Open Source Load Balancer for Linux

I know this topic is somewhat advanced for some of you, but for others hopefully this will be useful. So what is a load balancer? To better understand the term, let me explain to you a bit the meaning of load balancing.

In computing, particularly networking, load balancing is defined as evenly sharing the amount of work or load between two or more computers, network links, CPUs, or other resources in order to achieve optimum resource utilization, maximize throughput, decrease response time, and increase reliability thus maximizing uptime. Load balancing is typically utilized to moderate internal communications in computer clusters.

There are several popular open source load balancers or load balancing software applications for Linux, which can be used with almost any kind of service, including FTP, HTTP, DNS, SMTP, POP/IMAP, VoIP, etc. Here are some of them:

Linux Virtual Server

Linux Virtual Server (LVS) is the most well known and widely used Linux load sharing and balancing software. The project's main goal is to build a high-performance and highly available server for Linux using clustering technology, which provides good scalability, reliability and serviceability. The architecture of the server cluster is fully transparent to end users, and the users interact as if it were a single high-performance virtual server. The major work of the LVS project is now to develop advanced IP load balancing software (IPVS), application-level load balancing software (KTCPVS), and cluster management components.

To learn more about Linux Virtual Server (LVS), go HERE.

Ultra Monkey

Based on LVS, Ultra Monkey focuses on local area network load balancing and other highly available services using Open Source components on Linux that includes heartbeat and ldirectord from the Linux-HA project. Ultra Monkey is also producing a scalable, highly available web farm, but it can be easily expanded to other services, like FTP or e-mail.

To know more about Ultra Monkey, go HERE.

Red Hat Cluster Suite

Available as additional programs to the highly reliable Red Hat Enterprise Server distribution, Red Hat Cluster Suite provides two different types of clustering namely Application/Service Failover and IP Load Balancing. Its Cluster Manager provides application failover, while its Load Balancer gives the ability to load balance IP traffic across a farm of servers.

You can learn more about Red Hat Cluster Suite HERE.


High-Availability Linux

High-Availability Linux (Linux-HA) project provides a high-availability and advanced solution across different operating system platforms. It promotes reliability, availability, and serviceability (RAS). Its main product is called Heartbeat, a GPL-licensed portable cluster management program for high-availability clustering.

To know more about High-Availability Linux, go HERE.

VERY OLD AND RARE PICTURE FOR EGYPT

صور قديمة جداً الكنيسه قصاد حريه مول ميدان روكسى المتحف المصرى امال فين العربيات والمتروهات الاهرامات والنيل بيجرى قدامها صوره لابو الهول من 100 سنه صوره لابوالهول والهرم ! سائحة متصورة و هي فوق الهرم و تحت خالص باين فندق مينا هاوس محاولة لتسلق الهرم سنة 1875 مصر الجديدة.. ميدان الجامع.. شارع هارون الرشيد سباق مصر الجديدة.. مكان الميريلاند عقد زواج مينو من زبيده المصريه الجامعه الامريكيه نادى هيلتون للجولف شارع العروبه مصر الجديده شارع قصر النيل كوبري قصر النيل و برضه جمال و حمير طيب تعرفوا ليه بيندهوا لأي حد اسمه إسماعيل بأبو السباع؟ أول ما الخديوي اسماعيل أنشأ كوبري قصر النيل و حط السباع على أول الكوبري المصريين كانوا بدل ما يقولوا الخديوي اسماعيل كانوا بيقولوا عليه أبو السباع.. و عنها، طلعت ابو السباع على كل اسماعيل كوبرى ابو العلا ميدان الاوبرا 1 ميدان الاوبرا 2 ميدان رمسيس محطه مصر ميدان محطة مصر - تمثال نهضة مصر مكان تمثال رمسيس  ميدان سليمان باشا ميدان سليمان باشا 1908 ميدان سليمان باشا سنه1929 الجامعة الأمريكية بميدان التحرير شارع عبد العزيز ايوه هو بتاع العتبه شارع شبرا المولد زماااااااااااااااااااان ودى بقا صوره لبولاق  روكسي و الترماي الأبيض تذكره العضويه بتاعه النادى الاهلى مصريين بيملوا مية من حنفية عمومية.. و الباشا الخواجة معدي.. شاويش زمان العطار سنه1870 بائع السمك طول عمر المصريين اصحاب كيف حتى سنه 1870 قناه السويس ايام الحفر كتيبة من الجنود الأستراليين إبان الاحتلال البريطاني لمصر كانوا واخدين مينا هاوس معسكر ليهم عند الأهرامات و واحد فيهم بيلعب مع الكنغر. جايبين معاهم كناغر من بلدهم

Avaya grabs Nortel's telecoms biz for $900m

Staves off Siemens

By Austin Modine •

Avaya has won an auction for Nortel's enterprise telecoms business, beating out rival bidder, Siemens Enterprise Communications.

The company will pay $900m cash for the unit, nearly double the $475m it initially offered during so-called stalking horse bidding as part of Nortel's bankruptcy-court proceedings. Avaya will also pay an additional $15m for an employee-retention program.

Nortel filed for bankruptcy protection in January after years of losses and an accounting scandal. Nortel sold its wireless business to Ericsson in July for $1.13bn following a similar process.

Avaya was forced to sharply raise its offer after Siemens entered the formal bidding. Also included in the sale are Nortel's shares in Nortel Government Solutions Inc. and DiamondWare Ltd.

"Our successful bid brings us closer to adding Nortel and its complementary channel, portfolio, research and development, and global presence to Avaya," Avaya's chief executive Kevin Kennedy said in a statement.

"It is our intention to announce an integrated product and services roadmap as soon as we have these items identified through a thorough integration process. At this time, we cannot speculate further on details."

Last week, Verizon said it was ready to oppose the sale, citing national security concerns, if Avaya wouldn't agree to take up existing Nortel contracts. Verizon buys and resells Nortel kit to branches of the US government, including Congress, the military, and anti-terrorism agencies. Avaya said it is in talks with Verizon to reach a resolution.

Avaya aims to close the sale within the fourth quarter, subject to approvals from courts in the US, Canada, France and Israel as well as regulatory clearances and other conditions.

Nortel will seek Canadian and US court approvals at a joint hearing on September 15, 2009. In some EMEA jurisdictions, the transaction is subject to consultation with employee representatives. ®