On 09/05/08 14:42, Narayan Venkat wrote: > I understand that if you want to use ZIL, then the requirement is one or more > ZILs per pool.
A little clarification of ZFS terms may help here. The term ZIL is somewhat overloaded. I think what you mean here is a separate log device (slog), because intent logs are always present in ZFS. Without a slog, the logs are present in the "main pool". There is one log per file system and it allocates blocks in the main pool to form a chain. When a slog is defined, then it can be made up of multiple devices (in which case the writes are striped across the devices) or it can be in the form on a N way mirror - to provide redundancy. > With an SSD you can partition the disk to allow usage of a single disk for > multiple ZILs > Can we do the same thing with an PCIe-based NVRAM card > (like http://www.vmetro.com/category4304.html)? I don't think there's a Solaris supported driver for that device. However, any Solaris device, whether a partition or not, will work with ZFS provided it's at least 64MB. It's performance is another matter. > > Thanks > Narayan _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
