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AMD Radeon RAMDisk – Software solution – Get faster performance than SSDs with existing RAM

        We all know about computer storage devices namely volatile and nonvolatile storage. Non-volatile storage devices stores the data even during the device is powered off and on the other hand volatile storage devices do not store the data when it is powered off. Hard disks or hard drives used in desktops and… Read More »

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Query Elasticsearch Cluster in Filter Section when using Logstash

     This article details about on how to query Elasticsearch from Logstash when processing logs or when using any other inputs. input { file { } #Any other inputs } filter { grok { pattern => "%{NUMBER:attribute1} %{GREEDYDATA:attribute2}" } elasticsearch { hosts => ["HOSTNAME:9200/index_name/type_name"] query => 'field_name.sub_field:%{attribute1}' fields => ["attribute3_elasticsearch", "attribute3_new","attribute4_elasticsearch", "attribute4_new"] #We can… Read More »

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Use TELNET in Shell Script or Non-interactive Mode

      TELNET  is used to connect to remote machines to send data or execute commands either using interactive or non-interactive. Interactive mode is quite common where two users connect each others machine to communicate information. However we can automate the TELNET connection using the following command. Note that the sleep command is essential… Read More »

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Linked List in C- Print Linked List in Reverse Order using Recursion

DATA STRUCTURES IN C – LINKED LIST (20 PROGRAMS) Try DATA STRUCTURES IN C – LINKED LIST (20 PROGRAMS) Linked List in C- Print Linked List in Reverse Order using Recursion : Source Code : #include<stdio.h> struct node *head=NULL; //Pointer to store the staring node of the linked list //Always stores the address location of first… Read More »

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Import Data from Mongo DB to Elasticsearch using Elasticsearch River

           Importing data from Mongo DB to Elasticsearch requires Mongo DB to have replica set enabled. Once the replica set is enabled, Mongo DB populates the oplog (operation log) as and when we add documents to the collection in the database (except database named local, which is used by Mongo DB to… Read More »

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