[ovirt-users] Best practice for iSCSI storage domains

[FERNANDO FREDIANI]

That's one of the reasons I prefer File storage (like NFS) than iSCSI or 
Fiberchannel. A lot more flexible and manageable.

In the past for VMFS5 I used to work with 4TB LUNs. Now a days something 
between 4TB and 8TB may be ok given the bigger size of VMs, depending on 
your enviroment of course. However one thing to take attention in this 
scenario is how the metadata update process and how that can impact 
performance on bigger LUNs.

Fernando


On 07/12/2017 08:51, Maor Lipchuk wrote:
> On Thu, Dec 7, 2017 at 9:10 AM, Richard Chan 
> <richard at treeboxsolutions.com <mailto:richard at treeboxsolutions.com>> 
> wrote:
>
>     What is the best practice for iSCSI storage domains:
>
>     Many small targets vs a few large targets?
>
>     Specific example: if you wanted a 8TB storage domain would you
>     prepare a single 8TB LUN or (for example) 8 x 1 TB LUNs.
>
>
> There could be many reasons to use each type.
> From the top of my head I think that configuration wise it will be 
> better to configure more than one lun.
> That can be helpful if you plan to use external LUN disks for example.
>
> Multiple targets might also come useful if you plan to configure iSCSI 
> multipath in the future, that way you can choose only part of the 
> targets to apply the MPIO on.
>
>
>
>
>
>     -- 
>     Richard Chan
>
>
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