[Discuss] A really interesting chain of functionality

[markw at mohawksoft.com (Mark Woodward)]

On 09/25/2011 11:40 AM, Cole Tuininga wrote:
> On 9/25/11 10:49 AM, Edward Ned Harvey wrote:
>> Personally, I do the same thing in ZFS using zvol's for improved performance
>> and reliability and ability to snapshot.  (LVM snapshot is a terrible
>> thing.)
> Could you elaborate?  As somebody who is only passingly familiar with
> this level of things, I'm curious to learn what makes LVM's snapshot so
> terrible.
>

The idea is this: You use LVM to manage your physical storage. You 
create a logical volume for each logical grouping on a server. You 
expose the logical volume the ietd system to create an iSCSI device 
which can then be used by another machine as a block device.