similar to: JBOD / ZFS / Flash backed

Based on your message, it sounds like your total usable capacity requirement is around <1TB. With a modern SSD, you'll get something like 40k theoretical IOPs for 4k I/O size. You don't mention budget. What is your budget? You mention "4MB operations", where is that requirement coming from? On Wed, Apr 4, 2018 at 12:41 PM, Vincent Royer <vincent at epicenergy.ca>

Your question is difficult to parse. Typically RAID and JBOD are mutually exclusive. By "flash-backed", do you mean a battery backup unit (BBU) on your RAID controller? On Mon, Apr 9, 2018 at 8:49 AM, Vincent Royer <vincent at epicenergy.ca> wrote: > >> Is a flash-backed Raid required for JBOD, and should it be 1gb, 2, or 4gb >> flash? >> > > Is anyone

On 09/04/18 19:02, Vincent Royer wrote: > Thanks, > > I suppose what I'm trying to gain is some clarity on what choice is > best for a given application.? How do I know if it's better for me to > use a raid card or not, to include flash-cache on it or not, to use > ZFS or not, when combined with a small number of SSDs in Replica 3. > > How few is "small

> > > Is a flash-backed Raid required for JBOD, and should it be 1gb, 2, or 4gb > flash? > Is anyone able to clarify this requirement for me? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.gluster.org/pipermail/gluster-users/attachments/20180409/0b7677ce/attachment.html>

On 09/04/18 16:49, Vincent Royer wrote: > > > Is a flash-backed Raid required for JBOD, and should it be 1gb, 2, > or 4gb flash? > > RAID and JBOD are completely different things. JBODs are just that, bunches of disks, and they don't have any cache above them in hardware. If you're going to use ZFS under Gluster, look at the ZFS docs first. Short answer is no.

Yes the flash-backed RAID cards use a super-capacitor to backup the flash cache. You have a choice of flash module sizes to include on the card. The card supports RAID modes as well as JBOD. I do not know if Gluster can make use of battery-backed flash-based Cache when the disks are presented by the RAID card in JBOD. The Hardware vendor asked "Do you know if Gluster makes use of

Thanks, The 3 servers are new Lenovo units with redundant PS backed by two huge UPS units (on for each bank of power supplies). I think the chances of losing two nodes is incredibly slim, and in that case a Disaster Recovery from offsite backups would be reasonable. My requirements are about 2TB, highly available (so that I can reboot one of the 3 servers without taking down services). Beyond

Thanks, I suppose what I'm trying to gain is some clarity on what choice is best for a given application. How do I know if it's better for me to use a raid card or not, to include flash-cache on it or not, to use ZFS or not, when combined with a small number of SSDs in Replica 3. On Mon, Apr 9, 2018 at 10:49 AM, Alex Crow <acrow at integrafin.co.uk> wrote: > On 09/04/18

It worries me how many threads talk about low performance. I'm about to build out a replica 3 setup and run Ovirt with a bunch of Windows VMs. Are the issues Tony is experiencing "normal" for Gluster? Does anyone here have a system with windows VMs and have good performance? *Vincent Royer* *778-825-1057* <http://www.epicenergy.ca/> *SUSTAINABLE MOBILE ENERGY SOLUTIONS*

On 01/05/2018 02:27, Thing wrote: > Hi, > > So is the KVM or Vmware as the host(s)?? I basically have the same setup > ie 3 x 1TB "raid1" nodes and VMs, but 1gb networking.? I do notice with > vmware using NFS disk was pretty slow (40% of a single disk) but this > was over 1gb networking which was clearly saturating.? Hence I am moving > to KVM to use glusterfs

Tony?s performance sounds significantly sub par from my experience. I did some testing with gluster 3.12 and Ovirt 3.9, on my running production cluster when I enabled the glfsapi, even my pre numbers are significantly better than what Tony is reporting: ??????????????????? Before using gfapi: ]# dd if=/dev/urandom of=test.file bs=1M count=1024 1024+0 records in 1024+0 records out 1073741824

I have some questions about the choice of SSDs to use for ZIL and L2ARC. I''m trying to build an OpenSolaris iSCSI SAN out of a whitebox system, which is intended to be used as a backup SAN during storage migration, so it''s built on a tight budget. The system currently has 4GB RAM, 3GHz Core2-Quad and 8x 500GB WD REII SATA HDDs attached to an Areca 8port ARC-1220 controller

I''m not sure if this is the right place for the question or not, but I''ll throw it out there anyways. Does anyone know, if you create your pool(s) with a system running fishworks, can that pool later be imported by a standard solaris system? IE: If for some reason the head running fishworks were to go away, could I attach the JBOD/disks to a system running snv/mainline

Hi, Does anyone have experiences about ARC-1883I SAS controller with CentOS7? I am planning to have RAID1 setup and I am wondering if I should use the controller's RAID functionality which has 2GB cache or should I go with JBOD + Linux software RAID? The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034 7200rpm SAS/12Gbit 128 MB If hardware RAID is preferred, the

Anyone have any experience with a R510 with the PERC H200/H700 controller with ZFS? My perception is that Dell doesn''t play well with OpenSolaris. Thanks, Geoff

I don't think this is off topic since I want to use JBOD mode so that Linux can do the RAID. I'm going to hopefully run this in CentOS 5 and Ubuntu 12.04 on a Sunfire x2250 Hard to get answers I can trust out of vendors :-) I have a Sun RAID card which I am pretty sure is LSI OEM. It is a 3G/s SAS1 with 2 external connectors like the one on the right here :

Hi, my oi151 based home NAS is approaching a frightening "drive space" level. Right now the data volume is a 4*1TB Raid-Z1, 3 1/2" local disks individually connected to an 8 port LSI 6Gbit controller. So I can either exchange the disks one by one with autoexpand, use 2-4 TB disks and be happy. This was my original approach. However I am totally unclear about the 512b vs 4Kb issue.

Hi. I''m managing a HDS storage system which is slightly larger than 100 TB and we have used approx. 3/4. We use vxfs. The storage system is attached to a solaris 9 on sparc via a fiberswitch. The storage is shared via nfs to our webservers. If I was to replace vxfs with zfs I could utilize raidz(2) instead of the built-in hardware raid-controller. Are there any jbod-only storage

Hey Guys, I have some questions?regarding?a new home server I am going to build in the hopefully very near future (ASAP, I just need to finish planning everything and this is the penultimate?hurdle), I will be creating a software RAID... Lets say I have three drives "knocking" around which are all 1TB SATA II drives but each made by a different manufacturer. I am going to guess that

apparently if you don''t order a J4200 with drives, you just get filler sleds that won''t accept a hard drive. (had to look at a parts breakdown on sunsolve to figure this out -- the docs should simply make this clear.) it looks like the sled that will accept a drive is part #570-1182. anyone know how i could order 12 of these?