National Repository of Grey Literature 136 records found  beginprevious117 - 126next  jump to record: Search took 0.01 seconds. 
T-Mobile MDA II in Linux
Michl, Zbyněk ; Michal, Bohumil (referee) ; Kašpárek, Tomáš (advisor)
MSc. thesis deals with mobile digital assistant T-Mobile MDA II running Linux operating system. The first part presents device identification and parameters' specification of the MDA II. The second part focuses on selection of GNU distribution with Linux bootloader and Linux kernel support comparison. The subject of the last part is MDA II component code implementation and its merging into Linux kernel.
Information System for Geocaching
Kuchta, Michal ; Kubíček, Radek (referee) ; Kašpárek, Tomáš (advisor)
The work contains presentation of the Geocaching game, mainly from the view of an information system. It contains study of existing applications with their advantages and disadvantages. There is a specification of new application, that should solve major disadvantages of existing products in second part of the work. Design of such application, that meets the requirements, follows. The application is implemented, which is described in following chapters, with the aim to target specific problems that were solved during the implementation. There is summary and future plans cotained in the closing chapter.
An Efficient Way to Allocate and Read Directory Entries in the Ext4 File System
Pazdera, Radek ; Michal, Bohumil (referee) ; Kašpárek, Tomáš (advisor)
Cílem této práce je zvýšit výkon sekvenčního procházení adresářů v souborovém systému ext4. Datová struktura HTree, jenž je v současné době použita k implementaci adresářu v ext4 zvládá velmi dobře náhodné přístupy do adresáře, avšak není optimalizována pro sekvenční procházení. Tato práce přináší analýzu tohoto problému. Nejprve studuje implementaci souborového systému ext4 a dalších subsystému Linuxového jádra, které s ním souvisí. Pro vyhodnocení výkonu současné implementace adresářového indexu byla vytvořena sada testů. Na základě výsledků těchto testů bylo navrženo řešení, které bylo následně implementováno do Linuxového jádra. V závěru této práce naleznete vyhodnocení přínosu a porovnání výkonu nové implementace s dalšími souborovými systémy v Linuxu.
Online Deduplication for Btrfs
Křížek, Martin ; Michal, Bohumil (referee) ; Kašpárek, Tomáš (advisor)
Btrfs je copy-on-write linuxový souborový systém, který obsahuje vlastního správce oddílů a podporuje efektivní operace se snapshoty. Online deduplikace dat je metoda odstranění duplicitních bloků dat ještě předtím než jsou zapsány na disk. Tato funkcionalita šetří místo na uložišti avšak může v jistých případech znamenat pokles výkonu při zápisu. Hlavním využitím jsou soubory obrazů disků virtuálních strojů. Takové soubory obsahují z velké části stejná data (stejný operační systém) a tedy tyto části lze zapsat na disk pouze jednou. Tato diplomová práce se zabývá návrhem a implementací online deduplikace pro souborový systém Btrfs.
Generic BIOS Update Mechanism for Linux
Mariščák, Igor ; Šimek, Václav (referee) ; Kašpárek, Tomáš (advisor)
This work provides overview of creating of a simple driver for the BIOS flash memory by accessing the physical computer memory. Although, the BIOS is one of a system's core components, there is no standardized update mechanism approach. Purpose of thesis is to create module driver by taking advantage of existing interface subsystem MTD, to suggest and implement driver for one specific device to Linux kernel operating system. Also explains technique allowing write access to registers of the flash memory with utilization of configuration file.
Available Solutions for Server Clustering
Bílek, Václav ; Čejka, Rudolf (referee) ; Kašpárek, Tomáš (advisor)
The goal of this master thesis is to analyze Open Source resources for loadbalancing and high availability, with aim on areas of its typical usage. These areas are particularly solutions of network infrastructure (routers, loadbalancers), generally network and internet services and parallel filesystems. Next part of this thesis is analysis of design, implementation and plans of subsequent advancement of an fast growing Internet project. The effect of this growth is necessity of solving scalability on all levels. The last part is performance analysis of individual loadbalancing methods in the Linux Virtual Server project.
Advanced Tools for Performance Measurement
Smrček, Jaromír ; Gajda, Zbyšek (referee) ; Kašpárek, Tomáš (advisor)
This thesis presents the I/O layer of Linux kernel and shows various tools for tuning and optimization of its performance. Many tools are presented and their usage and outputs are studied. The thesis then focuses on the means of combining such tools to create more applicable methodology of system analysis and monitoring. The practical part consists of applying SystemTap scripts for blktrace subsystem and creating a fragmentation monitoring tool with graphical output.
Comparison of Systems for Monitoring of Computer Networks
Vozdecký, Lukáš ; Kašpárek, Tomáš (referee) ; Čejka, Rudolf (advisor)
This thesis is comparison of three open--source Linux/Unix network monitoring applications Nagios, Zabbix, Big Sister. Every application is described according to its basic fundamentals. The comparison is done through managing series of tests based on real environment experience. Solution to these problems and specific procedure differencies are described for each application.
RedirFS - Application on Directory Merging
Holášek, Petr ; Michal, Bohumil (referee) ; Kašpárek, Tomáš (advisor)
Main purpose of this work is to explore history and methods of directory unions, to make a proposal of design and finally to implement Linux kernel module that merges content of directories using RedirFS framework. We will discuss and solve related problems like namespace overlapping or underlying directories changes.
Remote Management of Unix Router with XMPP/Jabber Protocol
Bezdíček, Lukáš ; Matoušek, Petr (referee) ; Kašpárek, Tomáš (advisor)
This thesis concerns designing and implementing a modular client for XMPP/Jabber protocol intended for interpreting commands for the OpenWrt operating system. My work contains information about XMPP/Jabber protocol and OpenWrt operation system and describes the process of designing and implementing the client.

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