While trying some things earlier in figuring out how zpool iostat is supposed to be interpreted, I noticed that ZFS behaves kind of weird when writing data. Not to say that it's bad, just interesting. I wrote 160MB of zeroed data with dd. I had zpool iostat running with an one second interval.
dd actually finished before the disk activity started, so I suppose, ZFS does aggressive write caching. However following the iostats, ZFS wrote two seconds at I suppose full speed (roughly 35-40MB/s) and then continued 26.5 seconds at 3.2MB/s. Adding all the values up, I get to the 160MB. I found this interesting. Is this intended? What's the rationale behind this? Wouldn't this put huge data writes in jeopardy, if dragged out like this? Thanks. -mg This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
