SENG6210A: Software Engineering Masters Project

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SENG6210A: Software Engineering Masters
Project Part A
Project: Log Analysis

SUBMITTED BY:-DALJEET KAUR
STUDENTID:-c3298354
What is log
A log is detailed writing of tasks done by a computer program.
Incomputing, alog filekeeps the records of operating system’sactions, messages
between different users of acommunication software.Loggingis the act of keeping
a log. messages are written in a single log file.
In a clear way, logging is just a fancy word to define a process of writing
down everything you do.
There are various types of logging. We can log every operation of an
application, during the occurrence of errors, or in some critical
operations done by a user, especially if someone wants to get control of
who’s doing what for audit purposes.
Applications can log at a code level for debugging or at a user level for
audits and forbidden access register.
Every operating system has routines or services running on the
background with the task of taking notes of everything that is happening.
This way a person can detect security breaches, malfunctions etc.
In simplest way, logging is keeping a record of all data, processes, and
results in a program. This is part of a much more grand, complex
process, though, so you want to program with a clear goal in mind, and
not try to do several programming disciplines at once.
Event logs
itrecords events taking place in the execution of a system in order to provide
anaudittrailthat can be used to understand the activity of the system and to
diagnose problems. They are necessary to understand the complexity of system.
It is beneficial to combine log file entries from multiple sources. This approach along
withstatisticalanalysis, may result incorrelationsbetween seemingly unrelated
events on different servers.
Transaction log
These logs record changes in the stored data to allow the database to recover
fromcrashesor errors and maintain the stored data in a stable state. Thus,
database systems usually have both general event logs and transaction logs.
Message logs
Internet Relay Chat (IRC),instant messaging (IM)programs,peer-to-peerfile
sharing clients with chat functions, andmultiplayergames (especiallyMMORPGs)
commonly have the ability to automatically log (i.e. save) textual communication,
both public (IRC channel/IM conference/MMO public/party chat messages) and
private chat messages between users. Message logs are almost universally plain
text files, but IM andVoIPclients (which supports textual chat, e.g. Skype) might
save them inHTMLfiles or in a custom format to ease reading andencryption.
How logs are generated and used
A log is the automatically generated when any task or event occur on computer. It is
the time-stamped documentation ofeventsrelevant to a particular system. Every
kind of software application even and systems itself produce log files.
For example: -
On a Web server, anaccess loglists all the individual files that people have
requested from a website. These files will include theHTMLfiles and their imbedded
graphic images and any other associated files that get transmitted. From the server’s
log files, an administrator can identify numbers of visitors, the domains from which
they’re visiting, the number of requests for eachpage and usage patterns according
to variables such as times of the day, week, month or year.
Log Analysis Tools
As more and more companies move to the cloud, log analytics, log analysis, and log
management tools and services are becoming more critical.DevOps engineers,
system administrators, site reliability engineers, and web developers can all use logs
to makebetter data-driven decisions.
There are a lot of different log analysistools out there, below are 5 of the most
popular ones.Each one of them has its own unique search features, live tail queries,
etc. Some of thetools listed are more log management services, but they also offer
more efficient ways to analyse your logs compared to looking at the raw data.
1. Loggly
Logglyis a cloud-based logging management developed in 2009. Some of its clients
are EA, Autodesk, SendGrid, Atlassian, Sony Pictures, and Citrix.
Loggly features: -
has bothfree and paid plansstarting at $49 per month.
ability to see a bird’s eye view of your logs.
remove the noise with a few simply.
2. Logentries
It is similar tool as loggly because it is also a cloud-based logging management developed in
2010.Some of their clients are the Discovery Channel, Macy’s, LogMeIn, Yummly, and
Parallels.
Logentries Features:-
Has bothfree and paid plansstarting at $39 per month.
can filter logs in real-time, giving you much deeper insights into web
application and system events as the occur.
3.Splunk
Splunkis quite famous in the logand application management space. It is developed
in 2003 They offer great solutions for larger enterprise customers.
Splunk Features:-
has bothfree and paid plans.
offers a great way tocollect, store, index, search, correlate, visualize, analyze
and report on any machine-generated data to identify and resolve operational
and security issues in a faster, repeatable, and more affordable way.
a great way to spot and visualize possible trends.
4.logz.io
it provides real-time, actionable insights into yourlog analytics data with hosted ELK
as a service.Some of its clients are Netflix, Facebook, LinkedIn, Cisco, and
Microsoft. it is probably one of the biggest competitors to Splunk.
logz.io Features: -
has bothfree and paid plans.
can filter results by server, application, or any custom parameter until you
reachthe source of the problem
Alternative of splunk
5. GoAccess
GoAccessis a fast, terminal-based log analyser. It quickly analyses and view web
server statistics in real-timewithout needing to use your browser.
GoAccess Features:-
it is open source,
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