`<div dir="ltr"><div>And no expander !!!! ;- )))<br><br></div><div>I use 3 IBM SAS1015 flashed to IT, the only quality SAS controller with afordable price that I can find here in Brasil .<br></div><div><br><br></div>Fábio Rabelo<br></div><div class="gmail_extra"><br><div class="gmail_quote">2015-04-07 11:38 GMT-03:00 Chris Nagele <span dir="ltr"><<a href="mailto:nagele@wildbit.com" target="_blank">nagele@wildbit.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">That helps a lot. That SC216BA-R1K28LPB chassis looks really nice,<br>
especially the two extra bays in the back for the rpool.<br>
<br>
Thanks everyone!<br>
<br>
Chris Nagele<br>
Co-founder, Wildbit<br>
Beanstalk, Postmark, <a href="http://dploy.io" target="_blank">dploy.io</a><br>
<br>
<br>
On Mon, Apr 6, 2015 at 10:04 AM, Schweiss, Chip <<a href="mailto:chip@innovates.com">chip@innovates.com</a>> wrote:<br>
><br>
> On Mon, Apr 6, 2015 at 8:53 AM, Fábio Rabelo <<a href="mailto:fabio@fabiorabelo.wiki.br">fabio@fabiorabelo.wiki.br</a>><br>
> wrote:<br>
>><br>
>> Sorry, forget to forward to the list ...<br>
>><br>
>><br>
>> ---------- Forwarded message ----------<br>
>> From: Fábio Rabelo <<a href="mailto:fabio@fabiorabelo.wiki.br">fabio@fabiorabelo.wiki.br</a>><br>
>> Date: 2015-04-06 10:51 GMT-03:00<br>
>> Subject: Re: [OmniOS-discuss] All SSD pool advice<br>
>> To: Chris Nagele <<a href="mailto:nagele@wildbit.com">nagele@wildbit.com</a>><br>
>><br>
>><br>
>> I never get my hands at that 4U model ...<br>
>><br>
>> I have 2 of this babys in a customer of mine :<br>
>><br>
>> <a href="http://www.supermicro.com/products/chassis/2U/216/SC216BA-R1K28LP.cfm" target="_blank">http://www.supermicro.com/products/chassis/2U/216/SC216BA-R1K28LP.cfm</a><br>
>><br>
>> Each one with 24 1TB Samsung 850PRO for a litle over an year,<br>
>> OminOS+Napp-it , no issue whatsoever ...<br>
>><br>
>> Expanded Chassis brings me lots and lots of headaches ...<br>
><br>
><br>
> The system I've built with interposers has SAS expanders and gives me no<br>
> problems. Samsung SSDs are the only SSD I've found that works well with the<br>
> interposer.<br>
><br>
> -Chip<br>
>><br>
>><br>
>><br>
>> Fábio Rabelo<br>
>><br>
>> 2015-04-06 10:41 GMT-03:00 Chris Nagele <<a href="mailto:nagele@wildbit.com">nagele@wildbit.com</a>>:<br>
>><br>
>>> Thanks everyone. Regarding the expanders, our 4U servers are on the<br>
>>> following chassis:<br>
>>><br>
>>> <a href="http://www.supermicro.com/products/chassis/4U/846/SC846E16-R1200.cfm" target="_blank">http://www.supermicro.com/products/chassis/4U/846/SC846E16-R1200.cfm</a><br>
>>><br>
>>> We are using all SAS disks, except for the SSDs. How big is the risk<br>
>>> here when it comes to SAS -> SATA conversion? Our newer servers have<br>
>>> direct connections on each lane to the disk.<br>
>>><br>
>>> Chris<br>
>>><br>
>>> Chris Nagele<br>
>>> Co-founder, Wildbit<br>
>>> Beanstalk, Postmark, <a href="http://dploy.io" target="_blank">dploy.io</a><br>
>>><br>
>>><br>
>>> On Sat, Apr 4, 2015 at 7:18 PM, Doug Hughes <<a href="mailto:doug@will.to">doug@will.to</a>> wrote:<br>
>>> ><br>
>>> > We have a couple of machines with all SSD pool (~6-10 Samsung 850 pro<br>
>>> > is the<br>
>>> > current favorite). They work great for IOPS. Here's my take.<br>
>>> > 1) you don't need a dedicated zil. Just let the zpool intersperse it<br>
>>> > amongst<br>
>>> > the existing zpool devices. They are plenty fast enough.<br>
>>> > 2) you don't need an L2arc for the same reason. a smaller number of<br>
>>> > dedicated devices would likely cause more of a bottleneck than serving<br>
>>> > off<br>
>>> > the existing pool devices (unless you were to put it on one of those<br>
>>> > giant<br>
>>> > RDRAM things or similar, but that adds a lot of expense)<br>
>>> ><br>
>>> ><br>
>>> ><br>
>>> ><br>
>>> ><br>
>>> > On 4/4/2015 3:07 PM, Chris Nagele wrote:<br>
>>> ><br>
>>> > We've been running a few 4U Supermicro servers using ZeusRAM for zil<br>
>>> > and<br>
>>> > SSDs for L2. The main disks are regular 1TB SAS.<br>
>>> ><br>
>>> > I'm considering moving to all SSD since the pricing has dropped so<br>
>>> > much.<br>
>>> > What things should I know or do when moving to all SSD pools? I'm<br>
>>> > assuming I<br>
>>> > don't need L2 and that I should keep the ZeusRAM. Should I only use<br>
>>> > certain<br>
>>> > types of SSDs?<br>
>>> ><br>
>>> > Thanks,<br>
>>> > Chris<br>
>>> ><br>
>>> ><br>
>>> > --<br>
>>> ><br>
>>> > Chris Nagele<br>
>>> > Co-founder, Wildbit<br>
>>> > Beanstalk, Postmark, <a href="http://dploy.io" target="_blank">dploy.io</a><br>
>>> ><br>
>>> ><br>
>>> ><br>
>>> > _______________________________________________<br>
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>><br>
>><br>
>><br>
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</blockquote></div><br></div>
`