Re: [ovirt-users] NAS for oVirt
On 12/23/2016 04:45 PM, rightkicktech.gmail.com wrote: Hi Mikhail, Thank you for your suggestion. Have you had any performance issues with freenas? It has been mentioned on some blogs that freenas might have performance issues. Not sure why. A clean Centos with NFS sounds ok also. What do you do if you need snapshots of data? Lvm snapshots? So... if you have VERY limited network, that is 1Gbit, for example, you'll find that to be one of the biggest bottlenecks performance wise for a NAS. Assuming you have good 10Gbit, the bottleneck likely switches to storage. For spinning rust, number of spindles can help. Generally speaking, because this is NAS, you might not get much out of rotational speeds and seek times on those higher end drives. That is to say, you won't see huge differences between 7200 rpm and even 15K rpm. SSD is a different thing, obviously, it will perform the best and allow you to make the most of that 10Gbit (or more) connection to storage. Memory. On a NAS, memory is important. I wouldn't go for anything less than 32GB. The more you can cache the better. With regards to "sync" vs "async"... if you have an enterprise setup where power is reliable, going to "async" could really help on writes. If you need lots and lots of NAS storage NFS 4.1 (which could perform better in certain cases anyway) will allow you to offload some operations when you have a parallel NFS configuration. I'm running a NAS on CentOS with 10Gbit iSCSI attached SAN storage with lots of spindles in RAID6. Again, if you have "good" storage.. it's just storage and now you can focus on the NAS head itself. I run NFS 4.1 there and have 32G of ram. I run "async" since this in the datacenter, data is backed up and lots of power redundancy. You can increase write performance by 40-60% doing that (btw, this is what the "big boys" do to post the numbers the post). By using a CentOS based NAS, I get the flexibility of doing CIFS via Samba4 as an option... now this isn't oVirt, but for times when I need to expose storage to Windows hosts with full Windows permissions support. Underneath, again, since it's a home grown thing, I can use a broad mixture of storage configuration and fileystems. If you feel very uncomfortable with Linux (which would be odd if you chose oVirt).. then maybe go FreeNAS, but I'm saying you can do a whole lot better. But, I'm guessing possibly this is a low end network. In which case, again, that's going to be primary bottleneck performance wise. I'd go for space and price realizing that performance will never be all that awesome. With that said, there are lots of ultra-cheap home NAS units that say they are gigabit, but often can deliver no more than 300Mbit or so. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] NAS for oVirt
Den 23 dec. 2016 23:49 skrev "rightkicktech.gmail.com" : > > Hi Mikhail, > > Thank you for your suggestion. > Have you had any performance issues with freenas? It has been mentioned on > some blogs that freenas might have performance issues. Not sure why. I can't say for sure either since the statement is too unspecific. Like saying that "CentOS might have performance issues", it's too vague. Though what I'd guess is that since ZFS honors syncs over NFS, write performance is affected. Either you turn sync off (epic bad) or add a SSD that you use as log disk which makes the performance problem go away, plus mitigates a lot of the fragmentation that would otherwise build with time. Remember to configure the disks as RAID10, or striped mirrors in ZFS-speak, when using it for VM workload for maximum IOPS. We have been using a FreeBSD machine with ZFS serving NFS to our oVirt environment for more than five years without larger issues. Merry Christmas! /K > A clean Centos with NFS sounds ok also. What do you do if you need snapshots > of data? Lvm snapshots? > > Alex > > On December 23, 2016 5:08:42 PM EET, "Краснобаев Михаил" wrote: >> >> Hi, >> >> it mainly depends on the budget. I can give you some advice from my own >> experience: >> >> SMB systems from QNAP or any other vendor don't cope well with the load that >> OVirt generates (simultaneous access), because they are usually built on >> slow drives. >> Using 15K drives helps a bit. I have a Centos machine that is used only as a >> file storage (NFS, 4x15K drives in raid5). >> >> I would suggest trying to built a Freenas machine on NL-SAS drives + SSD >> cache. In my opinion it would the most cost efficient decision. >> >> Best regards, >> >> MIkhail >> >> 23.12.2016, 15:53, "rightkicktech.gmail.com" : >>> >>> Hi all, >>> >>> I am thinking to setup an environment with oVirt and centralized storage >>> using a NAS that supports NFS and iSCSI. >>> >>> The setup will be used to host approx 20 VMs. The VMs wi ll be running >>> critical services and not for testing. I have seen several from QNAP, >>> iXsystems (freenas mini), ... >>> What NAS would you recommend for this setup? >>> >>> Thanx, >>> Alex >>> -- >>> Sent from my Android device with K-9 Mail. Please excuse my brevity., >>> >>> ___ >>> Users mailing list >>> Users@ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/users >> >> >> >> -- >> С уважением, Краснобаев Михаил. >> >> > > > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] NAS for oVirt
Hi Mikhail, Thank you for your suggestion. Have you had any performance issues with freenas? It has been mentioned on some blogs that freenas might have performance issues. Not sure why. A clean Centos with NFS sounds ok also. What do you do if you need snapshots of data? Lvm snapshots? Alex On December 23, 2016 5:08:42 PM EET, "Краснобаев Михаил" wrote: >Hi, > > > >it mainly depends on the budget. I can give you some advice from my own >experience: > > > >SMB systems from QNAP or any other vendor don't cope well with the load >that OVirt generates (simultaneous access), because they are usually >built on slow drives. > >Using 15K drives helps a bit. I have a Centos machine that is used only >as a file storage (NFS, 4x15K drives in raid5). > > > >I would suggest trying to built a Freenas machine on NL-SAS drives + >SSD cache. In my opinion it would the most cost efficient decision. > > > >Best regards, > > > >MIkhail > > > >23.12.2016, 15:53, "rightkicktech.gmail.com" : > >Hi all, > >I am thinking to setup an environment with oVirt and centralized >storage using a NAS that supports NFS and iSCSI. > >The setup will be used to host approx 20 VMs. The VMs will be running >critical services and not for testing. I have seen several from QNAP, >iXsystems (freenas mini), ... >What NAS would you recommend for this setup? > >Thanx, >Alex >-- >Sent from my Android device with K-9 Mail. Please excuse my brevity., > >___ >Users mailing list >Users@ovirt.org >http://lists.ovirt.org/mailman/listinfo/users > > > > > >-- > >С уважением, Краснобаев Михаил. > > > > -- Sent from my Android device with K-9 Mail. Please excuse my brevity.___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] NAS for oVirt
Hi Andrea, The storage would be 6 TB. I will have a look on the options from Synology. Thank you. Alex On December 23, 2016 3:20:59 PM EET, Andrea Ghelardi wrote: >Hello Alex, >Specs you provided are a little bit vague. You don’t specify storage >space. >Our main storage here is a SAN Compellent, but we do have also Synology >and we are quite happy with it >You can start searching this or comparable product >https://www.synology.com/en-global/products/RS2416+ for your production > >Cheers >Andrea > > >From: users-boun...@ovirt.org [mailto:users-boun...@ovirt.org] On >Behalf Of rightkicktech.gmail.com >Sent: Friday, December 23, 2016 1:50 PM >To: users@ovirt.org >Subject: [ovirt-users] NAS for oVirt > >Hi all, > >I am thinking to setup an environment with oVirt and centralized >storage using a NAS that supports NFS and iSCSI. > >The setup will be used to host approx 20 VMs. The VMs will be running >critical services and not for testing. I have seen several from QNAP, >iXsystems (freenas mini), ... >What NAS would you recommend for this setup? > >Thanx, >Alex >-- >Sent from my Android device with K-9 Mail. Please excuse my brevity. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] NAS for oVirt
Hi, it mainly depends on the budget. I can give you some advice from my own experience: SMB systems from QNAP or any other vendor don't cope well with the load that OVirt generates (simultaneous access), because they are usually built on slow drives.Using 15K drives helps a bit. I have a Centos machine that is used only as a file storage (NFS, 4x15K drives in raid5). I would suggest trying to built a Freenas machine on NL-SAS drives + SSD cache. In my opinion it would the most cost efficient decision. Best regards, MIkhail 23.12.2016, 15:53, "rightkicktech.gmail.com" :Hi all,I am thinking to setup an environment with oVirt and centralized storage using a NAS that supports NFS and iSCSI.The setup will be used to host approx 20 VMs. The VMs will be running critical services and not for testing. I have seen several from QNAP, iXsystems (freenas mini), ...What NAS would you recommend for this setup?Thanx,Alex--Sent from my Android device with K-9 Mail. Please excuse my brevity.,___Users mailing listUsers@ovirt.orghttp://lists.ovirt.org/mailman/listinfo/users -- С уважением, Краснобаев Михаил. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] NAS for oVirt
I've got a similar setup, FC Compellent for primary storage and a Synology Rack NAS for testing. Synology with 4 bonded ports is plenty fast enough for my needs. On 23 December 2016 at 13:20, Andrea Ghelardi wrote: > Hello Alex, > > Specs you provided are a little bit vague. You don’t specify storage space. > > Our main storage here is a SAN Compellent, but we do have also Synology > and we are quite happy with it > > You can start searching this or comparable product > https://www.synology.com/en-global/products/RS2416+ for your production > > > > Cheers > > Andrea > > > > > > *From:* users-boun...@ovirt.org [mailto:users-boun...@ovirt.org] *On > Behalf Of *rightkicktech.gmail.com > *Sent:* Friday, December 23, 2016 1:50 PM > *To:* users@ovirt.org > *Subject:* [ovirt-users] NAS for oVirt > > > > Hi all, > > I am thinking to setup an environment with oVirt and centralized storage > using a NAS that supports NFS and iSCSI. > > The setup will be used to host approx 20 VMs. The VMs will be running > critical services and not for testing. I have seen several from QNAP, > iXsystems (freenas mini), ... > What NAS would you recommend for this setup? > > Thanx, > Alex > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. > > ___ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > > ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] NAS for oVirt
Hello Alex, Specs you provided are a little bit vague. You don’t specify storage space. Our main storage here is a SAN Compellent, but we do have also Synology and we are quite happy with it You can start searching this or comparable product https://www.synology.com/en-global/products/RS2416+ for your production Cheers Andrea From: users-boun...@ovirt.org [mailto:users-boun...@ovirt.org] On Behalf Of rightkicktech.gmail.com Sent: Friday, December 23, 2016 1:50 PM To: users@ovirt.org Subject: [ovirt-users] NAS for oVirt Hi all, I am thinking to setup an environment with oVirt and centralized storage using a NAS that supports NFS and iSCSI. The setup will be used to host approx 20 VMs. The VMs will be running critical services and not for testing. I have seen several from QNAP, iXsystems (freenas mini), ... What NAS would you recommend for this setup? Thanx, Alex -- Sent from my Android device with K-9 Mail. Please excuse my brevity. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
