On 19 nov. 2010, at 15:04, Edward Ned Harvey wrote: >> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- >> boun...@opensolaris.org] On Behalf Of Günther >> >> <br> <br> Disabling the ZIL (Don't) <br> > > This is relative. There are indeed situations where it's acceptable to > disable ZIL. To make your choice, you need to understand a few things... > > #1 In the event of an ungraceful reboot, with your ZIL disabled, after > reboot, your filesystem will be in a valid state, which is not the latest > point of time before the crash. Your filesystem will be valid, but you will > lose up to 30 seconds of the latest writes leading up to the crash. > #2 Even if you have ZIL enabled, all of the above statements still apply to > async writes. The ZIL only provides nonvolatile storage for sync writes. > > Given these facts, it quickly becomes much less scary to disable the ZIL, > depending on what you use your server for.
Not to mention that in this particular scenario (local storage, local VM, loopback to ESXi) where the NFS server is only publishing to the local host, if the local host crashes, there are no other NFS clients involved that have local caches that will be out of sync with the storage. Cheers, Erik _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
