Disable read/write caching to disk?
Andre Guibert de Bruet
andy at siliconlandmark.com
Thu May 26 21:00:45 PDT 2005
On Thu, 26 May 2005, Scott Long wrote:
> Chad Leigh -- Shire.Net LLC wrote:
>> On May 26, 2005, at 8:49 PM, Eric Anderson wrote:
>>> So it sounds dangerous, but not disastrous.. Sounds like soft- updates
>>> would help this alot, so I'll turn them back on for this filesystem (I
>>> typically do use it).
>>>
>>> At a minimum, it would be awesome to even have a way to do one host rw
>>> and several doing ro. Think of the case of a web server farm, where it's
>>> nearly all reads.
>>
>> use NFS or something. Not ideal but it allows you to have lots of clients
>> using the same space without the disasters.
>
> NFS and Coda/AFS require that you have an intelligent node, i.e. a
> computer, in front of each disk. The whole idea of a Fibre Channel
> or iSCSI SAN is that you have a network of disks connected to a network
> of computers, all able to communicate with each other and not have to
> be fronted by a computer. This is quite important for high-availability
> storage networks that want the reliability and scalability of not having
> a single computer be the choke point or single-point-of-failure for a
> particular set of data. Granted it's still somewhat of a niche, but as
> persistent storage and data mining become more part of the mainstream,
> it'll start becoming very important. Right now FreeBSD simply isn't an
> option, while Solaris, NT, and Linux are.
Fair enough. So the question becomes: What are the Linux folks doing that
we aren't and how?
Andy
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