Re: BBU still needed with SSD?

Andy wrote:
>
>
> --- On Mon, 7/18/11, David Rees <drees76(at)gmail(dot)com> wrote:
>
> > >> In this case is BBU still needed? If I put 2 SSD
> > in software RAID 1, would
> > >> that be any slower than 2 SSD in HW RAID 1 with
> > BBU? What are the pros and
> > >> cons?
> >
> > What will perform better will vary greatly depending on the
> > exact
> > SSDs, rotating disks, RAID BBU controller and
> > application.? But
> > certainly a couple of Intel 320s in RAID1 seem to be an
> > inexpensive
> > way of getting very good performance while maintaining
> > reliability.
>
> I'm not comparing SSD in SW RAID with rotating disks in HW RAID with
> BBU though. I'm just comparing SSDs with or without BBU. I'm going to
> get a couple of Intel 320s, just want to know if BBU makes sense for
> them.

Yes, it certainly does, even if you have a RAID BBU.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

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