Sorry, forget to forward to the list ...
---------- Forwarded message ---------- From: Fábio Rabelo <fa...@fabiorabelo.wiki.br> Date: 2015-04-06 10:51 GMT-03:00 Subject: Re: [OmniOS-discuss] All SSD pool advice To: Chris Nagele <nag...@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 ... Fábio Rabelo 2015-04-06 10:41 GMT-03:00 Chris Nagele <nag...@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 <d...@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 > > > > > > > > _______________________________________________ > > OmniOS-discuss mailing list > > OmniOS-discuss@lists.omniti.com > > http://lists.omniti.com/mailman/listinfo/omnios-discuss > > > > > > > > _______________________________________________ > > OmniOS-discuss mailing list > > OmniOS-discuss@lists.omniti.com > > http://lists.omniti.com/mailman/listinfo/omnios-discuss > > > _______________________________________________ > OmniOS-discuss mailing list > OmniOS-discuss@lists.omniti.com > http://lists.omniti.com/mailman/listinfo/omnios-discuss >
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