On Wed, Sep 18, 2013 at 8:51 AM, Roberto Spadim <roberto@xxxxxxxxxxxxx> wrote: > Sorry guys, this time i don't have a full knowledge about the > workload, but from what he told me, he want fast writes with hdd but i > could check if small ssd devices could help > After install linux with raid1 i will install apache mariadb and php > at this machine, in other words it's a database and web server load, > but i don't know what size of app and database will run yet > > Btw, ssd with bcache or dm cache could help hdd (this must be > enterprise level) writes, right? > Any idea what the best method to test what kernel drive could give > superior performace? I'm thinking about install the bcache, and after > make a backup and install dm cache and check what's better, any other > idea? We still need to know what size datasets are going to be used. And also given it's a webserver, how big of a pipe does he have? Given a typical webserver in a colo w/ 10Mbps pipe, I think the suggested config is overkill. For a webserver the 7200 SATA's should be able to deliver enough data to keep apache happy. In the database side, depends on how intensive the workload is. I see a lot of webservers where the 7200's are just fine because the I/O demands from the database are low. Blog/CMS systems like wordpress will be harder on the database but again it depends on how heavy the access is to the server. How many visitors/hour does he expect to serve? -- Drew -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
