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Does Redis persist data?
...snapshooting and AOF writes update to an apappend-only log file similar to MySql.
You can use one of them or both.When Redis reboots,it constructes data from reading the RDB file or AOF file.
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Java Programming - Where should SQL statements be stored? [closed]
...ise, and then only used the least common denominator in order to switch to Mysql any minute. As any good DBA will tell you, there are subtle differences between the different big name databases, especially with regard to locking models and how they achieve consistency.
So, don't make a decision on ...
Differences between “BEGIN RSA PRIVATE KEY” and “BEGIN PRIVATE KEY”
...hm options and ENGINE provided algorithms can be used.. But some software (mysql) can use only PKCS#1 keys. Converting from PKCS#8 to PKCS#1 can be done with openssl rsa -in key.pem -out key.pem. Converting the other way can be done with openssl pkey -in key.pem -out key.pem.
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When to use pip requirements file versus install_requires in setup.py?
...cies that you recommend. For example you might use SQLAlchemy but suggest MySQL, and so put MySQLdb in the requirements file).
So, in summary: install_requires is to keep people away from things that you know don't work, while requirements files to lead people towards things you know do work. One...
How to change the name of a Django app?
...E <oldAppName>_modelName RENAME TO <newAppName>_modelName. For mysql too I think it is the same (as mentioned by @null_radix)
(For Django >= 1.7) Update the django_migrations table to avoid having your previous migrations re-run: UPDATE django_migrations SET app='<NewAppName>' W...
Database cluster and load balancing
...nnected along with the SQL node to achieve this(talking specifically about MySQL).
Now about the differences: load balancing is just one result that could be achieved through clustering, the others include high availability, scalability and fault tolerance.
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What can you use Python generator functions for?
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Real World Example
Let's say you have 100 million domains in your MySQL table, and you would like to update Alexa rank for each domain.
First thing you need is to select your domain names from the database.
Let's say your table name is domains and column name is domain.
If you use SELECT...
How to print a query string with parameter values when using Hibernate
...ase.url=jdbc:log4jdbc:hsqldb:mem:db_name #Hsql
#database.url=jdbc:log4jdbc:mysql://localhost:3306/db_name
My logback.xml configuration file looks like the below: this outputs all SQL statements with parameters plus the resultset tables for all queries.
<?xml version="1.0" encoding="UTF-8"?>...
SQL Server SELECT into existing table
...etting an "undeclared variable" error. Though maybe this issue is only for MySQL. The CREATE TABLE ... LIKE .. worked;
– LazerSharks
Jul 7 '13 at 22:35
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Threads vs Processes in Linux
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If a process forks with an open mysql connection, bad things happen, as the socket is shared between two processes. Even if only one process uses the connection, the other stops it from being closed.
– MarkR
Nov 2 '12 ...