@oksana said in How many IOPS your NVMe can do? All of them!:

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There’s a common opinion that the performance in general and IOPS-intensive performance like NVMf [NVMe over Fabrics] is usually lower in virtualized environments due to the hypervisor overhead.

Check out this article to prove or knock down this belief!

Great, now I'm impatient to see the results!

@oksana said in Accelerating your IT environment to new speeds with StarWind iSER:

@travisdh1 Yes, PFC for switch and RDMA support for Ethernet

So, yes, it does require a few things, but things that should be available already. Great!

This won't be an overnight fix. My first step though is complete. The Synology is now in RAID 10 with 1 hot spare disk. One thing to note; the disks in this Synology are WD reds :(. So even though the storage connects to the Hyper-V host via iSCSI, the VHDX stored on it, which contains the data for our file server is at least not living on a RAID 5 anymore.

Next will be dealing with the local storage situation on the Hyper-V host (the two-drive RAID 1 and the three-drive RAID 5). The only "production" VM storage left on the RAID 5 is our Spiceworks VM, which I'll move to the RAID 1 storage. The other VMs that have their VHDs on the RAID 5 are non-production / testing VMs, so if they're lost, it's not a big deal to just rebuild them.

@Danp said in XenServer 6.2 servers down. I have no Xen skill. Most likely networking? Help!:

@Dashrender said in XenServer 6.2 servers down. I have no Xen skill. Most likely networking? Help!:

The only cost here would be the drive. Clonezilla is free, the use of the PC is free (of course that user is not ideal, so I guess there is cost there 😉 )

The owner is currently out of the country... use his desktop! 😁

If AD works. Lol

@travisdh1 said in iSCSI port w/Windows iSCSI initiator dropping:

@art_of_shred said in iSCSI port w/Windows iSCSI initiator dropping:

Is Free-NAS ever a good idea? I've only ever heard nasty things said about it.

Only if you know nothing about building and managing storage is it going to serve a purpose. BSD or Solaris without the added bits would be the preferred route to use ZFS.

And if you don't know those bits, you should not be running a SAN.

@scottalanmiller said in XenServer Import Disk Failure:

But unlike ESXi that simply blocks things that they don't want you to do, XS just stops making it easy.

Well, if none of the stuff anyone tried to do works, maybe they SHOULD block it! 🙂

@thwr said in iscsi target Path configuration:

@scottalanmiller said in iscsi target Path configuration:

Last system I checked LVM and mapper were equal symlinks pointing to the same thing. I checked it because I was documenting on CentOS.

Still interesting. Device mapper is just that, a mapper pointing to LVM (and LUKS) devices for example. So your mapper and LVM are both pointing to something "physical" like md devices or sd*?

Both pointing to the dm device, which is another layer of mapping.

@ntoxicator said:

Unless there is another distributed file solution that can make work for their Mac / Apple eco-system.

If they happen to be using Gmail for their email you may want to look at AODocs. Amazon WorkDocs is another option.

@ntoxicator said:

Always complaining to me the slowness of mac's even though they're spec'd accordingly. Soon as you kill dropbox.. runs fine. had to implement alot of QoS on their network to throttle DB traffic.

Did you make any changes to the LAN Sync feature in Dropbox? I've always seen big improvements when blocking cloud sync services over WLAN within the office via endpoint software. e.g. Symantec

Sounds like a win.

@art_of_shred said:

What about block-level deduplication? I guess that doesn't apply to the Windows model.

The block level data is on a Drobo, so that is not an option in this case. If it were NetApp or something like that, it might be a different story.