master-slave

Rails: How to split write/read query across master/slave database

橙三吉。 提交于 2019-11-28 12:15:31
My website has a very heavy read traffic. A lot heavier than write traffic. To improve the performance of my website I have thought of going with master/slave database configuration. The octupus gem seems to provide what I want, but since my app is huge I can't go though a millions of source code line to change the query distribution(sending read query to slave server and write query to master server). MySQL Proxy seems to be a great way to resolve this issue but since it is in alpha version I don't want to use it. So my question is what is the best way to split read/write queries across

How to login into DC-OS slave through Master

这一生的挚爱 提交于 2019-11-28 11:33:13
问题 I created DC-OS cluster on azure, after creating with ssh public key I can access to master with the following commands, sudo ssh -v -A -p 2200 user@master-ip -i /root/.ssh/id_rsa After getting into Master I want to access agents so I copied id_rsa and id_rsa.pub key from host to master node. and run the following command. ssh -p 22 10.32.0.4 debug1: No more authentication methods to try. Permission denied (public key) but unfortunately it will give following error, I have tried so many ways

How to code PHP MySQL class for master and slave setup?

非 Y 不嫁゛ 提交于 2019-11-27 07:28:57
问题 I have never used a master/slave setup for my mysql databases so please forgive if I make no sense here. I am curious, let's say I want to have a master DB and 3 slave DB's. Would I need to write my database classes to connect and add/update/delete entries to the master DB or is this automated somehow? Also for my SELECT queries, would I need to code it to randomly select a random DB server? 回答1: What you want to use (and research) is MySQL Replication. This is handled completely independent