[OmniOS-discuss] Fwd: All SSD pool advice

[Fábio Rabelo]

And no expander !!!! ;- )))

I use 3 IBM SAS1015 flashed to IT, the only quality SAS controller with
afordable price that I can find here in Brasil .


Fábio Rabelo

2015-04-07 11:38 GMT-03:00 Chris Nagele <nagele at wildbit.com>:

> That helps a lot. That SC216BA-R1K28LPB chassis looks really nice,
> especially the two extra bays in the back for the rpool.
>
> Thanks everyone!
>
> Chris Nagele
> Co-founder, Wildbit
> Beanstalk, Postmark, dploy.io
>
>
> On Mon, Apr 6, 2015 at 10:04 AM, Schweiss, Chip <chip at innovates.com>
> wrote:
> >
> > On Mon, Apr 6, 2015 at 8:53 AM, Fábio Rabelo <fabio at fabiorabelo.wiki.br>
> > wrote:
> >>
> >> Sorry, forget to forward to the list ...
> >>
> >>
> >> ---------- Forwarded message ----------
> >> From: Fábio Rabelo <fabio at fabiorabelo.wiki.br>
> >> Date: 2015-04-06 10:51 GMT-03:00
> >> Subject: Re: [OmniOS-discuss] All SSD pool advice
> >> To: Chris Nagele <nagele at wildbit.com>
> >>
> >>
> >> I never get my hands at that 4U model ...
> >>
> >> I have 2 of this babys in a customer of mine :
> >>
> >> http://www.supermicro.com/products/chassis/2U/216/SC216BA-R1K28LP.cfm
> >>
> >> Each one with 24 1TB Samsung 850PRO for a litle over an year,
> >> OminOS+Napp-it , no issue whatsoever ...
> >>
> >> Expanded Chassis brings me lots and lots of headaches  ...
> >
> >
> > The system I've built with interposers has SAS expanders and gives me no
> > problems.  Samsung SSDs are the only SSD I've found that works well with
> the
> > interposer.
> >
> > -Chip
> >>
> >>
> >>
> >> Fábio Rabelo
> >>
> >> 2015-04-06 10:41 GMT-03:00 Chris Nagele <nagele at wildbit.com>:
> >>
> >>> Thanks everyone. Regarding the expanders, our 4U servers are on the
> >>> following chassis:
> >>>
> >>> http://www.supermicro.com/products/chassis/4U/846/SC846E16-R1200.cfm
> >>>
> >>> We are using all SAS disks, except for the SSDs. How big is the risk
> >>> here when it comes to SAS -> SATA conversion? Our newer servers have
> >>> direct connections on each lane to the disk.
> >>>
> >>> Chris
> >>>
> >>> Chris Nagele
> >>> Co-founder, Wildbit
> >>> Beanstalk, Postmark, dploy.io
> >>>
> >>>
> >>> On Sat, Apr 4, 2015 at 7:18 PM, Doug Hughes <doug at will.to> wrote:
> >>> >
> >>> > We have a couple of machines with all SSD pool (~6-10 Samsung 850 pro
> >>> > is the
> >>> > current favorite). They work great for IOPS. Here's my take.
> >>> > 1) you don't need a dedicated zil. Just let the zpool intersperse it
> >>> > amongst
> >>> > the existing zpool devices. They are plenty fast enough.
> >>> > 2) you don't need an L2arc for the same reason. a smaller number of
> >>> > dedicated devices would likely cause more of a bottleneck than
> serving
> >>> > off
> >>> > the existing pool devices (unless you were to put it on one of those
> >>> > giant
> >>> > RDRAM things or similar, but that adds a lot of expense)
> >>> >
> >>> >
> >>> >
> >>> >
> >>> >
> >>> > On 4/4/2015 3:07 PM, Chris Nagele wrote:
> >>> >
> >>> > We've been running a few 4U Supermicro servers using ZeusRAM for zil
> >>> > and
> >>> > SSDs for L2. The main disks are regular 1TB SAS.
> >>> >
> >>> > I'm considering moving to all SSD since the pricing has dropped so
> >>> > much.
> >>> > What things should I know or do when moving to all SSD pools? I'm
> >>> > assuming I
> >>> > don't need L2 and that I should keep the ZeusRAM. Should I only use
> >>> > certain
> >>> > types of SSDs?
> >>> >
> >>> > Thanks,
> >>> > Chris
> >>> >
> >>> >
> >>> > --
> >>> >
> >>> > Chris Nagele
> >>> > Co-founder, Wildbit
> >>> > Beanstalk, Postmark, dploy.io
> >>> >
> >>> >
> >>> >
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> >>> >
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> >>> >
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