So I have read in the ZFS Wiki: # The minimum size of a log device is the same as the minimum size of device in pool, which is 64 Mbytes. The amount of in-play data that might be stored on a log device is relatively small. Log blocks are freed when the log transaction (system call) is committed. # The maximum size of a log device should be approximately 1/2 the size of physical memory because that is the maximum amount of potential in-play data that can be stored. For example, if a system has 16 Gbytes of physical memory, consider a maximum log device size of 8 Gbytes.
What is the downside of over-large log device? Let's say I have a 3310 with 10 older 72-gig 10K RPM drives and RAIDZ2 them. Then I throw an entire 72-gig 15K RPM drive in as slog. What is behind this maximum size recommendation? -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
