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Questions tagged [latency]

Latency is the time period between a signal being sent and a signal being received

Latency is the time period between a signal being sent and a signal being received. In computer networking this can be the time between a sending of a packet and receiving of a packet.

To illustrate we can use the ping command:

PING google.be (173.194.66.94) 56(84) bytes of data.
64 bytes from google.be (173.194.66.94): icmp_req=1 ttl=47 time=76.6 ms
64 bytes from google.be (173.194.66.94): icmp_req=2 ttl=47 time=74.8 ms
64 bytes from google.be (173.194.66.94): icmp_req=3 ttl=47 time=79.6 ms

The latency here is 76.6 ms.

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Benchmark of provisionning delays of various cloud providers

Cloud computing supposedly lets you instantiate on-demand processing power through additional VMs. The allocation process is frequently advertised as fast without further details. My personal experience is that VM instantiations on various cloud…
Joannes Vermorel
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How to find AWS EC2 with lowest latency to another server

I have a client sever located in AWS and I want to reduce latency between his machine and my EC2 instance. I rented two same servers in one availability zone and started sending requests to client`s API. It turned out that these servers have…
Alex Rozhnov
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Which one is faster, USA based AWS Servers vs local servers in Malaysia?

I have been tasked to create a local university database for a Malaysian Client. The client is requesting us to use Amazon Web Services as they bought into the marketing hype. I told them that AWS' closest servers are in Singapore, and it is…
user1034912
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How can I easily (e.g. as easy as rsync or SCP) do a high speed (1gpbs) file upload over an Internet-latency link?

I recently asked a similar question about how to transfer large (many gigabyte to many tens of gigaytes) files over the Internet when latency is high. I got a great answer, but only for downloads. When I want to upload something, from my computer…
john01dav
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Minimising latency: AWS and a third-party datacentre

I have a VPS (an EC2 instance) running on AWS-Ireland. I would like to minimise the latency of traffic between this instance and a service provider that has their servers at a third-party data centres (in this case - LD4). AWS provides a…
amrk
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Can someone help interpreting high latency / low throughput on a ESXi host (Direct-attached storage)

as a disclaimer - I am not a storage guy, so ELI5 ;) I am looking at a ESXi with direct-attached storage (SAS SSDs and HDDs in a RAID1, different datastores). System X shown on the graphics is on the HDD RAID, the other one (System Z) on the…
MMF
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Approximate speed-up from TLS 1.2 to TLS 1.3

We're using AWS API Gateway in a single region, which users from all over the world interact with. We've not yet had a chance to do multi-region deployments so some users experience a lot of latency as they're far from the AWS region. I've seen that…
pir
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Measure packet latency / drop between ingress and egress interface of a rate-limiting pass-through host

Somewhere between my sender and receiver, there is host explicitly limiting my transfer rate. I know it's a Linux host. The ingress interface for my traffic is eth0 and the egress interface is eth1. The rate limiter is most probably realized somehow…
rikinet
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How can I measure network latency of an Win32 application?

I have a Win32 application that connects to a server (whose IP is known) on specific ports. Is there a way to constantly monitor the latency (in milliseconds) of the packets send and received, and have an indication of how how many packets have been…
Emanuele Ciriachi
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Should traceroute be used to diagnose network latency issues?

I ran the traceroute command from Server A to Server B, two of the hops display a latency between 250ms to 480ms. However when running ping from Server A to Server B, the response is always within 1ms. My network admin team is of the opinion that…
Oliver
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Why the latency increases on highload?

We have a system built on AWS. We use Beanstalk, we have autoscaling, our database (mysql) is hosted on RDS. We use apache and php. We wanted to test our system on highload. So, we chose large instances for backend (4 CPUs, 15Gb of RAM - 20…
Volodymyr
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extreme ping latency in WDS network

I have setup a wireless network at work office with the following config: 192.168.1.1: TP-Link 941 Router, Root AP, connected to internet 192.168.1.2: TP-Link 901 AP, WDS Repeater, connected to 192.168.1.1 192.168.1.3: TP-Link 901 AP, WDS Repeater,…
Mohammad Javahery
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Dedicating a server for latency test

I've created a server to test bandwidth from employees working remote (using speedtest.net mini), but was wondering if anyone knew of a way to setup some software in linux to test latency and possibly keep track of the results. I essentially want to…
LB3
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How to compare RDP latency?

For a remote Windows desktop solution, accessed from Las Palmas de Gran Canaria, I want to evaluate various options. What currently comes into my mind: EC2, Ireland Azure Virtual Machine, Ireland Azure Virtual Machine, Amsterdam How do I best…
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Latency, Ping and Other Questions

In a high traffic application, like an online auction system, few ms could determine 'to win or 'to lose' the 'battle'. I'm from Brazil. Here, I 'ping' local sites - like UOL - and receive replies in ~ 11ms. When I 'ping' US sites - like RackSpace …
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