How to get a sticky load balancer in Windows Azure #load #balancer #big #ip

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Windows Azure has a load balancer that you can use for free. It is used mostly to load balance port 80 (aka web traffic) across a group of identically configured web servers, although it can be used to load balance any TCP/UDP port. It is not a sticky load balancer.

Most load balancers in the corporate world have a setting called ‘sticky sessions.’ This feature will route a user back to the same web server over and over again. This is done with performance in mind. People think that if the same user goes to the same server, the application will run faster because their data is probably cached on that particular server.

I think this is a fallacy in most cases, and that sticky sessions in a load balancer is a bad smell hinting at some rotting architecture. When I see sticky sessions somewhere, it is usually because of one of the following is true:

To me this is a big crime in and of itself. You should not be using session state, and if you are, it must be kept to a minimum. Session state turns out to be a huge crutch that helps people get their heads around how the web is truly stateless. You will see this most often with people that don’t understand the web at a low level, and probably spent their early part of their careers architecting client/server applications. Or they are just lazy.

The second half to this first problem is that they aren’t sharing said evil session state across their servers. For crying out loud people! If you insist on having session state, please for the love of binary share that state amongst your servers.

This sharing is easy to do with the variety of providers available to you, most are ‘out of the box’. Sharing state means that ASP.NET will read/write the state to a central location, instead of the in-process on box memory. For example, you can share it in a SQL box, or in off box memory. You can share it in Azure storage, or even AppFabric. You can share it with a box. You can share it with a Fox. Ok, not a fox. All by easily changing a line of configuration in your application.

Avoid bloated session state, and share with your friends.

If you are sharing your state amongst the web server group, then you don’t need a sticky load balancer, since no matter which server the user goes to they can get their state.

2. They are trying to shoehorn a stateful application into the web

The web isn’t stateful. Embrace it and move on. Every time a browser makes a connection to a web server it’s starting from scratch. In a natural call (without any crutches) all the server has to go on is the user agent info (browser type, ip address, etc.) and the contents of the requested URL. That’s it.

Over the years, especially early on, our industry has adapted several crutches to help get us around this statelessness that bothers us so. All of them have lead to horror when over used, so a light touch goes a long way. Those are namely session state (see above) and cookies.

Cookies are in some ways the same as session state. They save state for the application between calls. But instead of the storing the state on the server, it is stored on the client. Many people wave this off. “Oh, it’s not state, just some bits of data.”

The Real Problem

The real problem with sticky sessions is that it leads to fragility in your web cluster/farm/group/collective. If user A is always going to Server x, and all of their evil state, and data is on that server, then you have introduced a single dependency on your user. All of our infrastructure efforts always lead us to high availability and reliability. This sticky load balancer throws it’s hat in our faces and says, with an outrageous accent, “I don’t think so!”

All of a sudden, all of our hard work in building our web farm is thrown out the window because of some lazy architecture decisions. Your group of super servers is reduced to a simple group of individual servers.

When that one server does go offline (and it will because failure happens, embrace it) you will lose all those users. They will lost their state, and data. They will hit that button on their screen, and when the browser round trips and refreshes (because if you’re doing this, you likely aren’t doing SPA) the browser will return an error. That person won’t get their star trek pizza cutter, will have a bad experience, and their day will spiral out of control. They will go home and likely kick their neighbors dog. All because you used a sticky load balancer. Note: please do not kick anyone’s dog.

A secondary issue is load leveling. A great use of a load balancer that many people aren’t aware of is sarcasm that it can level the load /sarcasm across several servers. In a sticky LB scenario, it is easy for server x to get really busy, while server n is lonely and sits idle and unused. This always leads to resentment on the part of the server doing all the work, so try to avoid this.

If you were running your load balancer in a normal way, your users and their requests would be flooding evenly (fairly so anyway) across all of those web servers you paid for, giving the user a great experience. A server could go down, and the users work would be picked up by any of the other servers on the next trip. Boom goes the dynamite.

Do you really hate state?

I didn’t mean for this post to turn into a hate piece on state (session or cookie). I will soon get to why I wrote this post, but I wanted to get off my chest how I have seen state be abused before. Like I mentioned above, I don’t think you are evil for using it. An experienced and critically thinking developer who knows when to break the rules is allowed to break the rules.

So, what does this have to do with Windows Azure?

Good question my good man! In Windows Azure, the load balance we started talking about is a non-sticky load balancer. Yes, if you start up the local simulator, and try some tests you won’t see that happening. If you start up a group of web roles in Cloud Services, and try hitting F5 really fast in IE you won’t see balancing either.

That’s because there is some intelligence in the balancer, and because you can’t cause enough traffic with your own keyboard. Nor my super awesome-backlit-mechanical-Cherry-MX-red-switch-keyboard-that-the-neighbors-can-hear-when-I-am-typing-keyboard.

But, some people NEED a sticky balancer. They just NEED it. Either they are migrating something that is built that way, and they just can’t make the investment to fix it yet, or… that’s the only reason I can come up with.

So, here is you escape hatch, IIS Application Request Routing. ARR adds a layer of load balancing in software at the server level, instead of lower down the network stack. This lets it use some intelligence as to what the software is doing.

The IIS ARR can be used on-premises, or in Windows Azure. Basically your front-end your application with servers running ARR. Officially, ARR is:

“IIS Application Request Routing (ARR) 2.5 enables Web server administrators, hosting providers, and Content Delivery Networks (CDNs) to increase Web application scalability and reliability through rule-based routing, client and host name affinity, load balancing of HTTP server requests, and distributed disk caching. With ARR, administrators can optimize resource utilization for application servers to reduce management costs for Web server farms and shared hosting environments.”

So, if you need sticky load balancing, or maybe some smarter session routing in your application, either on-premises, or in the cloud, check out ARR. You can read all about it at the IIS website.

ARR also has some great caching features included as well. ARR Cache would be a good alternative to AppFabric cache, if you don’t want to run that.

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Zeus load balancer #zeus #load #balancer

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iPhone / iPad mit mehreren Computern synchronisieren so geht s

Wie ihr sicherlich alle wisst, verheiraten sich das iPhone oder das iPad mit einem Computer und das Synchronisieren via iTunes kann folglich auch nur noch mit diesem Hauptcomputer vorgenommen werden. Dies empfand ich wie viele andere schon seit jeher als nervig und habe mich auf die Suche nach einer Lösung gemacht, um meine iDevices mit dem Desktop und auch mit dem Notebook synchronisieren zu können.

Hier findet ihr nun eine Anleitung um ein iPhone oder iPad mit mehreren Computern synchronisieren zu können:

Anleitung für Mac
Ganz wichtig: Zuerst solltet ihr euer iPhone bzw. iPad wie bisher mit iTunes synchronisieren, um im Fall der Fälle ein aktuelles Backup zu haben. Man weiß ja nie, ob beim ein oder anderen nicht doch etwas schief gehen kann und somit seid ihr in jedem Fall auf der sicheren Seite.

Danach müsst ihr auf dem Computer, mit dem bisher das Gerät synchronisiert wurde, in das Verzeichnis eurer iTunes Bibliothek wechseln (normalerweise in eurem Musik Ordner). In diesem befindet sich eine Datei namens iTunes Music Library.xml . Diese öffnet ihr mit einem beliebigen Texteditor und sucht darin nach der Library Persistent ID . Kopiert nun eure 16-stellige ID (siehe Bild) an einen sicheren Ort, oder schreibt sie auf einen Zettel auf.

Auf dem neuen Computer
Stellt zunächst sicher, dass iTunes beendet ist und wechselt dann ebenfalls in das Verzeichnis der iTunes Bibliothek. Legt nun ein Backup der Dateien iTunes Library.itl und iTunes Music Library.xml an. Danach befolgt ihr genau die selben Schritte wie zuvor: iTunes Music Library.xml im Texteditor öffnen, nach der ID suchen und diese kopieren bzw. abschreiben. Darauf ersetzt ihr die Library Persistent ID auf dem neuen Computer durch die von eurem Hauptrechner.

Nun geht es ans Eingemachte: Ihr benötigt einen Hex-Editor. Da meine letzte Hex-Editor Nutzung wohl 10-15 Jahre zurück liegt, musste ich auch erst danach suchen. Für den Mac könnt ihr HexEdit verwenden.

Ihr öffnet als nächstes die Datei iTunes Library.itl mit eben diesem Hex-Editor und sucht nach der Library Persistent ID. die an 2. Stelle auf eurem Zettel stehen sollte. Benutzt am besten die Suchen und Ersetzen -Funktion des Editors und beachtet, dass ihr einen Hex-Wert als Suchgrundlage ausgewählt habt. Auch in dieser Datei ersetzt ihr diese ID mit der von eurem Hauptcomputer .

Mit PhoneAble wird derzeit ein Programm entwickelt, das die einzelnen Schritte automatisch durchführt. Allerdings befindet sich PhoneAble für Mac OS noch in einer frühen Alpha-Version und daher empfehle ich euch die Schritte manuell durchzuarbeiten.

Anleitung für Windows
Der iTunes DB Cloner führt alle oben genannten Aktionen automatisch aus. Ihr müsst das Programm lediglich einmal auf eurem Hauptcomputer starten, per Read ID eure ID herausfinden und abschreiben/-speichern. Danach wechselt ihr zum anderen Computer, führt den iTunes DB Cloner erneut aus und ersetzt per Update ID die ID des zweiten Computers mit der zuvor abgespeicherten .

Das war s. Beide Computer sind nun mit der gleichen Library Persistent ID ausgestattet und das iPhone bzw. iPad meckern nicht mehr, dass sie an einem anderen Rechner angeschlossen wurden. Eigentlich ist die Anleitung hier zu Ende, nach einigen Testläufen ergaben sich bei mir allerdings ein paar Probleme. daher gibt es nachfolgend noch ein paar Tipps.

Weitere Vorgehensweise und Einschränkungen
Ab sofort könnt ihr also euer iPhone/iPad auch am anderen Computer, beispielsweise am Notebook, anschließen und synchronisieren. Vor dem ersten Sync empfehle ich euch die Einkäufe zu übertragen: Wählt dafür in iTunes euer angeschlossenes Gerät aus und wählt mit der rechten Maustaste Einkäufe übertragen aus. Dadurch werden alle per iTunes gekauften Songs und Apps von eurem Gerät in die neue iTunes Bibliothek kopiert .

Nun zu den Einschränkungen: Leider funktioniert die Synchronisation (zumindest bei mir) nicht ganz optimal. Wer Musik auf seinem iPhone/iPad hat, die nicht per iTunes gekauft wurde, kann diese nicht einfach über das Gerät auf den neuen Rechner übertragen. Bei einem Sync würden diese Songs vom iDevice gelöscht werden. Ebenso verhält es sich bei Bildern, was auch logisch erscheint: Diese Dateien sind keine iTunes Käufe und auf dem anderen Computer nicht vorhanden, also würden sie beim Sync auf dem Gerät gelöscht werden. Wer ausschließlich gekaufte Musik auf dem Gerät hat, sollte damit keine Probleme haben.

Abhilfe schafft das Umstellen in iTunes auf Musik und Videos manuell verwalten bzw. das Deaktivieren der automatischen Synchronisation von Musik/Podcasts/Fotos. Da ich auf meinem iPad weder Musik noch Podcasts gespeichert habe, reicht es z.B. aus lediglich das Synchronisieren der Fotos auf dem Notebook zu deaktivieren. Alles andere klappt einwandfrei und das iPad kann nun fröhlich zwischen Desktop und Notebook hin- und hergesynced werden.

Die Vorteile
Ihr könnt nun euer iPhone/iPad mit mehreren Computern synchronisieren. Ernsthaft, falls der Hauptrechner mal ausfällt, habt ihr somit immer noch einen Ersatz und könnt an die Apps und Musik auf eurem iPhone herankommen. Auch wer länger unterwegs ist und sein Gerät bisher immer mit dem Desktop-PC zuhause synchronisiert hat, wird sich freuen, dass er größere Updates oder ein neues iOS ab sofort auch über das Notebook einspielen kann. Auch eine fremde iTunes Installation lässt sich so auf die schnelle umwandeln .

Alternative
Als Alternative könnt ihr euch einen Account bei Dropbox erstellen. eure iTunes Bibliothek auf deren Server laden und auf verschiedenen Rechnern synchron halten. Unterschiedliche Computer greifen dadurch immer auf die selbe Bibliothek zu.

Ich hoffe dieser Workaround konnte euch etwas weiterhelfen. Der Dank hierfür geht an Andrew Grant. der die Sache mit der Library Persistent ID entdeckt hat.

Solltet ihr Fragen zur Anleitung oder Probleme haben, die hier nicht behandelt wurden ab damit in die Kommentare.


Categories: News Tags: Tags: , ,

Load balancer vendors #load #balancer #vendors

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WELCOME TO TRUTEQ

WORDS FROM OUR VALUED CUSTOMERS

Additionally, various external parties have integrated to our services via the USSD Gateway and all have commented on the high standards TruTeq upholds when delivering technology solutions that work well.

The company has consistently delivered on projects with a high degree of professionalism, expert understanding of our business needs and with results that have met our expectations in terms of time, cost and quality of product.

we are very pleased with the quality of service your company provides. We sincerely appreciate your responsiveness and timely completion on projects. We have always been able to rely on your flexibility and courteous service.

I am truly delighted with the performance of TruteqWireless to date. From the start the entire team has thrown their collective weight behind making this project a success. Their flexible approach and ‘can-do’ attitude has set them apart from other vendors I have dealt with (and currently deal with) in this space.

TruTeq Wireless are primarily responsible for this project meeting its product delivery timelines, despite the day to day hurdles that must be overcome in a project of this nature.

We are excited about the enhanced customer experience that will be achieved though these solutions provided by TruTeq Wireless.


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Application Delivery, Server Load Balancer, A10 Thunder ADC, A10 Networks, load balancer hardware.#Load #balancer #hardware

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LOAD BALANCING & APPLICATION DELIVERY

A10 Thunder® ADC (Application Delivery Controllers) are high-performance solutions to enable customer applications to be highly available, accelerated and secure.

FORM FACTORS

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Physical

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Virtual

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Bare Metal

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HYBRID

FEATURES BENEFITS

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ADVANCED SERVER

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GLOBAL SERVER

LOAD BALANCING (GSLB)

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APPLICATION DELIVERY

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SSL OFFLOAD

WITH PFS AND ECC

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APPLICATION ACCELERATION

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WEB AND DNS

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PER-APPLICATION ANALYTICS

Available in Q3 2017

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AXAPI® REST-BASED PROGRAMMABILITY

DEPLOYMENT SCENARIOS

Thunder ADC may be deployed at the core of an environment to deliver high-performance application delivery, load balancing and security.

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Thunder ADC may be deployed to optimize network efficiency and services via traffic-steering and service-chaining to multiple value-added services, such as video optimization. The solution includes carrier-grade networking (CGN) support for IPv4 address expansion and IPv6 migration.

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A10 Thunder ADC may be deployed in front of common applications used by internal users. The application delivery partitions (ADP) provide the ability to configure specific policies on a per-app basis — for both internal and external applications — and allow appliance consolidation.

Load balancer hardwareLoad balancer hardware

Thunder ADC may be deployed at the core of an environment to deliver high-performance application delivery, load balancing and security.

Load balancer hardwareLoad balancer hardware

Thunder ADC may be deployed to optimize network efficiency and services via traffic-steering and service-chaining to multiple value-added services, such as video optimization. The solution includes carrier-grade networking (CGN) support for IPv4 address expansion and IPv6 migration.

Load balancer hardwareLoad balancer hardware

A10 Thunder ADC may be deployed in front of common applications used by internal users. The application delivery partitions (ADP) provide the ability to configure specific policies on a per-app basis — for both internal and external applications — and allow appliance consolidation.

Load balancer hardwareLoad balancer hardware


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Intelligent WAN Management via UBM, Hybrid-WAN, WAN Optimization #xroads, #xroads #networks, #intelligent #wan, #iwan, #hybrid-wan,

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Testimonial

“Our main ISP went down for entire day last week and because we were running a second connection through XRoads our customers were still able to access critical business resources on our network. Your product worked great and saved us from being down.”

Sedona has been a valued customer since 2004. XRoads Networks is dedicated to delivering ROI for its customers.

Chad W.
IT Admin
Sedona Group
Testimonial

“The product does what it is supposed to do and we are very happy with our two devices. Certainly a very helpful staff and a great product make XRoads a great choice for our organization.”

JC has been a valued customer since 2008 and has multiple UBM appliances deployed within its network.

Chas B.
Director of Information Technology
Jonathan Club
Testimonial

“Your UBM appliances have given me insight in to how my network is being used and your support has been excellent! Whenever we need help with a configuration change, your team is there to provide same day assistance, that’s really appreciated.”

As an Internet Service Provider Bonzai demands 24/7 uptime for their end-users and has been a valued customer since 2005.

Greg B.
President
Bonzai Pipeline
Testimonial

“We switched from a competitive product and have been very happy with the change. The EdgeXOS appliances have worked well since installation and include a host of features not available in our old solution.”

AHAA replaced an existing MultiWAN solution with XRoads.

Jamie P.
Network Engineer
AHAA

Intelligent WAN Management

Utilize Hybrid SD-WAN
for Faster Remote Office Connectivity

Cloud Firewalls

Dynamic Bandwidth Management

Network
Visibility

XRoads’ News

2016-12-30: XRoads Networks annouces major SD-WAN customer wins in health care and hospitality

2016-11-15: XRoads Networks is a top SD-WAN vendor for TCG Partners

2016-10-30: XRoads Networks is a proud Gold Sponsor for Sandler Partners

2016-09-18: XRoads Networks annouces expanded agreement with national tech franchise

2016-08-04: XRoads Networks deploys brand name customers with ZeroOutages

2016-06-23: XRoads Networks signs contracts for several multi-hundred site deployments

2016-05-14: XRoads Networks releases case studies for new major accounts

2016-05-02: XRoads Networks rolls out latest ZOOM portal services

2016-03-26: XRoads Networks expands partnership with Sandler Partners and agent channel

2016-02-26: XRoads Networks creates separate management division for ZeroOutages

2016-01-10: XRoads Networks launches new agent program for ZeroOutages

2015-09-30: XRoads Networks wins patant lawsuit vs Fatpipe Networks

2015-07-08: XRoads Networks Discusses Outage Affecting United Airlines

2015-06-30: XRoads Networks Discusses Recent Internet Outage

2015-03-02: XRoads Networks Announces BGP Optimization Solutions

2015-01-28: XRoads Networks confirms XOS not susceptible to Ghost

2014-09-24: XRoads Networks launches international XOSv software platform

2014-09-10: ZeroOutages delivers comprehensive reliability services

2014-07-05: XRoads Networks announces BGP acceleration technology

2014-07-01: XRoads Networks granted latest patent on multi-session acceleration

2014-04-11: EdgeXOS platform is not susceptible to the HeartBleed Internet bug

2014-01-15: XRNS Web Acceleration for hospitality provider Jonathan Club


Barracuda Networks #load #balancer #ssl #offloading

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Barracuda Load Balancer ADC

Features – Administration

  • Role-Based Administration
  • Connection Logging
  • Enhanced Reporting
  • SNMP Monitoring
  • REST API
    • Features – Availability

    • Layer 4 Load Balancing
    • Direct Server Return
    • Layer 7 Load Balancing
    • High Availability Cluster
    • Global Server Load Balancing
    • VLAN
    • Link Bonding (LACP)
    • Features – Application Delivery

    • SSL Offloading
    • Content Routing
    • AD and Kerberos Integration
    • HTTP Compression
    • Content Caching
    • SSL Hardware Acceleration
    • Features – Application Security

    • Inbound Attack Prevention
    • Outbound Data Theft Protection
    • Protection Against DDoS Attacks
    Barracuda Load Balancer ADC

    640

    • 5 Gbps Maximum Throughput
    • 250 Real Servers Supported
    • 3.6 Gbps HTTP Throughput
    • 1.3 Gbps HTTPS (SSL) Throughput
    • 2 Gbps Max. Compression Throughput
    • 16,000,000 Layer 4 Concurrent TCP Connections
    • 165,000 Layer 4 TCP Connections per sec
    • 60,000 HTTP Connections per sec
    • 8,300 HTTPS (SSL) Terminations per sec (2K Keys)

    Hardware

    Features – Administration

  • Role-Based Administration
  • Connection Logging
  • Enhanced Reporting
  • SNMP Monitoring
  • REST API
    • Features – Availability

    • Layer 4 Load Balancing
    • Direct Server Return
    • Layer 7 Load Balancing
    • High Availability Cluster
    • Global Server Load Balancing
    • VLAN
    • Link Bonding (LACP)
    • Features – Application Delivery

    • SSL Offloading
    • Content Routing
    • AD and Kerberos Integration
    • HTTP Compression
    • Content Caching
    • SSL Hardware Acceleration
    • Features – Application Security

    • Inbound Attack Prevention
    • Outbound Data Theft Protection
    • Protection Against DDoS Attacks
    Barracuda Load Balancer ADC

    641

    • 10 Gbps Maximum Throughput
    • 250 Real Servers Supported
    • 8.5 Gbps HTTP Throughput
    • 60000 HTTPS (SSL) Throughput
    • 4 Gbps Max. Compression Throughput
    • 16,000,000 Layer 4 Concurrent TCP Connections
    • 165,000 Layer 4 TCP Connections per sec
    • 115,000 HTTP Connections per sec
    • 8,300 HTTPS (SSL) Terminations per sec (2K Keys)

    Hardware

    Features – Administration

  • Role-Based Administration
  • Connection Logging
  • Enhanced Reporting
  • SNMP Monitoring
  • REST API
    • Features – Availability

    • Layer 4 Load Balancing
    • Direct Server Return
    • Layer 7 Load Balancing
    • High Availability Cluster
    • Global Server Load Balancing
    • VLAN
    • Link Bonding (LACP)
    • Features – Application Delivery

    • SSL Offloading
    • Content Routing
    • AD and Kerberos Integration
    • HTTP Compression
    • Content Caching
    • SSL Hardware Acceleration
    • Features – Application Security

    • Inbound Attack Prevention
    • Outbound Data Theft Protection
    • Protection Against DDoS Attacks
    Barracuda Load Balancer ADC

    642

    • 10 Gbps Maximum Throughput
    • 250 Real Servers Supported
    • 8.5 Gbps HTTP Throughput
    • 60000 HTTPS (SSL) Throughput
    • 4 Gbps Max. Compression Throughput
    • 16,000,000 Layer 4 Concurrent TCP Connections
    • 165,000 Layer 4 TCP Connections per sec
    • 115,000 HTTP Connections per sec
    • 8,300 HTTPS (SSL) Terminations per sec (2K Keys)

    Hardware

    Features – Administration

  • Role-Based Administration
  • Connection Logging
  • Enhanced Reporting
  • SNMP Monitoring
  • REST API
    • Features – Availability

    • Layer 4 Load Balancing
    • Direct Server Return
    • Layer 7 Load Balancing
    • High Availability Cluster
    • Global Server Load Balancing
    • VLAN
    • Link Bonding (LACP)
    • Features – Application Delivery

    • SSL Offloading
    • Content Routing
    • AD and Kerberos Integration
    • HTTP Compression
    • Content Caching
    • SSL Hardware Acceleration
    • Features – Application Security

    • Inbound Attack Prevention
    • Outbound Data Theft Protection
    • Protection Against DDoS Attacks
    Barracuda Load Balancer ADC

    840

    • 10 Gbps Maximum Throughput
    • 500 Real Servers Supported
    • 3.6 Gbps HTTP Throughput
    • 4.2 Gbps HTTPS (SSL) Throughput
    • 4 Gbps Max. Compression Throughput
    • 20,000,000 Layer 4 Concurrent TCP Connections
    • 360,000 Layer 4 TCP Connections per sec
    • 100,000 HTTP Connections per sec
    • 24,000 HTTPS (SSL) Terminations per sec (2K Keys)

    Hardware

    Features – Administration

  • Role-Based Administration
  • Connection Logging
  • Enhanced Reporting
  • SNMP Monitoring
  • REST API
    • Features – Availability

    • Layer 4 Load Balancing
    • Direct Server Return
    • Layer 7 Load Balancing
    • High Availability Cluster
    • Global Server Load Balancing
    • VLAN
    • Link Bonding (LACP)
    • Features – Application Delivery

    • SSL Offloading
    • Content Routing
    • AD and Kerberos Integration
    • HTTP Compression
    • Content Caching
    • SSL Hardware Acceleration
    • Features – Application Security

    • Inbound Attack Prevention
    • Outbound Data Theft Protection
    • Protection Against DDoS Attacks
    Barracuda Load Balancer ADC

    841

    • 15 Gbps Maximum Throughput
    • 500 Real Servers Supported
    • 13 Gbps HTTP Throughput
    • 4.2 Gbps HTTPS (SSL) Throughput
    • 7 Gbps Max. Compression Throughput
    • 20,000,000 Layer 4 Concurrent TCP Connections
    • 360,000 Layer 4 TCP Connections per sec
    • 100,000 HTTP Connections per sec
    • 24,000 HTTPS (SSL) Terminations per sec (2K Keys)

    Hardware

    Features – Administration

  • Role-Based Administration
  • Connection Logging
  • Enhanced Reporting
  • SNMP Monitoring
  • REST API
    • Features – Availability

    • Layer 4 Load Balancing
    • Direct Server Return
    • Layer 7 Load Balancing
    • High Availability Cluster
    • Global Server Load Balancing
    • VLAN
    • Link Bonding (LACP)
    • Features – Application Delivery

    • SSL Offloading
    • Content Routing
    • AD and Kerberos Integration
    • HTTP Compression
    • Content Caching
    • SSL Hardware Acceleration
    • Features – Application Security

    • Inbound Attack Prevention
    • Outbound Data Theft Protection
    • Protection Against DDoS Attacks
    Barracuda Load Balancer ADC

    842

    • 15 Gbps Maximum Throughput
    • 500 Real Servers Supported
    • 13 Gbps HTTP Throughput
    • 4.2 Gbps HTTPS (SSL) Throughput
    • 7 Gbps Max. Compression Throughput
    • 20,000,000 Layer 4 Concurrent TCP Connections
    • 360,000 Layer 4 TCP Connections per sec
    • 100,000 HTTP Connections per sec
    • 24,000 HTTPS (SSL) Terminations per sec (2K Keys)

    Hardware


    Categories: News Tags: Tags: , , ,

    Rackspace fluffs up load balancing for clouds • The Register #rackspace #cloud #load #balancer

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    Rackspace fluffs up load balancing for clouds

    The whole point of cloud computing is to make infrastructure not only easier, but as transparent as possible. And so Rackspace Hosting, which wants to dominate commercial cloud computing, has added a much-needed feature to its cloudy infrastructure: integrated load balancing.

    Load balancing is nothing new among Rackspace’s managed-hosting customers or those using virtualized slices on the Rackspace Cloud. Josh Odom, product line leader for the Rackspace Cloud platform, tells El Reg that companies use a number of open source load balancers, such as the open source HAProxy and Nginx load balancers that are popular among its hosting and cloud customers.

    These load balancers distribute workloads across multiple machines when a customer’s applications outgrow one server (or one virtual server slice), and are also used to provide high availability for applications so that a server crash doesn’t knock them offline. And because a load balancer is a single point of failure, customers almost always have not one, but two.

    If there is anything more annoying than setting up a load balancer, it is having to set up two of them. “It is a very complicated configuration for a system administrator,” says Odom. “Many people set a load balancer up and they don’t even know it isn’t working properly until something fails.”

    After reviewing a slew of load balancers – including hardware appliances and software appliances – Odom says that Rackspace chose Zeus Technology’s Traffic Manager to be the virtual load balancer for its cloudy infrastructure and managed hosting customers alike.

    Rackspace plunks Traffic Manager on a bunch of Linux boxes in its data centers, and exposes it through the configuration screens for its cloud and hosting setup. Customers select the cloud or managed servers that they want to put on what IP addresses and get their workloads balanced “in 30 seconds,” as Odom put it.

    The load-balancing service can be used to split workloads across company sites or between Rackspace and other public clouds, too. Any public IP address can be added to the load balancer and have workloads distributed to it.

    Several hundred customers have been beta testing the load-balancing service for the past several months, and a number of them were using it to migrate workloads off other service providers’ iron and onto Rackspace machinery in a controlled fashion. (Of course, the load balancer could be used just as easily to move workloads off Rackspace iron, too.)

    Rackspace charges 18 cents per gigabyte per hour for outbound network traffic and 8 cents per gigabyte inbound for network services. The Cloud Load Balancer service costs an additional fee on top of that. Rackspace watches the number of concurrent connections per hour hitting the load balancer, and averages them for each hour. It costs 1.5 cents per hour for every 100 concurrent connections on top of the regular bandwidth fees.

    The way it works out, for most Rackspace Cloud customers, it is something on the order of $10 to $15 per month in incremental cost. And now the customers can nuke two of the physical or virtual servers, which were running other load-balancing software – and they no longer have to configure and maintain it.

    As of this morning at 11am eastern, only two hours after the product was announced, 700 customers at Rackspace had already put Cloud Load Balancers into production. ®

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