a écrit :

 Hi all,
 have done some crawls for certain urls with nutch and indexed them  to
 solr.I kindly request for assistance in getting the best search
 interface but have no choice.Could you please assist me on this with
 examples and guide lines looked at solr-php-client but failed.
 Thnx
 Ronny