Apache Solr 7.5 create core, alter schema and query for API data

With reference to previous tutorial: Core A single Solr instance, which represents a single Solr index. A core has a different set of configuration files and schema definitions than other cores. Now lets create a new core, after downloading and installing the files, have a look at the readme file in solr-7.5.0 directory (my pc; […]

Solr Terminology: Cores, Collections & Nodes

https://doc.lucidworks.com/lucidworks-hdpsearch/2.5/Guide-Solr.html Solr is the popular open source search solution. Solr can index content from many sources and has integration points for Apache Tika to index rich text documents (Office documents, PDFs, etc.), JSON files, CSV files and Solr-specific XML. Cores, Collections and Clusters Generally speaking, if you use Solr in standalone mode, you have a […]

Apache Solr 7.5 Build book_store index backup / restore

https://lucene.apache.org/solr/guide/6_6/making-and-restoring-backups.html If you are worried about data loss, and of course you should be, you need a way to back up your Solr indexes so that you can recover quickly in case of catastrophic failure. Solr provides two approaches to backing up and restoring Solr cores or collections, depending on how you are running Solr. […]

OpenOPC Python

OpenOPC for Python http://openopc.sourceforge.net/ OpenOPC for Python is a free, open source OPC (OLE for Process Control) toolkit designed for use with the popular Python programming language. Because the OpenOPC library implements a minimal number of Python functions which may be chained together in a variety of ways, the library is simple to learn and […]

Apache Solr 7.5 Build book_store index insert/update/delete

We are starting from: Your Solr server is up and running, but it doesn’t contain any data yet, so we can’t do any queries, but we will use our own data and create our own index. in: https://lucene.apache.org/solr/guide/7_5/solr-tutorial.html#exercise-1   Quick recap: Start cloud mode: bin\solr.cmd start -e cloud We will create a collection called book_store […]

Reindexing in Solr

https://wiki.apache.org/solr/HowToReindex   The term “reindex” is not a special thing you can do with Solr. It literally means “index again.” You just have to restart Solr (or reload your core), possibly delete the existing index, and then repeat whatever actions you took to build your index in the first place. Indexing (and reindexing) is not […]

Apache Solr 7.5 (techproducts tutorial) 2

In this tutorial I have moved the environment outside the virtualbox. I installed the same version of Solr and JRE, and added the path for environment. And also created two bat files for easy start and stop of the server. I go over the steps in the tutorial below Index techproducts example data: https://lucene.apache.org/solr/guide/7_5/solr-tutorial.html#exercise-1 To […]

Zabbix 3.4 trigger functions with Python

So you have all your data, all is sent to Zabbix. What now…… Zabbix configuration for trigger: https://www.zabbix.com/documentation/3.4/manual/config/triggers Zabbix supported trigger functions: https://www.zabbix.com/documentation/3.4/manual/appendix/triggers/functions   Item type of information: Numeric (unsigned) – 64bit unsigned integer Numeric (float) – floating point number Negative values can be stored. Allowed range: -999999999999.9999 to 999999999999.9999. Starting with Zabbix 2.2, receiving […]