> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Ragnar Sundblad > > But if you have an application, protocol and/or user that demands > or expects persistant storage, disabling ZIL of course could be fatal > in case of a crash. Examples are mail servers and NFS servers.
Basically, anything which writes to disk based on requests from something across a network. Because if your system goes down and comes back up, thinking itself is consistent, but there's one client thinking "A" and another client thinking "B" ... even though your server is consistent, the world isn't. Another great example would be if your server handles credit card transactions. If a user clicks "buy now" in a web interface, and the server contacts Visa or MasterCard, records the transaction, and then crashes before it records the transaction to its own disks ... Then the server would come up and have no recollection of that transaction. But the user, and Visa/Mastercard certainly would remember it. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
