What's new in Hyperledger Fabric V2.0

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What's new in Hyperledger Fabric V2.0
blockchainexpert.uk
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• INTRODUCTION

Among enterprise-level blockchain platforms,
Hyperledger Fabric is one of the most popular
entities. Since its introduction in 2017, it is
updated regularly over time to better cope with
the industrial requirements. Being under the care
of the Linux Foundation and getting wide
community support, the platform has grown and got
adopted to production environments across the
globe at a faster pace than its competitors. Last
month, the hyperledger team came with a new major
update. That is Hyperledger Fabric v2.0. In this
blog, we are discussing those much-awaited
changes in v2.0. Read our previous blogs for
knowing more about hyperledger fabric. 1)
Overview of Hyperledger 2) An Introduction to
Hyperledger Fabric 3) Basic Terminologies of
Hyperledger Fabric
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The following are the major changes that v2.0
brings, Improvisation in decentralized
governance over chaincode Private data
enhancements External chaincode launcher
Reduced read operation latency Lightweight
docker images Improvisation in decentralized
governance over chaincode Until this update, the
permission to set the chaincode parameters on
behalf of all other participants in that channel
resides in a single organization. Even though the
others had the power to refuse its installation
and are not endorsing the transaction, it was not
easing that situation but messing it up
further. With the new chaincode life cycle, the
participant organizations are allowed to reach a
consensus on chaincode parameters like its
endorsement policy before interacting with the
ledger. Similar to this, before upgrading a
chaincode, a sufficient number of organizations
must approve.
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Similar to this, before upgrading a chaincode, a
sufficient number of organizations must
approve. Now, without repackaging or reinstalling
the chaincode, it is possible to change the
endorsement policy or private data collection
configuration. That is good, as it saves time in
the development and testing stages. There is also
a change in the default endorsement policy. The
new endorsement policy requires endorsement from
a greater number of organizations. This will also
get automatically updated every time a new
organization gets added or removed. Another cool
feature is that the organizations can now make
changes to the chaincode version they are
installing. For example, this allows
organizations to add automated checks based on
their use cases, which will be performed just
before endorsing a transaction. As long as the
required number of endorsements from
organizations is a must for transactions to
occur, the ledger remains stable. This will
bring more decentralization, which implies more
confidence inside the network participants.
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Private data enhancements Hyperledger Fabric
supports the private data feature, which enables
the communication between organizations, long
before this update. But a problem that remained
here was, the organizations have to create a
collection for each communication combination
between them. With Fabric v2.0, the organizations
are allowed to communicate with each other
privately without creating collections between
them. The new architecture provides several
configurations to achieve this much level of
flexibility. External chaincode launcher During
the development and testing phases, there needs
to install several chaincode and needs to upgrade
them several times. This is a very cumbersome
process as the chaincodes are running inside a
docker container. Each time, we have to kick
start the container for the upgraded version. For
that sole purpose, we have to run a Docker
daemon. This is a bad thing while working in a
production environment. It also required to shut
down the unused old chaincode containers
manually. Most of the time this is achieved by
running some shell script. Altogether, this
makes development painful.
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Thanks for the new update. In v2.0, by utilizing
the Docker API, chaincode can be built and
launched by the developers and operators with the
technology of their wish. Therefore, there is no
need for running Docker daemon. Another important
update is that the chaincodes no longer need to
be run inside docker containers. It is the choice
of operators to choose where to run a chaincode
including the docker container. The most
important change in v2.0 is, it supports to run
chaincode as an external service. Thats
incredible! Imagine that the chaincode is being
deployed and managed independently outside the
fabric environment. This will raise the
development experience to a whole new level. This
will also open up many more flexible solutions
like deploying chaincode on Kubernetes. A peer
can then connect to this service for chaincode
execution. Reduced read operation latency In
endorsement and validation phases several read
operations from the state database are performed.
The delays in this process slow down the entire
network speed by being a performance bottleneck.

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In v2.0, read operation latency from the state
database is reduced by using a state database
cache on CouchDB. This reduces the expensive
lookups from the state database, thus improves
the performance. Lightweight docker images In
v2.0, Hyperledger Fabric Docker images are using
Alpine Linux. It is a high security-focused
lightweight Linux distribution. This enables
building lightweight Docker images. As a result,
faster download and startup time, less disk
storage space, improved security, etc. are
achieved. This blog is featuring only the main
changes in the latest version. The intention is
to introduce you to the ever-changing blockchain
environment. There is much more in it. Well be
providing more blogs for more information.
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Read more What's new in Hyperledger Fabric
V2.0
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