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Hi, I’m new to shared file systems and horizontal cloud scaling. I have already played with auto-scaling on aws/ec2. In term of spawning a destroying and I can achieve that. I just want to some advice of how best implement syncing for web files, infrastructure, data, etc. I have pretty much decided to put the database side of things on a private instance. I'll worry about db clustering later I’m not to bothered about this not, because the software supports it. It seems logical to put the web folder / application layer on a shared file system, maybe some configuration too. What I'm really unsure about is how to ensure that the current system is up to date and the configuration tweaked for the physical specs. How do people typically approach this? I'm guessing it not always viable to have a shared file system for everything. Is the approach a disciplined one? Where say I have development instance for infrastructure changes. Then there is a deployment flow where production instances are somehow refreshed without downtime. Or is there some other approach? I notice on sites like yahoo, things are often noticeably unsynced, mostly on the data front, but also other things. This would be unacceptable in my case. I appreciate any help I can get regarding this. My typical load is from php-fpm/nginx processes, mysql bellow this. Should the memory cache also be separated, or as I think it is quite good for this to be divided up with the infrastructure to support each public instance individually? Paul |
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