[OpenIndiana-discuss] Backups and snapshots

[Dan Swartzendruber]

Magnus wrote:
> On 6/10/11 3:56 PM, Gabriele Bulfon wrote:
>> Thanx for the reply ;)
>> I read somewhere that NFS is much slower than having an iscsi device.
>> Somewherelse they said the contrary....
> I think a lot of it can do with the clients being used. But in my 
> experience here, zfs backed iscsi targets are on-par with NFS on read 
> performance, but lag badly on write performance. NFS clients perform 
> pretty well in both read & write operations.
>
> ESX seems to like its vmdk's on NFS more than iSCSI here.
Agreed.  I have seen ESXi get finicky if it thinks the iSCSI target is 
offline.  One gotcha: it depends if the iSCSI storage is a file or a 
zvol.  Performance of the former seemed to be about that of NFS - 
performance of the latter sucked (I was seeing about a 50% degradation...)