9. Types and Methods of Load Balancing || F5 Big IP LTM
Summary
TLDRThis YouTube tutorial from Noor Networks explores various load balancing methods in F5 Big-IP. It distinguishes between static and dynamic load balancing, detailing round robin and ratio-based methods. The video also explains dynamic load balancing techniques like observed and predictive ratios, list connection, and fastest methods. It highlights how static methods ignore server performance, while dynamic ones consider it. The tutorial promises a follow-up on configuring these methods.
Takeaways
- 🔄 **Static vs Dynamic Load Balancing**: Load balancing is categorized into static and dynamic types, with static not considering server performance.
- 🔄 **Round Robin Method**: A static method where client connections are evenly distributed among pool members, regardless of server performance.
- 🔄 **Ratio-Based Load Balancing**: Connections are distributed based on a predefined ratio, with higher ratios receiving more connections.
- 🔄 **Dynamic Ratio-Based Load Balancing**: Requests are distributed based on dynamically assigned ratios, considering server performance.
- 🔄 **Node-Based Load Balancing**: Considers total connections forwarded to a server device, which can be from one or multiple server pools.
- 🔄 **Pool Member-Based Load Balancing**: Focuses only on connections from a specific server pool, application, or service port.
- 🔄 **Least Connection Method**: Connections are sent to the server device with the least number of active connections, considering server performance.
- 🔄 **Fastest Node Method**: Requests are routed to the server device with the fastest response rate, based on active connections.
- 🔄 **Administrative Control**: In static methods, admins can define ratio values, while dynamic methods assign these values automatically based on performance.
- 🔄 **Upcoming Tutorials**: Future tutorials will cover the configuration of these load balancing methods step by step.
Q & A
What are the two main types of load balancing discussed in the video?
-The two main types of load balancing discussed are static load balancing and dynamic load balancing.
How is static load balancing different from dynamic load balancing?
-Static load balancing does not consider the server device performance and sends requests irrespective of the device's condition. Dynamic load balancing, on the other hand, considers the server device performance when distributing requests.
What are the subcategories of static load balancing mentioned in the script?
-The subcategories of static load balancing mentioned are round robin load balancing and ratio-based load balancing.
What does round robin load balancing involve?
-Round robin load balancing involves distributing client connections evenly and alternately among all the pool members of the server pool.
What are the three different methods of dynamic load balancing discussed?
-The three different methods of dynamic load balancing discussed are list connection, fastest, and ratio.
How does ratio-based dynamic load balancing work?
-Ratio-based dynamic load balancing works by distributing client requests based on dynamically assigned ratio values, with higher ratio values receiving more connections.
What is the difference between ratio observed and ratio predictive in dynamic load balancing?
-In ratio observed, the ratio value assigned is 3 to 2, whereas in ratio predictive, it is 4 to 1. The difference lies in the ratio values assigned to servers with fewer and more connections.
What does 'list connection' load balancing method imply?
-In the 'list connection' method, client connections are distributed to the server device with the least number of connections.
How does the 'fastest' load balancing method distribute client connections?
-The 'fastest' load balancing method distributes client connections to the server device with the fastest response rate, typically the one with fewer active connections.
What does load balancing based on node consider?
-Load balancing based on node considers the total connection forwarded to the server device, which can be from one server pool or multiple server pools.
What is the difference between load balancing based on node and pool member?
-Load balancing based on node considers total connections from all server pools, while load balancing based on pool member considers only connections from a specific server pool.
Outlines
🌐 Introduction to Load Balancing in F5 BIG-IP
This paragraph introduces the tutorial on load balancing in F5 BIG-IP. It explains the two main types of load balancing: static and dynamic. Static load balancing is further divided into round robin and ratio-based methods. Round robin was covered in a previous tutorial. Dynamic load balancing is subdivided into list, connection, fastest, and ratio-based methods, with ratio-based further divided into observed and predictive. The paragraph emphasizes the difference between static and dynamic load balancing, particularly how static does not consider server performance, whereas dynamic does.
🔄 Static and Dynamic Load Balancing Methods
This section delves into the specifics of static and dynamic load balancing methods. It discusses how static load balancing, such as round robin and ratio static, distributes client requests without considering server performance. The ratio static method allows administrators to set the ratio values, influencing the number of connections each server receives. Dynamic load balancing methods, like observed and predictive, assign ratio values based on server performance and connection counts, with predictive using a different ratio (4:1) compared to observed (3:2). The paragraph also introduces list connection and fastest methods, which consider server performance and assign requests to the least connected or fastest responding server, respectively.
🔚 Conclusion and Preview of Future Tutorials
The final paragraph wraps up the tutorial by summarizing the discussed load balancing methods and hints at future tutorials where each method will be configured individually. It encourages viewers to subscribe to the YouTube channel for more content and thanks them for watching.
Mindmap
Keywords
💡Load Balancing
💡Static Load Balancing
💡Dynamic Load Balancing
💡Round Robin
💡Ratio Based Load Balancing
💡Dynamic Ratio Based Load Balancing
💡List Connection
💡Fastest Method
💡Node
💡Server Pool
💡F5 Big-IP
Highlights
Introduction to different types and methods of load balancing in F5 Big-IP.
Classification of load balancing into static and dynamic load balancing.
Explanation of static load balancing and its two subcategories: round robin and ratio-based.
Description of round robin load balancing method.
Introduction to dynamic load balancing and its three subcategories: list, connection, and fastest.
Further classification of dynamic ratio-based load balancing into observed and predictive.
Difference between static and dynamic load balancing in terms of server device performance consideration.
Explanation of load balancing based on node, considering total connections forwarded to the server device.
Support for ratio, static, and dynamic load balancing methods when based on node.
Load balancing based on pool member, considering only connections from a specific server pool.
Support for ratio-based, static, and dynamic load balancing methods when based on pool member.
Description of round robin static load balancing method and its even distribution of client connections.
Explanation of ratio static load balancing method and how it distributes client connections based on assigned ratio values.
Introduction to ratio Dynamic Observed load balancing method and its dynamic assignment of ratio values.
Difference between observed and predictive ratio-based load balancing methods in terms of ratio value assignment.
Description of list connection load balancing method and its distribution of client connections to the server device with the least number of connections.
Introduction to the fastest load balancing method and its distribution of client connections based on server response rate.
Announcement of the next tutorial covering the configuration of different load balancing methods.
Call to action for viewers to subscribe to the YouTube channel and share the tutorial.
Transcripts
hello everyone welcome to my YouTube
channel Noor Networks
in this tutorial we'll discuss about
different types and methods of load
balancing in F5 big-ip
so when we talk about different types of
load balancing the load balancing is
classified as static load balancing and
dynamic load balancing
static load balancing is further
classified
into a round robin load balancing method
and ratio based load balancing method
round robin method we have configured in
our previous tutorial
moving on Dynamic load balancing is
further classified into three different
load balancing method they are list
connection
fastest and ratio
ratio based Dynamic ratio based load
balancing is further classified into
ratio observed and ratio predictive
so the major types of load balancing are
static and dynamic the static load
balancing when we talk about a static
load balancing it doesn't consider the
server device performance like if your
server device performance is slow or it
has some issue or something it will not
consider whenever the client request
come it will straight away send the
request irrespective of the device
performance
but this is not the case with the
dynamic load balancing
Dynamic load balancing do consider the
service device server device performance
for performing a load balancing
when we will move further and discuss in
detail you will understand
like what exactly is done in static load
balancing and how it doesn't consider
the device performance server device
performance uh then how the dynamic load
balancing differs
now comes the load balancing based on
node
as we know a node can be a member of
multiple server pool
as you can see over here the node one is
a member of FTP pool
but a node is a member of FTP pool as
well as a web server pull
and Note 3 is a member of web server
pool
load balancing based on node consider
total connection forwarded to server
device
whether it can be from one server pool
or from multiple server pool
so as you can see over here Node 1 has
received 10ftp connections and Note 3
has received web connections but if you
will see over here the node has received
10 FTP connections and 10 connections
so in total node has received 20
connections
this is what it means like
the total connection forwarded to server
device
when you select a load balancing based
on node
consider
total connection forwarded to server
device it can be from one server pool or
from multiple server pool
so the load balancing method supported
over here are ratio static and dynamic
list connection and fastest
the next com load balancing based on
pool member
when you select a load balancing based
on pool member it consider only
connection from specific server pool
application or a service port
so this is the reason you can see over
here node one
has
10 connections node has 10 connections
and even Note 3 has 10 connections
load balancing method supported over
here are
ratio based food balancing static and
dynamic list connection and fastest
see
next comes round robin static load
balancing method
in round robin the client connections
are distributed evenly and alternatively
among all the pool members of the server
pool
so whenever the request
the client
what is going to happen is the first
request will go to Node 1 the second
request will go to node 2 third request
will go to node 3 then again the fourth
request will go to node one it will be
distributed evenly
as we have discussed earlier also it's a
static load balancing method it does not
consider server device performance
whether the server device performance is
low or whatever it is it will evenly
distribute the client connections
request
it does not support node or pool member
assignment
next comes ratio static
client connection request distributed on
basis of what ratio value assigned to
each server device
and you as the admin can decide this
ratio value
so
what you can do is accessing the web GUI
of the F5 Appliance you can
Define the static value you can Define
the ratio on your own
and the logic is very simple over here
higher ratio higher number of connection
lower ratio lower number of connections
so as you can see over here the Node 1
ratio value is 5.
the node 2 ratio value is 3 the node 3
ratio value is 1.
so accordingly
you are getting 10 connections on the
Node one
seven connections on node two three
connections on node 3.
in static ratio load balancing it
doesn't consider
performance of server device but its
support node or a pool member based load
balancing
ratio Dynamic observed
in ratio Dynamic observed load balancing
method client requests are distributed
based on dynamically assigned ratio
value logic is same higher ratio value
device receives more connection and less
ratio value device receives less
connection
but this ratio value is assigned by load
balancer dynamically
because it is a dynamic load balancing
method and the admin cannot Define the
ratio value over here
so the server with less connections are
assign ratio value 3 and server with
more connection are assigned ratio value
2 so it is 3 is to 2 ratio value
and being an admin you cannot Define
since it is a dynamic load balancing
method the load balancer will
dynamically assign the ratio when you
select the
load balancing method as ratio Dynamic
observed
since it is a dynamic load balancing
method it do consider server device
performance for assigning ratio value
and also supports node or pool member
assignment
next comes
ratio
based load balancing Dynamic productive
over here client requests are
distributed based on dynamically
assigned ratio value everything will
remain same what we have seen in
ratio observed the similar things will
be over here only the
ratio value over there in the observed
load balancing method was 3 is to 2 over
here it will be 4 is to 1 which means
that server which left less connections
are assigned ratio value 4 and server
with more connections are assigned ratio
value when only the difference between
this load balancing method is about the
ratio value
in observed load balancing method the
ratio value assign is 3 is to 2 in
predictive it is 4 is to 1.
list connection
as the name implies in this load
balancing method a client connection is
distributed to server device with least
number of connection load
as you can see over here
Node 1 has 10 connections whereas node
has 7 connection and node 3 has three
connections so the client request coming
to load balancer the load balancer will
shift the request to the server device
which has list connection since node 3
has only three connection which is the
last number the request will go to
server 3.
this load balancing method consider
server device performance and support
node pool member assignment as you can
see it is clearly the figure itself says
that it is checking for the device
performance the device which has the
least connection the request is sent
over there
the next comes the fastest method
in this load balancing method client
connection is distributed to the server
device whose response rate is very fast
as you can see over here in the figure
mode 1 has 20 active connections node 2
has 15 active connections whereas node 3
has 5 Active connections
since node 3 has 5 Active connections
the response rate of This Server will be
high as compared to Node 1 and node 2.
so the client request coming to the F5
load balancer will be sent to node 3
which has five active connection
this load balancing method considers
server device performance and supports
node or pool member assignment
so that's all guys about the different
types of load balancing and methods
in the next tutorial we will be
configuring different different types of
load balancing method one by one
if you haven't subscribed to my YouTube
channel yet please subscribe it now and
do share with your friends thanks for
watching and see you in the next
tutorial
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