On Wed, Oct 5, 2016 at 1:29 PM, Gandalf Corvotempesta <gandalf.corvotempesta@xxxxxxxxx> wrote:
Il 30 set 2016 1:46 PM, "Gandalf Corvotempesta" <gandalf.corvotempesta@gmail.
com > ha scritto:> I was thinking about creating one or more raidz2 to use as bricks, with 2 ssd. One small partition on these ssd would be used as a mirrored SLOG and the other 2 would be used as standalone arc cache. will this worth the use of SSD or would be totally useless with gluster?
>
> I don't know if use gluster hot tiering or let zfs manage everything
>No advice here?
I'm still looking for advice, i would like start the new cluster with the new year and i still have to choose and buy hardware
The mirrored slog will be useful. Depending on what you put on the pool l2arc may not get used much. I removed mine as it got such a low hit rate serving VM's.
I also re-did my bricks from raidz2 to using mirrored pairs. I felt that with 3 server redundancy the performance benefits from a more raid10 type layout would be more useful than raidz2 for the pool. I could see where some might want more security though in their data
I myself wouldn't experiment with tiering for my use case. .I haven't heard any positive feedback from anyone using tiering yet to want to be testing.
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