Hi there,
We're having real issues with user logins at peak times within our View environment (08:30 to 09:30 in the morning) and it often takes up to 30 minutes for a single user to login. Outside of peak times it's absolutely fine 1-2 minutes tops.
My first instinct was a storage issue, either with the VDI desktops or the Roaming Profile server (also virtualised), but we're not seeing any storage latency within vSphere or our NetApp monitoring. We've got a trial version of vRealize Operations Manager with the Horizon View integration installed and this hasn't highlighted anything of interest.
I'm really struggling to get to the bottom of this. Clearly something is bottlenecked somewhere within our environment, but I haven't yet worked out where.
I've checked for storage latency, the fibre links between chassis to the switches to the storage, vNIC on the Roaming Profile server, host CPU & memory contention, Active Directory authentication doesn't show any issues and standard desktop users are OK.
Has anyone experienced anything similar and what steps did you take to pinpoint the issue?
As a background, we're running the following:
- 12 x ESXi 5.5 hosts (2 x Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz - 128GB RAM) - These hosts are HP blade servers and we're using the HP Gigabit switches in the back of the chassis, so inter-host connectivity is 1Gbps.
- 800 x Windows 7 based Linked Clone desktops (1 x vCPU - 1GB RAM)
- NetApp Storage (1 x FAS2040, 1 x FAS2240, an aggregate on each controller loaded to around 220 desktops per aggregate) using FC connectivity.
If I've missed any key information that someone might need to dig further or offer advice please let me know, I'm desperate to get this resolved and will be more than happy to provide further detail.
We're looking at taking an eval of a NetApp All Flash unit with 10Gbps connectivity and utilising NFS. I'm just worried that we'll implement this and the same bottleneck will exist elsewhere within our environment and we'll still be in the same situation.
I look forward to your thoughts!
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EDIT:
I posted this thread a few weeks back, which touched on the issue. At the time I made the switch over to Persona Management for profile management instead of Roaming Profiles to see if this made a difference, it actually made it worse.
View 5.3 - Persona Management - High Writes on Profile Server
As I said, Chrome in our profiles is making some of them fairly large 100-300MB, but having spoken to other people this isn't particularly huge. My initial thoughts around these large profiles, but I'm now thinking the bottleneck lies elsewhere, possibly network.