[ale] School Project to Create Distributed Filesystem

[Igor Kresnik]

you can with this
http://www.openafs.org/

Ed Cashin pravi:
> On Tue, Feb 24, 2009 at 11:57 AM, Greg Freemyer <greg.freemyer at gmail.com> wrote:
>   
>> Just thought of another approach.
>>
>> Layer one = iSCSI or NBD to export raw block devices out of each server.
>>
>> Layer two = mdraid to create a fault tolerant block device. ie. use
>> Raid 10 or Raid 6 etc. to integrate the raw devices into a whole.
>>
>> Layer three = LinuxHA to control the whole mess.
>>
>> Then you just throw in a filesystem and NFS support and you're done.
>> LinuxHA already has filesystem and nfs control scripts I think.
>>     
>
> There's a HOWTO that might be interesting to folks who are
> considering this architecture.  It's directed towards a specific
> platform, but it is short and generalizes well, since the platform
> is based on debian lenny.
>
>   http://support.coraid.com/support/cln/ft/failover-kit.html
>
> The use of md isn't covered, but it's been tested with the
> configuration in the HOWTO and works fine as long as the
> admin understands clearly that heartbeat must control md
> just like it controls filesystem mounting.  Specifically, the
> standby must never have md running with its own independent
> ideas about the state of the Software RAID.
>
>