Hello all, For smaller systems such as laptops or low-end servers, which can house 1-2 disks, would it make sense to dedicate a 2-4Gb slice to the ZIL for the data pool, separate from rpool? Example layout (single-disk or mirrored):
s0 - 16Gb - rpool s1 - 4Gb - data-zil s3 - *Gb - data pool The idea would be to decrease fragmentation (committed writes to data pool would be more coalesced) and to keep the ZIL at faster tracks of the HDD drive. I'm actually more interested in the former: would the dedicated ZIL decrease fragmentation of the pool? Likewise, for larger pools (such as my 6-disk raidz2) can fragmentation and/or performance benefit from some dedicated ZIL slices (i.e. s0 = 1-2Gb ZIL per 2Tb disk, with 3 mirrored ZIL sets overall)? Can several ZIL (mirrors) be concatenated for a single data pool, or only one dedicated ZIL vdev can be used? Thanks, //Jim Klimov _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
