On Wed, 2010-10-20 at 16:07 +1300, Kent Fredric wrote: > On 20 October 2010 10:01, Hadley Rich <[email protected]> wrote: > > A database server however, Ubuntu is fine for. In fact I look after a > > few of them, and don't have any issues. > > I based this criticism partially on evidence from a friend who > maintained LastFM's HA DB servers, and they used ubuntu for this task, > and they had many problems with this :/ > > Their opinion was more "Centos, debian, or gtfo! " =) > > That just makes no sense whatsoever. The products are basically repackaged from the vendor ( if that's the right word in this context ), and the kernels have minimal differences.
There are slight differences between the server and desktop kernels, and further customisation ( eg increasing the length of the timeslice to increase throughput with a slight increase in latency ) that will improve performance further - but only when you're after that elusive last 10% However, when I tune a database server, I don't give a stuff what version of linux / *BSD it's running on! It's all about management of resources, and they're pretty much hardware related - well, except for choice of installed components... a fully stocked GUI based setup has no place here! Just as an aside, *every* distribution I know of has a default setup that allocates c.16 meg of memory for a MySQL server. CentOS / Fedora don't even enable the query cache! Sure I'm a debian fanboy from way back, but they're getting out of date a bit quick, and their hardware support could be better. CentOS is great, as long as you don't want the latest bells and whistles - which you don't on a server. LTS Ubuntu is probably the best of the bunch, as it's the most current. For a server that is. HA Database design is hard - usually based on replication to readonly servers for performance data access, and round robin multi-mastering for the core servers - rather than hardware clustering in my experience. Either way, the tools are the same no matter what distribution you use. Although I wouldn't expect LastFM to be that busy a database really?? Just as a parting thought... Ubuntu is just debian repackaged. Steve -- Steve Holdoway BSc(Hons) MNZCS <[email protected]> http://www.greengecko.co.nz MSN: [email protected] Skype: sholdowa
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