elasticsearch | Malice 's Customized Elasticsearch | Continuous Deployment library
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kandi X-RAY | elasticsearch Summary
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Trending Discussions on elasticsearch
QUESTION
I have an ElasticSearch (6.8) index with min and max values for a measurement.
The user inputs a value and I need to find records where the value is between the min and max fields.
Example documents in ElasticSearch:
...ANSWER
Answered 2021-Jun-15 at 15:46You can use a combination of two range
queries, one for each field, like this:
QUESTION
I am trying to search for a particular string in two fields. Right I am able to get the desired result. Now I want to rank the result in such a way that if value found in one key, it should be given more priority. I tried doing the following way but got error.
...ANSWER
Answered 2021-Jun-15 at 13:46You can rank the search result by using "^" in with their names. In your case it would be something like this.
QUESTION
In ElasticSearch, what's the rough implementation for an AND-style boolean query where the fields are term
types? Does ElasticSearch run filter queries separately on each of the field, and then find their intersections?
For example, if I have something like
...ANSWER
Answered 2021-Jun-15 at 03:14That kind of queries are extremely fast. Moreover, you should use bool/filter
instead of bool/must
as that will leverage filter caches and reuse existing filters to run the subsequent queries even faster.
You should go through this article which explains all about how filter bitsets are working. The first article has been posted a few years ago, but the logic underneath is still pretty much the same in recent versions.
Also here is another article worth looking at.
QUESTION
I am using the ECK operator, to create an Elasticsearch
instance.
The instance uses a StorageClass
that has Retain
(instead of Delete
) as its reclaim policy.
Here are my PVC
s before deleting the Elasticsearch
instance
ANSWER
Answered 2021-Jun-14 at 15:38with the hope that due to the Retain policy, the new pods (i.e. their PVCs would bind to the existing PVs (and data wouldn't get lost)
It is explicitly written in the documentation that this is not what happens. the PVs are not available for another PVC after delete of a PVC.
the PersistentVolume still exists and the volume is considered "released". But it is not yet available for another claim because the previous claimant's data remains on the volume.
QUESTION
I try to search categories and products in Elasticsearch using Nested type.
I have data like this:
...ANSWER
Answered 2021-Jun-14 at 01:51You can use a boolean query to combine the nested and non-nested queries
QUESTION
I have a complicated Elasticsearch query like the following example. This query has two sub queries: a weighted bool query and a decay function. I am trying to understand how Elasticsearch aggregrates the scores from each sub queries. If I run the first sub query alone (the weighted bool query), my top score is 20. If I run the second sub query alone (the decay function), my score is 1. However, if I run both sub queries together, my top score is 15. Can someone explain this?
My second related question is how to weight the scores from the two sub queries?
...ANSWER
Answered 2021-Jun-13 at 15:43I found the answer myself by reading the elasticsearch document on the usage of function_score. function_score
has a parameter boost_mode
that specifies how query score and function score are combined. By default, boost_mode
is set to multiply
.
Besides the default multiply
method, we could also set boost_mode
to avg
, and add a parameter weight
to the above decay function exp
, then the combined score will be: ( the_bool_query_score + the_decay_function_score * weight ) / ( 1 + weight )
.
QUESTION
I want to be able to search elasticsearch for either an exact match, or a partial search.
my input could be either name: Foobar
and in my list of results, I should be able to see any names matching Foobar
. Although if I enter Fo*
I want to get back any names matching Fo
such as Foreman, Foobill etc.
At the moment, if I search my database I just get back all the results to do with name
regardless of what the string looks like.
My code:
...ANSWER
Answered 2021-Jun-13 at 11:21Your best option would be to use wildcard field new keyword data type introduced by Elasticsearch. For more information check official documentation of Elastic about wildcard field here.
QUESTION
I wanted to ask a question about Elasticsearch making 5 shards in each index by default. Well for some reason this is not the case for me. I was wondering whether it was an error on my side (even though I didn't make any changes to the custom template) or this is no longer a case (no longer 5 shards defaultly for each index)? I didn't find anything in documentation or in internet about it. I know I can change this by running:
...ANSWER
Answered 2021-Jun-12 at 10:10From the 7.x version, the default number of primary shard in each index is 1, as mentioned here in the documentation
Before the 7.x version, the default number of primary shared for each index were 5
You can refer to the breaking changes of the elasticsearch 7.0.0 version here
Index creation no longer defaults to five shards Previous versions of Elasticsearch defaulted to creating five shards per index. Starting with 7.0.0, the default is now one shard per index.
QUESTION
I want to use the elasticsearch Geo-polygon query (https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-geo-polygon-query.html) or Geo-shape query inside an ingest pipeline and I've been thinking how to do it - as there is no such processor as query processor
and the example for the geo polygon is with this type of query.
The reason for me trying to use this tool is to enrich documents which's country location is null
, by checking their lat
and lon
fields and determining which country the doc is from.
Is there anyway this could be done in an ingest pipeline? Or any other way to determine a position by lat and lon within geo shapes in a pipeline?
...ANSWER
Answered 2021-Jun-12 at 07:49Answer for enrichment of the data with geo-based policy: https://discuss.elastic.co/t/geo-polygon-query-inside-ingest-pipeline/274886/9
Also note that there is a feature suggestion pending in Elastic Github in order to exclude the geo-shape used for the enrichment, so there will be no need for a second pipeline to delete the field.
QUESTION
I have a docker-compose setup with containers logging into fluentd. To support different demo environments, I have events being output to multiple destinations (ElasticSearch, Splunk, Syslog, etc.)
I would like to maintain a single configuration file, but disable output plugins that are not needed. If I have 4 potential output destinations, I would have to maintain 10 different configuration files to support all the different possible combinations.
I know that plugins can use environment variables for configuration parameters, which would be ideal. However, I don't see that there is a common 'enabled' or 'disable' parameter in the underlying plugin architecture.
Is there any way to disable a plugin externally? Or will I have to dynamically build my configuration file from an external script?
...ANSWER
Answered 2021-Jun-12 at 05:20I ended up doing this with environment variables by specifying the plugin type externally:
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