[OmniOS-discuss] Fwd: All SSD pool advice

[Chris Nagele]

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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