Well the internet link here is 100mbps, i think the workload will be a
bit more than only 100 users, it's a second webserver+database server
He is trying to use a cheaper server with more disk performace, Brazil
costs are too high to allow a full ssd system or 15k rpm sas harddisks
For mariadb server i'm studing if the thread-pool scheduler will be
used instead of one thread per connection but "it's not my problem"
the final user will select what is better for database scheduler
In other words i think the work load will not be a simple web server
cms/blog, i don't know yet how it will work, it's a black/gray box to
me, today he have sata enterprise hdd 7200rpm at servers (dell server
r420 if i'm not wrong) and is studing if a ssd could help, that's my
'job' (hobby) in this task

2013/9/18 Drew [off-list ref]:

On Wed, Sep 18, 2013 at 8:51 AM, Roberto Spadim [off-list ref] wrote:

quoted

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?


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Drew
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Roberto Spadim