Can HDFS operate across multiple datacenters?

Does/can HDFS manage files across multiple geographically dispersed datacenters? What distributed file systems can be used for this purpose?

01 February 2018 3,963 2 View

WAN topologies with capacity information?

What WAN topologies are available with capacity information on all of their edges?

31 December 2017 8,652 4 View

Name some open source Software Defined NIC frameworks?

User space packet processing has been attracting more attention lately. Can you name some open source Software Defined NIC frameworks based on user space packet processing?

31 December 2017 5,270 3 View

Papers on Multicast Traffic Engineering over Wide Area Networks?

Could you link to papers that discuss Multicast Traffic Engineering for WAN (including inter-datacenter networks) with focus on reliable bulk transfers?

31 December 2017 6,139 3 View

What datacenter applications push multicast updates?

Across different applications that run on datacenters, can you name applications that push multicast updates to multiple servers? Please provide name of software package for specific applications.

09 October 2017 5,341 4 View

Intra and Inter-Datacenter Traffic Characteristics

Could you point me to any paper, blog, website or presentation that focuses on datacenter or inter-datacenter traffic characteristics (with flow size, duration, inter arrival distributions)? I...

07 August 2017 165 5 View

Flow level max-min fairness at (datacenters) switches?

There are many switches that allow class-based fair queuing to prevent starvation. I was wondering if there are switches that actually implement flow level fair sharing according to max-min...

05 June 2017 2,118 2 View

How is data replicated across datacenters?

Is content/data replication performed proactively (pushed by the source) or reactively (pulled by a receiver) across datacenters?

01 January 1970 6,144 0 View

Simulators for SDN with Group Tables support

What network simulators support SDN along with Group Tables? I would like to use the group table feature that allows packet replication and forwarding to multiple outgoing ports (for multicasting).

01 January 1970 9,217 6 View

Cost metrics for path selection (routing) over inter-datacenter WAN?

When a new flow arrives at the edge of a WAN, what cost metrics have been proposed for selection of a path? Please assume single path routing. Also, given different scheduling policies (e.g. Fair...

01 January 1970 6,670 5 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature)?

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature-based reflection)? Thank you for your time and for...

03 March 2021 2,870 3 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View