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Questions tagged [redundancy]

Redundancy is the duplication of critical components or functions of a system with the intention of increasing reliability of the system, usually in the case of a backup or fail-safe.

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SQL Select Unique Rows

Example1: IDENT | CURRENT | SOURCE 12345 | 12345 | A 23456 | 12345 | B 34567 | 12345 | C Example2: IDENT | CURRENT | SOURCE 56789 | 56789 | A Table with 3 columns, IDENT, CURRENT and SOURCE. I'm trying to write a query that will only…
ID10T
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Lot of redundancy in passenger table

I am working on a project related to ticket booking. I can store passenger data i.e. Name,Age,Sex along with Ticket ID in passenger table. But the problem is if another ticket is booked for same passenger I will have to re-enter the same passenger…
Amit Kumar
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Java Nested For Loop redundancy

I did an exercise in one of my books to get this output. We are supposed to use nested loops and basic java. I could not format the output in here but the code below produces the correct output. I got it to print the correct output but I feel like…
user2780240
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How to delete redundant records with different dates from a MySQL table

I have a table in a MySQL database that consists of the following columns: itemID bigint(11) itemDate datetime attributeID smallint(6) value int(9) Edit: This table stores attributes for items uniquely defined in a separate table…
Florin Mircea
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Storing elements into an ArrayList but getting redundancies?

I edited the question: I'm trying to store foreign keys of all tables of a database in an arraylist Fkeys. I have the method getFK that retrieves foreign keys (if they exist) of existing tables public ArrayList Fkeys = new ArrayList(); public…
dzwowt
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How can I implement solr redundancy on the haystack side?

I've configured solr+zookeeper and now I want to set up redundancy in haystack. I mean that if haystack cannot connect to master server he should choose slave ... settings.py: HAYSTACK_CONNECTIONS = { 'master': { 'ENGINE':…
user1119698
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MySQL .What approach should be used ,normalisation or decreasing the number of tables

Suppose I have to do a networked application for an organisation ,say bank .Here a member can have different accounts like loan accounts,GDCS accounts,deposit accounts etc.To store the data I thought about two apporoaches.I am taking the deposit…
Jinu Joseph Daniel
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Handling Multiple OnClick Events with One Method

I created a web form with the following controls:          Notice that there are 12 buttons, all of which fundamentally do the same thing. Is it possible to have one method (not twelve) that handles their OnClick event?
wjmolina
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Failover: For Software error or Hardware or Both?

I Am designing a system where I will have programs running in Nominal/Redundant mode, One on one machine, one on another machine. Should the Nominal program fail (Failover event), the Redundant should take over and assume operations as a new Nominal…
NWS
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redundancy server for Apache /server failure/overload

i want to create this scenario (or other recommended solution) I want to have 3 running instances on amazon EC2 (3 different servers) database (MySQL) my web application (uses instance 1 as its db) mirror application of 2 (also uses instance 1 as…
lior r
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Database advice for counting wins/losses between players

What is the best way to keep track of the scores between all the players from a database ? How many times a player won/lost against another. I thought about a duel table where I would have 3 colums: duel_id, winner_id and loser_id but I believe…
halpsb
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Multiple activity instances run?

I have 2 activities. In my first, i have a button and when i click on it, it start the second activity . But when i go back to my first and i click for second time my button, my second activity start but i have to go back two time to go back in…
Jean-Claude YALAP
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C++ Classes dependent on each other causing a cyclic dependency error

My searches have lead me to believe that the problem I am experiencing is called cyclic redundancy. I don't understand any of the solutions that are posted. I am (fairly) new to C++, coming from a strong Java background. Basically there are two…
user2218509
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combine two SPs in SQL Server

I am having two Stored Procedures of redundant code. The SPs will differ based on the table from which it is selected. I would like to combine those two SPs. Please help out. The main SP is: CREATE PROCEDURE [dbo].[spGetEmployeesBySearchString] …
prabu R
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What sort of indexing method can I use to store the distances between X^2 vectors in an array without redundancy?

I'm working on a demo that requires a lot of vector math, and in profiling, I've found that it spends the most time finding the distances between given vectors. Right now, it loops through an array of X^2 vectors, and finds the distance between each…
jakogut
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