Joe, On Thu, Jul 02, 2009 at 04:50:34PM -0700, Joseph Mocker wrote: > Hello, > > I was wondering if someone could point me to any information describing > how the l2arc works? > > I attached an SSD as a cache device to the root pool of a 2009.11 > system. Although the cache has started filling up (zpool iostat -v) it > just seems that when I do a reboot, I hear quite a bit of disk activity. > I was hoping, in the best case, that most of the disk access that was > needed to boot would have been served though the SSD. > > Does the cache fill only on writes? And what is the cache replacement > policy if/when the cache becomes full?
That I think is a know issue and is being worked on (bug# 6662467). For a general description about how L2ARC works refer to Brendan's blogs at : - http://blogs.sun.com/brendan/entry/test - http://blogs.sun.com/brendan/entry/l2arc_screenshots Thanks and regards, Sanjeev > > I did notice some information regarding how limiting the speed at which > the l2arc populates, and I think bug 6748030 discusses a "turbo warmup". > > Thanks for any information. > > --joe -- ---------------- Sanjeev Bagewadi Solaris RPE Bangalore, India _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
