Distributed file systems or the like.

[Eric Anderson]

Zane C.B. wrote:
> On Thu, 25 May 2006 13:57:37 -0500
> Eric Anderson <anderson at centtech.com> wrote:
> 
>> Zane C.B. wrote:
>>> On Thu, 25 May 2006 12:50:38 -0500
>>> Eric Anderson <anderson at centtech.com> wrote:
>>>
>>>> Zane C.B. wrote:
>>>>> I am looking for something that will allow my to have multiple
>>>>> servers each containing the same filesystem and it is kept up to
>>>>> date in real time. Any one have any opinions on AFS or have any
>>>>> other suggestions?
>>>> NFS?
>>> NFS is nice, but it does not help when it comes to keeping a
>>> duplicate set of files on a second file server that is kept up to
>>> date in real time.
>> You could look at TDFS (Ivan's trivially distributed file system,
>> based on fuse), or a ggated mirror (I've done some layout and
>> tinkering with this, but no high-load testing).
> 
> I am curious how is the ggated setup is working?
> 
> I see the problem being it will have to be fscked if one of the
> machines goes down, before the other can take it's place.

Thats correct, and there's no way around that really, unless you have 
softupdates enabled and mount it dangerously and do a background fsck 
(although some will warn of impending doom here).

There's a lot of ways to do this, but what you sound like you want is a 
shared block device, with a single reader/writer to that disk, with a 
'spare' machine ready to take over that reader/writer role at a moments 
notice.  Does that sound right?


Eric



-- 
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Eric Anderson        Sr. Systems Administrator        Centaur Technology
Anything that works is better than anything that doesn't.
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