7-zip User manual to set best compression settings for their needs
This guide is created to help 7-zip users understand what settings do what and how to achieve best compression on their systems, for this guide I am using 7-zip gui however I believe reading this guide will help you with commend line version as well.
For the web version you can go here
http://digitalstudio7.blogspot.com/2014/03/7-zip-compression-settings-guide.html
Take a look at this pages as well
http://www.youtube.com/user/Avtoandlevan
https://twitter.com/Studio76HD
digitalstudio7.blogspot.com
How Netflix Tunes Amazon EC2 Instances for Performance - CMP325 - re:Invent 2017Amazon Web Services
At Netflix, we make the best use of Amazon EC2 instance types and features to create a high- performance cloud, achieving near bare-metal speed for our workloads. This session summarizes the configuration, tuning, and activities for delivering the fastest possible EC2 instances, and helps you improve performance, reduce latency outliers, and make better use of EC2 features. We show how to choose EC2 instance types, how to choose between Xen modes (HVM, PV, or PVHVM), and the importance of EC2 features such SR-IOV for bare-metal performance. We also cover basic and advanced kernel tuning and monitoring, including the use of Java and Node.js flame graphs and performance counters.
Embedded Recipes 2018 - Finding sources of Latency In your system - Steven Ro...Anne Nicolas
Having just an RTOS is not enough for a real-time system. The hardware must be deterministic as well as the applications that run on the system. When you are missing deadlines, the first thing that must be done is to find what is the source of the latency that caused the issue. It could be the hardware, the operating system or the application, or even a combination of the above. This talk will discuss how to determine where the latency is using tools that come with the Linux Kernel, and will explain a few cases that caused issues.
Reliability, Availability, and Serviceability (RAS) on ARM64 status - SFO17-203Linaro
Session ID: SFO17-203
Session Name: Reliability, Availability, and Serviceability (RAS) on ARM64 status - SFO17-203
Speaker: Fu Wei
Track: LEG
★ Session Summary ★
This presentation gives an updated RAS architecture on ARM64 base on RAS extension (in ARMv8.2), SDEI (Software Delegated Exception Interface), APEI, UEFI PI-SMM. Will talk about all the components of the new RAS architecture on ARM64, gives audience the current status and the next step of development.
---------------------------------------------------
★ Resources ★
Event Page: http://connect.linaro.org/resource/sfo17/sfo17-203/
Presentation:
Video: https://www.youtube.com/watch?v=NReFBzbeWi0
---------------------------------------------------
★ Event Details ★
Linaro Connect San Francisco 2017 (SFO17)
25-29 September 2017
Hyatt Regency San Francisco Airport
---------------------------------------------------
Keyword:
'http://www.linaro.org'
'http://connect.linaro.org'
---------------------------------------------------
Follow us on Social Media
https://www.facebook.com/LinaroOrg
https://twitter.com/linaroorg
https://www.youtube.com/user/linaroorg?sub_confirmation=1
https://www.linkedin.com/company/1026961
How Netflix Tunes Amazon EC2 Instances for Performance - CMP325 - re:Invent 2017Amazon Web Services
At Netflix, we make the best use of Amazon EC2 instance types and features to create a high- performance cloud, achieving near bare-metal speed for our workloads. This session summarizes the configuration, tuning, and activities for delivering the fastest possible EC2 instances, and helps you improve performance, reduce latency outliers, and make better use of EC2 features. We show how to choose EC2 instance types, how to choose between Xen modes (HVM, PV, or PVHVM), and the importance of EC2 features such SR-IOV for bare-metal performance. We also cover basic and advanced kernel tuning and monitoring, including the use of Java and Node.js flame graphs and performance counters.
Embedded Recipes 2018 - Finding sources of Latency In your system - Steven Ro...Anne Nicolas
Having just an RTOS is not enough for a real-time system. The hardware must be deterministic as well as the applications that run on the system. When you are missing deadlines, the first thing that must be done is to find what is the source of the latency that caused the issue. It could be the hardware, the operating system or the application, or even a combination of the above. This talk will discuss how to determine where the latency is using tools that come with the Linux Kernel, and will explain a few cases that caused issues.
Reliability, Availability, and Serviceability (RAS) on ARM64 status - SFO17-203Linaro
Session ID: SFO17-203
Session Name: Reliability, Availability, and Serviceability (RAS) on ARM64 status - SFO17-203
Speaker: Fu Wei
Track: LEG
★ Session Summary ★
This presentation gives an updated RAS architecture on ARM64 base on RAS extension (in ARMv8.2), SDEI (Software Delegated Exception Interface), APEI, UEFI PI-SMM. Will talk about all the components of the new RAS architecture on ARM64, gives audience the current status and the next step of development.
---------------------------------------------------
★ Resources ★
Event Page: http://connect.linaro.org/resource/sfo17/sfo17-203/
Presentation:
Video: https://www.youtube.com/watch?v=NReFBzbeWi0
---------------------------------------------------
★ Event Details ★
Linaro Connect San Francisco 2017 (SFO17)
25-29 September 2017
Hyatt Regency San Francisco Airport
---------------------------------------------------
Keyword:
'http://www.linaro.org'
'http://connect.linaro.org'
---------------------------------------------------
Follow us on Social Media
https://www.facebook.com/LinaroOrg
https://twitter.com/linaroorg
https://www.youtube.com/user/linaroorg?sub_confirmation=1
https://www.linkedin.com/company/1026961
A File Structure should be according to a required format that the operating system can understand.
A file has a certain defined structure according to its type.
A text file is a sequence of characters organized into lines.
A source file is a sequence of procedures and functions.
An object file is a sequence of bytes organized into blocks that are understandable by the machine.
File Type
File type refers to the ability of the operating system to distinguish different types of file such as text files source files and binary files etc. Many operating systems support many types of files. Operating system like MS-DOS and UNIX have the following types of files −
Ordinary files
These are the files that contain user information.
These may have text, databases or executable program.
The user can apply various operations on such files like add, modify, delete or even remove the entire file.
Directory files
These files contain list of file names and other information related to these files.
Special files
These files are also known as device files.
These files represent physical device like disks, terminals, printers, networks, tape drive etc.
A distributed system is a collection of computational and storage devices connected through a communications network. In this type of system, data, software, and users are distributed.
Useful documents for engineering students of CSE, and specially for students of aryabhatta knowledge university, Bihar (A.K.U. Bihar). It covers following topics, File concept, access methods, directory structure
UNIT II PROCESS MANAGEMENT
Processes-Process Concept, Process Scheduling, Operations on Processes, Interprocess Communication; Threads- Overview, Multicore Programming, Multithreading Models; Windows 7 - Thread and SMP Management. Process Synchronization - Critical Section Problem, Mutex Locks, Semophores, Monitors; CPU Scheduling and Deadlocks.
Linux command line cheatsheet contains useful day to day commands that are used when working with Linux Mint/Ubuntu terminal and simplifies understanding of what these commands do and when to use them.
Are you studying for the PMP Exam? Then you know that it is a challenging exam and that you have to spend a lot of time studying. But your life does not have to stop! Let me show you how you can make your studies easier: by using your "dead time" throughout the day.
A File Structure should be according to a required format that the operating system can understand.
A file has a certain defined structure according to its type.
A text file is a sequence of characters organized into lines.
A source file is a sequence of procedures and functions.
An object file is a sequence of bytes organized into blocks that are understandable by the machine.
File Type
File type refers to the ability of the operating system to distinguish different types of file such as text files source files and binary files etc. Many operating systems support many types of files. Operating system like MS-DOS and UNIX have the following types of files −
Ordinary files
These are the files that contain user information.
These may have text, databases or executable program.
The user can apply various operations on such files like add, modify, delete or even remove the entire file.
Directory files
These files contain list of file names and other information related to these files.
Special files
These files are also known as device files.
These files represent physical device like disks, terminals, printers, networks, tape drive etc.
A distributed system is a collection of computational and storage devices connected through a communications network. In this type of system, data, software, and users are distributed.
Useful documents for engineering students of CSE, and specially for students of aryabhatta knowledge university, Bihar (A.K.U. Bihar). It covers following topics, File concept, access methods, directory structure
UNIT II PROCESS MANAGEMENT
Processes-Process Concept, Process Scheduling, Operations on Processes, Interprocess Communication; Threads- Overview, Multicore Programming, Multithreading Models; Windows 7 - Thread and SMP Management. Process Synchronization - Critical Section Problem, Mutex Locks, Semophores, Monitors; CPU Scheduling and Deadlocks.
Linux command line cheatsheet contains useful day to day commands that are used when working with Linux Mint/Ubuntu terminal and simplifies understanding of what these commands do and when to use them.
Are you studying for the PMP Exam? Then you know that it is a challenging exam and that you have to spend a lot of time studying. But your life does not have to stop! Let me show you how you can make your studies easier: by using your "dead time" throughout the day.
12 Steps for Medical Device UDI Submissions to the FDA GUDIDJoe Hage
UDI regulations kick in for Implantables and Class II devices in 2015.
Reed Tech subject matter expert Gary Saner is my go-to on this subject. He covered:
• Requirements of a GUDID submission system
• Process steps in selecting/launching a GUDID system and making submissions
• Data Fields – including those that are problematic
• Data Cleaning, Harmonization, and Validation tips
• Update on FDA’s changing GUDID guidance, e.g., convenience kits and implants
• Notes in setting up a FDA GUDID account
RELEVANT FOR:
• UDI Team Leaders/Members
• Regulatory Directors/Managers/Staff
• Manufacturing, Operations, and Supply Chain Logistics Personnel
• UDI IT Support Personnel
• Compliance Officers
• Distributors with UDI Submission Responsibilities
Video at http://medgroup.biz/UDI-in-2015
Encuentro Digital CEXT con la Consejera de Trabajo e Inmigración de la Embaja...Cext
CEXT sigue dotando de herramientas a los españoles que viven en el Extranjero para que puedan resolver sus dudas. En este caso los españoles residentes en Alemania pudieron enviar sus preguntas a doña Susana Peri, Consejera de Trabajo e Inmigración de la Embajada Española en Alemania.
Le novità introdotte dalla Legge di Stabilità 2016 premiano il Welfare aziendale e introducono cambiamenti nei premi di produttività. I piani di flexible benefits diventano più appetibili anche per le PMI. Introdurre il Welfare in azienda significa agire direttamente sullo schema retributivo del lavoratore, cambiandone il paradigma e impattando positivamente su reddito, fiscalità, motivazione e produttività. Virtuosi gli effetti sull’indotto nel mondo dei servizi e prodotti alla persona che si inseriscono nelle piattaforme.
Las nuevas tecnologías no es más que últimos desarrollos tecnológicos y sus aplicaciones centrándose en los procesos de comunicación. Estos procesos los agrupamos en tres grandes áreas: la informática, el vídeo y las telecomunicaciones.
Today’s consumers are jumping from one channel to another to browse and buy. As a result, these savvy shoppers are demanding more unified retail experiences, and expect inventory, pricing, offers and marketing messages to be consistent across all channels.
To keep pace with empowered consumers, retailers must transition to omnichannel operations. During the webinar, titled: 6 Steps To Keep Pace With The Omnichannel Consumer, Heidi Chapnick, CEO of Channalysis, will discuss the key challenges retailers face as their customers become more educated and hyper-connected. Chapnick also will share her blueprint for creating a winning omnichannel strategy.
Welcome to the Live Memory Forensics class!
This is an introduction to live memory forensics
It is designed for the investigator who has digital forensic experience, and who has intermediate ability with the Microsoft Windows operating system
An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for compute programs. The operating system is an essential component of the system software in a computer system. Application programs usually require an operating system to function.
Understanding how memory is managed with MongoDB is instrumental in maximizing database performance and hardware utilisation. This talk covers the workings of low level operating system components like the page cache and memory mapped files. We will examine the differences between RAM, SSD and hard disk drives to help you choose the right hardware configuration. Finally, we will learn how to monitor and analyze memory and disk usage using the MongoDB Management Service, linux administration commands and MongoDB commands.
In computing, ZFS is a combined file system and logical volume manager designed by Sun Microsystems, a subsidiary of Oracle Corporation. The features of ZFS include support for high storage capacities, integration of the concepts of file system and volume management, snapshots and copy-on-write clones, continuous integrity checking and automatic repair, RAID-Z and native NFSv4 ACLs. Unlike traditional file systems, which reside on single devices and thus require a volume manager to use more than one device, ZFS file systems are built on top of virtual storage pools called zpools. A zpool is constructed of virtual devices (vdevs), which are themselves constructed of block devices: files, hard drive partitions, or entire drives, with the last being the recommended usage.[7] Thus, a vdev can be viewed as a group of hard drives. This means a zpool consists of one or more groups of drives.
In addition, pools can have hot spares to compensate for failing disks. In addition, ZFS supports both read and write caching, for which special devices can be used. Solid State Devices can be used for the L2ARC, or Level 2 ARC, speeding up read operations, while NVRAM buffered SLC memory can be boosted with supercapacitors to implement a fast, non-volatile write cache, improving synchronous writes. Finally, when mirroring, block devices can be grouped according to physical chassis, so that the filesystem can continue in the face of the failure of an entire chassis. Storage pool composition is not limited to similar devices but can consist of ad-hoc, heterogeneous collections of devices, which ZFS seamlessly pools together, subsequently doling out space to diverse file systems as needed. Arbitrary storage device types can be added to existing pools to expand their size at any time. The storage capacity of all vdevs is available to all of the file system instances in the zpool. A quota can be set to limit the amount of space a file system instance can occupy, and a reservation can be set to guarantee that space will be available to a file system instance.
Course 102: Lecture 27: FileSystems in Linux (Part 2)Ahmed El-Arabawy
This lecture goes through the different types of Filesystems and some commands that are used with filesystems. It introduces the filesystems ext2/3/4 , JFFS2, cramfs, ramfs, tmpfs, and NFS.
Video for this lecture on youtube:
http://www.youtube.com/watch?v=XPtPsc6uaKY
Check the other Lectures and courses in
http://Linux4EnbeddedSystems.com
or Follow our Facebook Group at
- Facebook: @LinuxforEmbeddedSystems
Lecturer Profile:
Ahmed ElArabawy
- https://www.linkedin.com/in/ahmedelarabawy
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
1. 7-zip Compression Settings Guide
Digital Studio 7
This guide is created to help 7-zip users understand what settings do what and how to achieve
best compression on their systems, for this guide I am using 7-zip gui however I believe reading
this guide will help you with commend line version as well.
For this guide I am using 7-zip version 9.32
Lets Begine:
2. 1) Archive Format: From this option you can select what archive format you want to use,
however because this guide is dedicated to 7z lets stick to it. although I recommend you take a
look at this article Best File Compression Method article.
2) Compression Level: This are presets for the settings, the names are pretty self explanatory,
the presets start from Store (This preset compression settings can not be edited because it does
not compress files) to Ultra (ultra is the highest compression preset, but we can achieve better
compression by manually editing settings)
Take a look at this table to understand better (source)
Value Description
Store No compression is used, files are just stored in archive in its original size.
Fast Fast compression.
Normal Recommended level of compression.
Maximum Better compression, but it is slower and needs more memory.
Ultra Best compression, but it is even slower and needs even more memory.
3) Compression Method: Here You can select the compression method, I recommend using
lzma2 because it is considered generally as the best compression method, It is always good idea
to default to it.
Take a look at this for more information (source)
Method Description
LZMA Default compression method of 7z format. It provides high compression ratio
and very fast decompression.
LZMA2 LZMA-based compression method. It provides better multithreading support
than LZMA. But compression ratio can be worse in some cases. For best
3. compression ratio with LZMA2 use 1 or 2 CPU threads. If you use LZMA2
with more than 2 threads, 7-zip splits data to chunks and compresses these
chunks independently (2 threads per each chunk).
PPMd Dmitry Shkarin's PPMdH algorithm with small changes. Usually it provides
high compression ratio and high speed for text files.
BZip2 Standard compression method based on BWT algorithm. Usually it provides
high speed and pretty good compression ratio for text files.
Deflate Standard compression method of ZIP and GZip formats. Compression ratio is
not too high. But it provides pretty fast compressing and decompressing.
Deflate method supports only 32 KB dictionary.
Deflate64 Modified version of Deflate algorithm with bigger dictionary (64KB).
More information about compression cooperation see the below table (source)
Compressed file size in bytes
gzip bzip2 lzma lzma -e xz xz -e lz4 lzop
1
124875819
(120M)
93997047
(90M)
85618192
(82M)
72042179
(69M)
85630688
(82M)
72069084
(69M)
165844264
(159M)
168012430
(161M)
2
119040249
(114M)
87741348
(84M)
81480824
(78M)
70264395
(68M)
81492504
(78M)
70282944
(68M)
165844264
(159M)
166987891
(160M)
3
114931686
(110M)
84816957
(81MB)
79575087
(76MB)
69015118
(66MB)
79586568
(76MB)
69029204
(66MB)
165844264
(159M)
166987891
(160M)
5
102328357
(98M)
81837328
(79M)
69557610
(67M)
67879362
(65M)
69583428
(67M)
67875988
(65M)
-
166987891
(160M)
4. gzip bzip2 lzma lzma -e xz xz -e lz4 lzop
7
100128597
(96M)
80197758
(77M)
67276420
(65M)
66868212
(64M)
67294092
(65M)
66852780
(64M)
-
116205578
(111M)
9
99740486
(96M)
78963640
(76M)
65841213
(63M)
65362226
(63M)
65859432
(63M)
65372696
(63M)
-
114824102
(110M)
gzip bzip2 lzma lzma -e xz xz -e lz4 lzop
4) Dictionary Size: This is very important parameter bigger dictionary size equals better
compression however here are couple of things to look out for:
1) Dictionary Size value difference: I noticed there is a cutoff point, where after some amount
of dictionary size you will not get a big compression size difference; for example between
4MB and 128 MB dictionary size there might be a huge compressed file size difference but
between 128 MB and 512 there might be only Couple of MB
2) Speed: The bigger the dictionary size is the longer it will take your PC to compress files.
3) System: This is very important you should take in consideration on what pc you are
compressing files and on what system you are going to decompress files. Why? the bigger your
dictionary size is more Memory(RAM) is required to complete compression and decompression.
When you change the value of Dictionary Size make sure that you will take a look at: Memory
usage for Compressing and Memory Usage for Decompressing
5. Memory usage for Compressing: Make Sure that you have more Memory(RAM) than it is
tallying you that it will use. otherwise your pc will most probably hang and require reboo.
Memory Usage for Decompressing: Make sure that on a pc you are planning on decompress
this file has more Memory(RAM) than it is asking for
5) Word Size: Higher the value the better compression you are generally going to get ( however
it is really dependent on files you are trying to compress) You might get really big difference or
might get nonexistent difference. You should keep in mind that Word Size, might almost have no
effect the size of a compressed file however it will always effect the speed of the compression so
sticking to 64 is good practice
6. 6) Solid Block Size: With this option you can enable solid compression, which can improve
compression when storing multiple similar files. However extracting or adding a single file from
an archive like this will take longer than none solid block compression. However the best
practice is manually select the size of a block, for example if you are trying to compress 5 files
and each file is 512 MB you might select block size 512MB. Block size is up to you and your
judgement or easy way out is, just stick with the preset that 7zip is offering you like 2 GB or 4
GB
for more information you can see this
7) Number of CPU threads: Select the number of your pc threads that 7z will use, more threads
will equal to faster compression, however some people say that, selecting more then 2 threads
might hurt the compression size.
8) Split to volumes: This will just split the archive at a special size you specified, for example if
you are trying to burn 2 GB of files on a CD you can tell 7z to split the archive every 650Mb,
What it will do is create couple of parts, Singe part will not be more than you specified (in our
situation 650MB) however uncompromising the files will require all the parts.
9) Update mode: This is where you can select update method
Take a look at this for more information (source)
Value Meaning
Add and replace files Add all specified files to the archive.
Update and add files Update older files in the archive and add files that are new to
the archive.
Freshen existing files Update specified files in the archive that are older than the
selected disk files.
Synchronize files Replace specified files only if added files are newer. Always
add those files, which are not present in the archive. Delete
from archive those files, which are not present on the disk.
7. 10)Create SFX archive: This will Create a Self-extracting archive you might know what this
is, You might have download a file from internet that has a 7z log and when you doable click on
it, a window appears and asks you where to extract this files. If you check SFX you are going to
create a file that will just do that Self-extracting archive.
11) Compress shared files: This option compress a file when it is open in another application.
12) Enter Password: If you enter password here the archive you are going to create will be
password protected by the password you entered.
13) Reenter password: * //Guess what to do here
14)Show Password: This will make viable the password you are entering abow
15) Encryption method: Here you select the encryption method for more information you can
take a look at this guide
16)Encrypt file names: Here you can enable or disable archive encryption.
17)Parameters: The Parameters field is for specifying any options you need that are not
available via dedicated dialog controls. for more information you can take a look here
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Used information: Thank you awesome people who worked on them.
http://digitalstudio7.blogspot.com/2013/03/best-file-compression-method.html?q=rar