bonaventura84

joined 10 months ago
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High storage latency on ESXi host in c/[email protected]
[–] [email protected] 1 points 9 months ago

I don’t have db VM, I think you are referring to deb which is short for Debian.

High storage latency on ESXi host in c/[email protected]
[–] [email protected] 1 points 10 months ago (2 children)

GID VMNAME NVDISK CMDS/s READS/s WRITES/s MBREAD/s MBWRTN/s LAT/rd LAT/wr

12953 dns - 1 0.00 0.00 0.00 0.00 0.00 0.000 0.000

16904 fw - 2 5.84 0.00 5.84 0.00 0.02 0.000 18.408

20481 vcsa - 13 16.58 0.00 16.58 0.00 0.08 0.000 37.582

130847 - 2 0.00 0.00 0.00 0.00 0.00 0.000 0.000

626694 deb - 2 12.06 0.00 12.06 0.00 0.46 0.000 6.586

as you can see the is no much IOPS per VM, like vcsa VM latency I captured is floating between 20 and 100ms, while deb has similar IOPS but lower latency

High storage latency on ESXi host in c/[email protected]
[–] [email protected] 1 points 10 months ago

That is the thing, my total IOPS are less than 150, with 4 disks in RAID 10 I believe I should get 300IOPS due to mirroring. If you look at the graph, red line is transfer in kbps and blue latency, why is it dropping when disk is highly utilised? I will post htop when I’m back from work.

1
High storage latency on ESXi host (alien.top)
 

I've been going back and forth with this issue for some time but honestly I have no idea if the vCenter telemetry is something to rely on. I'm experiencing rather high latency on the storage on my VMs, most of them idle, only vCenter and virtual firewall generate some IOPS, 5 are shut down, other 3 VMs are linux machines that idle for 99%, even though they can spike 100ms per IO. Today I have decided to migrate a VM storage to another server to find that higher disk utilization reduces the latency on the host, how that makes any sense? I'm using P420 in RAID 10 with 4x4TB 7k SAS HDDs.

Host latency:

https://preview.redd.it/cqvmy550ty1c1.png?width=986&format=png&auto=webp&s=f5823391eb6cd82cb9612b44aa2768087bf619e1

Affordable L2/L3 switch with POE and at least 2x10G uplinks in c/[email protected]
[–] [email protected] 1 points 10 months ago

30W should be enough, I have AP and couple of cameras, each consuming not more that few watts

1
Affordable L2/L3 switch with POE and at least 2x10G uplinks (alien.top)
 

As per the subject, can anyone recommend something affordable? I found 24 port Catalyst 3650 but they go not cheaper than £200.

Latency (+Internet Quality) Measuring in c/[email protected]
[–] [email protected] 1 points 10 months ago (1 children)

I’m not sure if Ubiquity provides this level of telemetry, is there a reason why would you need to run it few time a day? In any case, you can always run WinMTR from your host.

Slow speeds to servers on WAN in c/[email protected]
[–] [email protected] 1 points 10 months ago

Are your firewalls virtual/ hardware? What traffic goes where, what is site b, where is it? Where is proxy? Draw a diagram.

Updating firmware on HP ML110 G6 in c/[email protected]
[–] [email protected] 1 points 10 months ago

ILo updates were usually distributed in .bin files but that was in newer versions. Check vendor support site, it may be OS dependent https://support.hpe.com/connect/s/product?language=en_US&cep=on&kmpmoid=3984625&tab=driversAndSoftware