This document describes the modules and requirements for a software rejuvenation project. There are six modules that implement cold and warm rejuvenation techniques for the operating system, virtual machines, and virtual machine monitor. The modules are: 1) OS cold reboot, 2) OS warm reboot, 3) VM cold reboot, 4) VM warm reboot, 5) VMM reboot, and 6) VM migration. The project will collect system status, check for aging factors, track time against a rejuvenation schedule, and store process state to resume after rejuvenation. Requirements include supporting Linux distributions, required software like KVM and NFS, hardware specs, and functional needs like high availability and portability.
Implementing Flash Storage for SQL Server from ViridentVirident
Performance, requirements, implications of Flash storage solutions for SQL server deployment.
Visit http://www.virident.com/solutions/ms-sql-server/ for flash storage solutions for SQL server.
Evaluating the performance and behaviour of rt xenijesajournal
Virtualization, together with real
-
time support
emerges to
be used in an
increasing amount of use cases,
varying
from embedded system
s
to enterprise computing
. One of the most popular
open
-
source
virtualization
softw
are’s
is
Xen
.
Its current implementation does not qualify it to be
a candidate for
time
-
critical systems. Researchers
and developers extend
ed
it
and claim
the
efficient usage
of their versions
in
such systems.
RT
-
Xen is one of these versions. It is a vir
tualization platform based on Compositional Scheduling and uses
a suite of fixed
-
priority schedulers.
This paper evaluates the performance and scheduling
behaviour
of RT
-
Xen.
The test results show that only
two
proposed
schedulers
are
suitable
to be used
for
soft
real
-
time applications.
https://tranxition.com/wp-content/uploads/2019/01/Tranxition-Migration-Manager-SCCM-Integration-Guide.pdf
Integration guide for Tranxition Migration Manager to “snap into” Microsoft System Center Configuration Manager (or SCCM).
Implementing Flash Storage for SQL Server from ViridentVirident
Performance, requirements, implications of Flash storage solutions for SQL server deployment.
Visit http://www.virident.com/solutions/ms-sql-server/ for flash storage solutions for SQL server.
Evaluating the performance and behaviour of rt xenijesajournal
Virtualization, together with real
-
time support
emerges to
be used in an
increasing amount of use cases,
varying
from embedded system
s
to enterprise computing
. One of the most popular
open
-
source
virtualization
softw
are’s
is
Xen
.
Its current implementation does not qualify it to be
a candidate for
time
-
critical systems. Researchers
and developers extend
ed
it
and claim
the
efficient usage
of their versions
in
such systems.
RT
-
Xen is one of these versions. It is a vir
tualization platform based on Compositional Scheduling and uses
a suite of fixed
-
priority schedulers.
This paper evaluates the performance and scheduling
behaviour
of RT
-
Xen.
The test results show that only
two
proposed
schedulers
are
suitable
to be used
for
soft
real
-
time applications.
https://tranxition.com/wp-content/uploads/2019/01/Tranxition-Migration-Manager-SCCM-Integration-Guide.pdf
Integration guide for Tranxition Migration Manager to “snap into” Microsoft System Center Configuration Manager (or SCCM).
Proper resource allocation is critical to achieving top application performance in a virtualized environment. Resource contention degrades performance and underutilization can lead to costly server sprawl.
We found that adding VMTurbo to a VMware vSphere 5.5 cluster and following its reallocation recommendations gave our application performance a big boost. After reducing vCPU count, increasing memory allocation to active databases, and moving VMs to more responsive storage as VMTurbo directed, online transactions increased by 23.7 percent while latency dropped significantly. Avoid the pitfalls of poorly allocated VM resources and give your virtualized application every advantage by gaining control of your environment at every level.
AIX VIO tutorial to learn basics. Welcome to VIO introduction demo session. Know its importance and other useful details. AIX VIO server information also have to be receive by you. Know regarding various concepts covered. Be aware of fundamentals from Virtual I/O server tutorial.
Our real time faculty has 8 years of experience in multiple domains. You need to get various details from VIO tutorial. Here I/O is input, output. Participants required find correct information on this AIX VIO tutorial. Take part in this session till end.
After this session you should about to understand.
List the reasons for implementing virtual I/O.
Describe the implementation of virtual I/O.
Install and configure the virtual I/O server product.
Configure a partition to use virtual devices.
Describe and configure virtual optical device backed by file.
Virtual I/O introduction:
What is virtual I/0?
VMworld 2013: VMware vCenter Site Recovery Manager – Solution Overview and Le...VMworld
VMworld 2013
Mauricio Barra, VMware
Learn more about VMworld and register at http://www.vmworld.com/index.jspa?src=socmed-vmworld-slideshare
Thomas McQuillan, UnitedHealth Group
Proper resource allocation is critical to achieving top application performance in a virtualized environment. Resource contention degrades performance and underutilization can lead to costly server sprawl.
We found that adding VMTurbo to a VMware vSphere 5.5 cluster and following its reallocation recommendations gave our application performance a big boost. After reducing vCPU count, increasing memory allocation to active databases, and moving VMs to more responsive storage as VMTurbo directed, online transactions increased by 23.7 percent while latency dropped significantly. Avoid the pitfalls of poorly allocated VM resources and give your virtualized application every advantage by gaining control of your environment at every level.
AIX VIO tutorial to learn basics. Welcome to VIO introduction demo session. Know its importance and other useful details. AIX VIO server information also have to be receive by you. Know regarding various concepts covered. Be aware of fundamentals from Virtual I/O server tutorial.
Our real time faculty has 8 years of experience in multiple domains. You need to get various details from VIO tutorial. Here I/O is input, output. Participants required find correct information on this AIX VIO tutorial. Take part in this session till end.
After this session you should about to understand.
List the reasons for implementing virtual I/O.
Describe the implementation of virtual I/O.
Install and configure the virtual I/O server product.
Configure a partition to use virtual devices.
Describe and configure virtual optical device backed by file.
Virtual I/O introduction:
What is virtual I/0?
VMworld 2013: VMware vCenter Site Recovery Manager – Solution Overview and Le...VMworld
VMworld 2013
Mauricio Barra, VMware
Learn more about VMworld and register at http://www.vmworld.com/index.jspa?src=socmed-vmworld-slideshare
Thomas McQuillan, UnitedHealth Group
How to start loving everything about your workDuma Works
This presentation was held at GDays14 (http://gdayskenya14.appspot.com/) by Linus Lennstrand, CTO at Duma Works. It's about the basics of Lean Software Development and how to make it not suck working as a developer.
1. What is the value of requiring the OS to provide status informati.pdfudit652068
1. What is the value of requiring the OS to provide status information?
2. What is the difference between a true layered structure and the way that MS-DOS
used layering?
3. Why is an operating system thought to be a \"mandatory middleman\"?
§ be able to explain the services and value of this
4. What is a virtual machine and why is it necessary?
§ How does it work (i.e., be able to discuss and/or draw a VM structure in a
computer system)
5. Why is debugging a concern for an OS?
§ How can it be accomplished?
6. Why is a bootstrap loader needed?
Solution
Ans 1. In context switching among process before a process switched we have to store
PCB(Process control Block) by the Operating System.It consists of Process State,Program
Counter,Values of Registers,CPU Sheduling Information,Memeory Management
Information,Accounting Information and IO Status Information.
Value of Status Information is such as How much devices are allocated /occupied,Open File
Tables information etc.
Ans.2
In MS-DOS
Application Program -> Resident system Program->MS-DOS Device Drivers-
>ROM-BIOS Device Drivers
This architecture is applied. There is no well-structured architecture is defined. There is no
CPU Execution Mode (Kernel and User) So if there is error whole system is crashed.
In case of Layered approach it follows modular approach. OS is broken into the layer Bottom
Layer which is hardware and Top Layer is User. Its main advantage is simplicity of construction
and debugging. If error is found at any layer it remains same on that layer system does not crash.
Ans 3.
Operating system work as a middleman between a user and computer hardware.Its main
objective to make system convenient to use and utilitze computer hardware in efficient
manner.Variuos types of OS are there such as-INIX,MS-DOS,Windows-98/XP/Vista,Windows-
NT/2000,OS/2 and Mac OS.
It provides its service to user as well as Programs too:
To Program it provide environment to exceute .
To user provide platform to execute the program.
These are following services provided by OS:-
6.) Error Detection-
Ans 4:
Virtual Machine- It is based on computer architecture, it is an emulation of a computer system.It
also provides the functionality of physical computer Too.
It is of following type like:-
Advantage Of Virtual Machine:-
Architecture:-
Guest Operating System and Application
|
Virtual Machine
|
Virtual Server 2005
|
Windows Server 2003(Host OS)
|
Physical Computer
Ans.5
Debugging is a concern for an OS.As it made up of multi layered architecture so it is easier to
find at which layer error is prone .There is two mode for debugging User Mode and Kernal
Mode.Kernal mode debugging is very hard. Because we can not rely on crashing machine to
communicate that what happened.
There are four methods of debugging an operating system:-
Sanity Checks
Debugger
Deterministic Reply
Moving Everything to User Space
Ans 6.)Bootstrap Loader:- It is a program that is required to loads an operating system after
completion on power-on .
The BOOT LOADER is also known as Bootstrap Loader. The BOOT LOADER pattern describes the mechanisms that are necessary to start a computer, from being switched on, up to full operability. In order to run-up into a defined state of operation, with the operating system initialized and started, a sequence of single bootstrap steps is performed, each gaining a higher level of operability. This technique also supports flexibility in different dimensions, e.g. selecting a software version, a boot device, or even updating the whole software. General Purpose Computers (such as PCs, workstations, mainframes), Embedded Systems.
Virtualization is the creation of a virtual (rather than actual) version of something, such as an operating system, a server, a storage device or network resources.
Concept of processes, process scheduling, operations on processes, inter-process communication,
communication in Client-Server-Systems, overview & benefits of threads.
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Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
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1. RV College Of Engineering Software Rejuvenation
Dept Of Information Science Page 6
Chapter 2
SOFTWARE REQUIREMENT AND SPECIFICATION
2.1 Project Description
In this project, we implement six different modules of rejuvenation. These modules are on OS
VM and VMM. Here we implement Cold and Warm rejuvenation techniques for OS VM and
VMM. Each module consist of unique working method, which is explain below
2.2 Module Description
There are mainly six modules, they are: OS cold reboot, OS warm reboot, VM cold reboot, VM
warm reboot, VM migration, VMM reboot.
1. Module for OS Cold rejuvenation
In Cold OS reboot process, the system is rebooted immediately at rejuvenation point.
Rejuvenation point is a point where memory consumption of system reaches a threshold value or
predetermined time. When system consumes high amount of ram the OS must be rebooted,
clearing all internal states. Memory consumption may be done by applications or error prone
codes which run for long time consuming large amount of RAM or OS itself
In this process the memory left is compared to our pre-determined threshold value, if the
memory left is greater than the threshold value, the system is allowed to run in normal state i.e.
system have not reached the threshold point of consumption. If it is lesser i.e. the system have
consumed memory greater than the threshold point, then OS is restarted immediately
The amount of free memory left is extracted and compared with predetermined threshold free
memory value, on results of comparison obtained, further process is taken care.
2. RV College Of Engineering Software Rejuvenation
Dept Of Information Science Page 7
2. Module for OS warm rejuvenation
In OS warm reboot process, before rebooting the kernel state is saved, including all applications
running on kernel, their sates are saved .saving the kernel state is done by creating a complete
image of kernel.
OS reboot process is divided in two stages 1) Suspend, 2) Resume. In Suspend stage kernel is
called to create a snapshot of current system state later snapshot data is written to disk, finally
system is rebooted. In Resume stage, when the system is turned on, grub loader runs from initrd
before mounting any partitions, later all the data of snapshot is read from disk and loaded to
kernel, kernel restores the image and thus system runs from same state where it was suspended.
3 Module for VM cold reboot
In VM cold reboot process, the VM is rebooted immediately at rejuvenation point, hypervisor is
untouched. Rejuvenation point is a point where memory consumption of system reaches a
threshold value or predetermined time. When VM consumes high amount of ram the VM must
be rebooted, clearing all internal states. Memory consumption may be done by applications or
error prone codes which run for long time consuming large amount of RAM or OS itself
In this process the memory left is compared to our pre-determined threshold value, if the
memory left is greater than the threshold value, the system is allowed to run in normal state i.e.
System have not reached the threshold point of consumption. If it is lesser i.e. the system have
consumed memory greater than the threshold point, then rejuvenation time is optimized and
updated to predetermined time, when rejuvenation time is equal to system time then VM is
restarted immediately without saving any state of running VM.
4 module for VM warm reboot
3. RV College Of Engineering Software Rejuvenation
Dept Of Information Science Page 8
In VM warm reboot process, before rebooting the kernel state of particular failing VM is saved,
including all applications running on kernel, their sates are saved .saving the kernel state is done
by creating a complete image of kernel.
VM reboot process is divided in two stages 1) Suspend, 2) Resume. In Suspend stage kernel is
called to create a snapshot of current system state later snapshot data is written to disk, finally
system is rebooted. In Resume stage, when the system is turned on, grub loader runs from initrd
before mounting any partitions, later all the data of snapshot is read from disk and loaded to
kernel, kernel restores the image and thus system runs from same state where it was suspended.
Here this module provide decrease in request failures and high availability to the VM.
5 module for VMM reboot
In VMM cold reboot process, the VMM is rebooted immediately at rejuvenation point, all the
VM’s running on VMM are shut down before rebooting VMM. Rejuvenation point is a point
where memory consumption of system reaches a threshold value or predetermined time. When
VMM consumes high amount of ram the VMM must be rebooted, clearing all internal states.
Memory consumption may be done by applications or error prone codes which run for long time
consuming large amount of RAM.
In this process the memory left is compared to our pre-determined threshold value, if the
memory left is greater than the threshold value, the system is allowed to run in normal state i.e.
System have not reached the threshold point of consumption. If it is lesser i.e. the system have
consumed memory greater than the threshold point, then rejuvenation time is optimized and
updated to predetermined time, when rejuvenation time is equal to system time then VM is
restarted immediately without saving any state of running VM, If VMM memory consumption
reaches its peak point i.e. VMM tending to crash in soon time then VMM is restarted even if all
VM is running in normal state and no state, data is saved but user is given period of one minute
user can cancel the rebooting process or shutdown the VMM completely.
4. RV College Of Engineering Software Rejuvenation
Dept Of Information Science Page 9
6. Module for VM migration
In this module, VM from the failing server is transferred to preconfigured secondary server
before the VM tending to fail, the complete data and application running on the main server is
transferred to the secondary with no interruption for application running. When the complete VM
is transferred to another server and loaded, all the applications which were running in main
server will be in same state even after transferred with no loss of data of applications running. As
this is all done by configuring NFS for both servers and configuring virtual manager and virish
packages initially, applying this concept to our project software rejuvenation, when the server get
huge load of request or high memory is consumed which may lead to hang/crash or failure of the
system, when user set the rejuvenation time and threshold memory value, rejuvenation manager
checks for aging problem in system and if aging problem is detected then the rejuvenation timke
predetermined by user is optimized and system is rejuvenated at rejuvenation time, here for
rejuvenation we use migration technique to migrate the VM running and reboot the server, hence
we provide high availability and decrease in request failure.
2.3 Software requirements:
Table 2.1 Software requirements
Minimum Requirements
Operating
System
Cent OS
Ubuntu OS
Other JDK must be installed to run java codes
KVM/QEMU must be installed on both the servers.
NFS must be configured on both the system to migrate the VM
Note: KVM is a hypervisor or Virtual Machine Monitor, NFS (Network
File System) is distributed file system protocol.
5. RV College Of Engineering Software Rejuvenation
Dept Of Information Science Page 10
2.4 Hardware Requirements:
Table 2.2: Hardware Requirements
Minimum Requirements
Processor
Intel Pentium or better
Memory
2 GB RAM
Hard Disk
100 GB of hard disk space required.
Display
1024x 768 or higher-resolution display with 16 bits colors
2.5 Performance Requirements:
Availability
The system shall achieve 100 percent availability at all time.
Portability
The system should be implemented by the java so it can move easily from one system another
system because it is purely platform independent.
Scalability
The system shall uses in multiple approaches.
Maintainability
The system should be optimize for supportability, or ease of maintenance as for as possible. This
may be achieved through the use documentation of coding standard, naming conventions, class
libraries and abstraction.
Language C, JAVA.
6. RV College Of Engineering Software Rejuvenation
Dept Of Information Science Page 11
2.7 Functional requirements:
As per the functional requirement specifications, the project shall provide following facilities
The system collects the current status of the workload based on the RAM utilized by the
running application.
Check the aging factor which degrades the availability to application. If any aging factor
detected then it will notify.
The system collects the status of the system periodically.
This system keeps track of the system time and it is compared with fixed rejuvenation
schedule. If the tracking time is equal to fixed rejuvenation schedule then the system
rejuvenated.
This system stores the current status of the process; it is useful to again resume the
processor after system rejuvenation takes place.