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310-200 - Sun Certified System Administrator for the Solaris 10 OS, Part I - Dump Information

Vendor : SUN
Exam Code : 310-200
Exam Name : Sun Certified System Administrator for the Solaris 10 OS, Part I
Questions and Answers : 354 Q & A
Updated On : April 17, 2019
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310-200 Questions and Answers

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310-200 Sun Certified System Administrator for the Solaris 10 OS, Part I

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310-200 exam Dumps Source : Sun Certified System Administrator for the Solaris 10 OS, Part I

Test Code : 310-200
Test Name : Sun Certified System Administrator for the Solaris 10 OS, Part I
Vendor Name : SUN
Q&A : 354 Real Questions

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SUN Sun Certified System Administrator

sun certified gadget Administrator: Job Description & requirements | killexams.com Real Questions and Pass4sure dumps

licensed Solaris gadget administrators are counsel know-how (IT) authorities who installation and keep community servers operating one of the crucial Solaris operating equipment, currently purchasable during the Oracle agency. they're continually employed through businesses and other agencies with laptop networks that use the enterprise's open supply utility items. As systems administrators, they may additionally additionally supervise different IT body of workers and reply to questions and preservation requests from office employees.

schooling Bachelor's diploma in assistance technology or computing device science counseled Job talents Troubleshooting, analytical thinking, multitasking, communication salary range (2016)* $87,four hundred to $104,762 with solar certified gadget Administrator credentials Job boom (2014-2024)** 8% for community and computing device systems directors

supply: *Payscale, **U.S. Bureau of Labor statistics

Required schooling

Most systems directors have completed a Bachelor of Science in guidance expertise, computer Science or a connected container. Core coursework usually includes subject matters in programming languages and procedures, networking and methods design. Solaris certifications are available during the Oracle enterprise in network, protection and methods administration. requirements encompass a passing rating on an examination, which candidates can prepare for by using enrolling in lessons at the Oracle Academy or an approved practising core, reviewing seminar programs and taking practice checks.

knowledge Required

techniques administrators are analytical thinkers who are in a position to troubleshoot issues for colossal companies of community device users. disturbing situations require clear, speedy pondering, and can involve working lengthy hours until the issue is mounted. The potential to multitask can also be beneficial when managing a couple of venture at a time. communication knowledge are key when working with nontechnical group of workers individuals.

profession and profits Outlook

The U.S. Bureau of Labor facts (BLS) expected that jobs for device administrators in generic will boost by using an ordinary tempo, eight% from 2014 to 2024. certified gadget administrators will delight in miraculous job possibilities, as businesses increasingly rely on full-time gurus to preserve their computer working techniques. in line with Payscale.com, certified programs administrators for Solaris operating techniques earned between $87,400 and $104,762 in may also 2016.


Hourly expense for Certification: sun certified equipment Administrator (SCSA) | killexams.com Real Questions and Pass4sure dumps

No outcomes found, are trying new keyword!Jobs document Disappoints: Payrolls brought most effective 20,000 Jobs in February Employers delivered 20,000 jobs to public and private non-farm payrolls remaining month, in line with this morning’s report from the Labor ...

sun licensed device Administrator for Solaris 10 analyze book (exams CX-310-200 & CX-310-202) | killexams.com Real Questions and Pass4sure dumps

software uptime is crucial to every administrator. The components which cause system downtime are sometimes dealt with via the operating equipment, but factors for software faults (e.g., application bugs, hardware faults, or human errors) aren't addressed with the aid of average gadget software. healing is left to people, who may also commonly compound the issue because of misdiagnosis or primary error. while availability ... [Show full abstract] concerns have historically been addressed with the aid of expensive excessive-availability clustering solutions, the increasing complexity of software stacks requires an answer for all methods. besides the challenges of managing availability of bigger degree software, the contemporary operating equipment itself is composed of many interdependent software entities. A failure in any one of those accessories regularly cascades, causing failures in other add-ons. a complex application mannequin with many interdependent facets makes diagnosing screw ups very challenging for system administrators. The common init.d script mechanisms for UNIX are most effective a weak reflection of the complex dependency relationships which exist on every gadget. We introduce the provider management Facility (SMF) as a comprehensive way to explain, execute, and manipulate software functions. SMF promotes the provider to a first-class operating device entity, devoid of requiring amendment of software binaries or alterations to the UNIX technique mannequin. It relieves the administrator from responsibilities of software failure detection and restart, and offers subtle prognosis equipment when automated restoration is unimaginable.

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Sun Certified System Administrator for the Solaris 10 OS, Part I

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The party has only just begun at this year's JavaOne, and to add to the festivities, last night JavaWorld celebrated those innovative technologies and tools that have influenced the Java platform. During the JavaWorld 2001 Editors' Choice Awards ceremony, held at the Ansel Adams Center in San Francisco, nine organizations and one author were honored for producing the best Java tools. All 30 finalists were also recognized at the ceremony for demonstrating the outstanding innovation currently emerging from the Java platform.

A tradition at JavaWorld since 1997, the Editors' Choice Awards (ECA) honors companies, organizations, and individuals for their efforts in driving Java forward. The event always begins with a selection process; this year, vendors, readers, and JavaWorld authors and editors nominated tools and technologies in the following 10 categories:

  • Best Java Virtual Machine
  • Best Java IDE
  • Best Java Performance Monitoring/Testing Tool
  • Best Java Class Library
  • Best Java Application Server
  • Best Java Device Application
  • Best Java-XML Technology
  • Best Java Book
  • Most Useful New or Revised Java API/Technology
  • Most Innovative Java Product
  • Any commercial, open source, or free Java-based technology shipped on or before March 31, 2001, could be nominated. Beta versions were not eligible.

    A panel of nine judges, all of them JavaWorld authors, voted in several rounds to narrow the more than 100 nominations to three finalists in each category. The panel then went through yet another round of voting to choose the winners. In making their final decisions, the judges thoroughly evaluated the features and functions of each technology or tool and its influence on Java.

    The several weeks of nominations and voting culminated last night at the Ansel Adams Center. JavaWorld columnist Frank Sommers, founder and CEO of AutoSpaces and an ECA judge, kicked off the event with an address on future Java-based technologies. Afterwards, JavaWorld editors presented the awards to each of the 10 winners. All winners and finalists received an Awards crystal acknowledging their accomplishment.

    Without further ado ... the winners of the JavaWorld 2001 Editors' Choice Awards:

    Best Java Virtual Machine: Java HotSpot Server VM 2.0, Solaris, Sun Microsystems

    Sun Microsystems' Java HotSpot VM architecture combines a high-tech memory model, garbage collector, and adaptive optimizer with a sophisticated object-oriented style. Featuring a uniform object model, rapid thread synchronization, and system-specific runtime routines generated at VM startup time, the Java HotSpot VM was designed to deliver top performance and reliability.

    "One should commend Sun for implementing VMs for many different platforms," notes Sommers. "The HotSpot engine provides very high performance and great stability."

    Updated from version 1.0.1, Java HotSpot Server VM 2.0 features improvements in runtime and garbage collection, as well as enhancements to the Java HotSpot Client VM and Server VM optimizations. New runtime capabilities include enhanced fatal-error reporting, improved support for debugging and profiling, and a unified source base. Version 2.0's garbage collectors feature larger heaps, a better soft reference policy, and support for larger applications.

    Both the Windows and Solaris editions of the HotSpot VM were chosen as finalists, with the Solaris edition taking first prize. "My first choice is the Solaris edition," continues Sommers, "because Java coupled with this operating system obtains one of the most reliable ways -- if not the most reliable one -- to deploy mission-critical enterprise applications."

    For more information on the Solaris version of Java HotSpot Server VM 2.0, along with the other winners mentioned here, visit the Resources section below.

    Other finalists:

  • Blackdown 1.3 Linux, Blackdown.org
  • Java HotSpot Server VM 2.0, Windows, Sun Microsystems
  • Best Java IDE: JBuilder 4 Enterprise, Borland Software

    Acknowledged in JavaWorld's last Readers' Choice Awards, Borland again accepted the award this year for Best Java IDE. Designed specifically to support the Java 2 Platform, Enterprise Edition (J2EE), JBuilder 4 Enterprise is a tool for creating business, database, and distributed applications. In addition to supporting Enterprise JavaBeans (EJB) 1.1-compliant development on the Windows, Solaris, and Linux platforms, version 4 features new visual two-way tools, designers, and wizards that speed the development and deployment of e-business applications.

    "Ever since version 3.5, JBuilder has been a fast and stable tool, and its free version is strong enough for its intended users," comments ECA judge Daniel Steinberg, director of Java offerings at Dim Sum Thinking. "As a Mac guy, I really like the way JBuilder runs on Mac OS X in the Borland demos."

    Developers can use JBuilder 4 Enterprise to build dynamic, data-driven Web apps with InternetBeans, JavaServer Pages (JSPs), and servlets. The tool is integrated with Borland Application Server and also supports BEA's WebLogic Server, this year's Best Application Server winner. Users can run and debug EJB and CORBA applications either locally or remotely and can deploy EJBs instantly without shutting down the application server.

    In May, Borland announced the release of JBuilder 5, which supports XML and IBM WebSphere.

    Other finalists:

  • Forte for Java 2.0, Sun Microsystems
  • VisualAge for Java 3.5, Enterprise Edition, IBM
  • Best Java Performance Monitoring/Testing Tool: JUnit 3.5, JUnit.org

    On their way to OOPSLA 97, Kent Beck, director of JUnit, and Erich Gamma, coauthor of Design Patterns (Addison-Wesley, 1995), wrote JUnit -- a regression-testing framework used by developers who implement unit tests. JUnit has always been free, but this year it debuted as an open source tool.

    "JUnit is simple for programmers to understand, use, and extend," says Beck. "And there are ports of the basic architecture to every imaginable programming language."

    "The bang-for-the-buck factor puts JUnit 3.5 ahead of the rest," says ECA judge Tony Sintes, senior principal consultant at BroadVision and JavaWorld's Q&A expert. "While JUnit is a bare-bones approach to software testing, it forces you to think and program with testing as a major component of development, not as an afterthought."

    JUnit.org has already released JUnit 3.6 and 3.7. For future releases, JUnit.org plans on improving the IDE integration and the user interface, says Beck. He also hopes that, in the true spirit of open source projects, more developers will contribute to JUnit's growth.

    "It's been three and a half years of lots of hard work and no money," said Beck after accepting the award last night. "And the years will continue."

    Other finalists:

  • Jtest 3.3, ParaSoft
  • Optimizeit 4.0, VMGear
  • Best Java Class Library: The Collections Framework, Sun Microsystems

    A unified architecture for representing and controlling collections, Sun's collections framework lets developers manipulate collections independently of their representation details.

    "It is extremely well designed, very well thought out, and extremely useful," says Sommers. "Given that it is shipping with the standard JDK classes, it has already become indispensable for all but the most trivial Java programs."

    The Collections Framework features high-performance data structures and algorithms, which diminish coding efforts and foster faster runtimes. Its common language provides interoperability among disparate APIs, and its standard interface for collections and algorithms encourages software reuse.

    The framework features general-purpose, legacy, wrapper, convenience, and abstract implementations as well as six collection interfaces and array utilities.

    "I'm really impressed with the Collections Framework," says ECA judge Humphrey Sheil, CEO of Teogas Systems. "It's extremely well designed and well integrated into the core JDK."

    Other finalists:

  • JClass Enterprise Suite 4.5.1, Sitraka Software
  • JGL 3.1, ObjectSpace
  • Best Java Application Server: BEA WebLogic Server 6.0, BEA Systems

    Previously honored by JavaWorld readers as Best Java Middleware Product, BEA's WebLogic Server snagged the award this year for Best Java Application Server.

    WebLogic was one of the first application servers ever launched; BEA introduced version 6.0 in December 2000. It includes an enterprise messaging platform, integrated XML support, EJB 2.0 with message-driven beans and container-managed persistence, and J2EE certification. BEA also added new management and usability features designed to enhance administrator and developer productivity. In addition, developers no longer need a separate Web server, as version 6.0 features a tightly integrated Web/application server architecture.

    "Few vendors implement application server clustering better than BEA," says ECA judge Govind Seshadri, an independent Java consultant. "If reliability and scalability are your top priorities, then WebLogic is a shoo-in."

    Looking ahead to the next release of WebLogic Server, BEA plans to support Web services and the latest J2EE technologies.

    Other finalists:

  • iPlanet Application Server 6.0, Enterprise Edition, iPlanet E-Commerce Solutions
  • WebSphere Application Server 3.5, Advanced Edition, IBM
  • Best Java Device Application: Java 2 Platform, Micro Edition (J2ME), Wireless Toolkit 1.0.1, Sun Microsystems

    The J2ME development environment specifically addresses the growing market of post-PC technologies, from smart cards to set-top boxes. With the J2ME Wireless Toolkit, Java developers receive an emulation environment, documentation, and examples to develop applications that comply with the Mobile Information Device Profile (MIDP). The toolkit is currently based on the J2ME Connected Limited Device Configuration and the MIDP technical specifications.

    "The emulators provided with the toolkit enable developers to test the appearance of their applications against the display of a Java-enabled phone and pager," says ECA judge Michael Cymerman, director of research and development at GroupServe. "All in all, this tool is an excellent starting point for developers looking to enter into J2ME coding."

    Version 1.0.1 provides two GUI-based development interfaces in addition to command-line support. Another benefit: developers are free to test their applications on any emulated target device.

    "The J2ME Wireless Toolkit simplifies the development and testing of MIDP-based applications," continues Cymerman. "The KToolbar enables developers to focus on writing Java code rather than the administration necessary to deploy MIDlets. By offering both hooks into other development tools and a solid build process based upon Ant from Jakarta, Sun has made this new Java profile extremely accessible to developers."

    Other finalists:

  • WebSphere Transcoding Publisher 3.5, IBM
  • Whiteboard SDK 1.0, Bluetooth Edition, Zucotto Wireless
  • Best Java-XML Technology: Java API for XML Processing (JAXP) 1.1, Sun Microsystems

    Using the Document Object Model (DOM), the Simple API for XML (SAX), and Extensible Stylesheet Language Transformation (XSLT), the JAXP API enables applications to parse and transform XML documents independent of any specific XML-processing implementation. Developers don't need to change any code to switch between XML processors, so it's easy for them to XML-enable their Java apps.

    "Given that XML is widely used as a data-encoding format and is the de facto way to expose data in Web-based systems, the ability to consider XML documents as objects in the Java environment is critical for Web-based applications," notes Sommers. "JAXP allows Java applications to integrate with data represented as XML documents."

    JAXP 1.1, Sun's latest release, supports SAX-2 and DOM Level 2, and also features an XSLT framework based on TrAX (Transformation API for XML). JAXP will be added to both the Java 2 Platform, Standard Edition 1.4 and Enterprise Edition 1.3.

    Other finalists:

  • Xalan-Java 1.2.2, the Apache XML Project
  • XML Parser for Java 3.1.1, IBM alphaWorks
  • Best Java Book: Thinking in Java, Second Edition, Bruce Eckel (Prentice Hall, 2000)

    Another repeat winner last night was Bruce Eckel for his book Thinking in Java, Second Edition;his first edition was recognized in JavaWorld's 1999 Readers' Choice Awards. For the second edition, Eckel updated the book to Java 2 standards. "I wanted to make it pure Java 2 from end to end," Eckel says. "At this point, we should forget about Java 1 because Java 2 was such an improvement."

    Thinking in Javais unique in that it is reproduced in its entirety on the Web. In addition, the book includes a CD that contains eight hours of lectures, slides, and exercises that teach the foundation of C syntax. Its purpose is not to teach the reader how to be a C++ programmer, but to provide enough background on C so that the reader can seamlessly move into Java.

    "Thinking in Java should be read by every Java programmer," says ECA judge Sommers. "Its main point is that Java is much more than a programming language, and that it therefore requires a new mode of thinking about code and a new mode of thinking about design."


    Supporting Multiple Page Sizes in the Solaris Operating System | killexams.com real questions and Pass4sure dumps

    Like this article? We recommend 

    After determining that our application warrants the use of large pages, we need to construct a strategy for determining what parts of our application to enhance to use large pages. For example, we should consider whether we should attempt to enable large pages for our target process's heap and stack. The trapstat utility provides a little information about the types of address space that incur TLB misses.

    The instruction TLB (iTLB) miss information is likely a result from the process's text and library text because instructions typically reside in these mappings. It is possible, however, for a program to execute code from other mappings; for example, the Java virtual machine compiles instructions on-the-fly into its heap and then executes from there. However, for the vast majority of applications, we can first guess that iTLB misses result from the text or library mappings.

    Data TLB misses are likely to occur from the program's writable segments (its heap, stack, data mapping, and read-only data within the text mapping).

    The default page size for the Solaris OS is 8 kilobytes on UltraSPARC and 4 kilobytes on Intel x86 microprocessors. Larger pages of 4 megabytes are used by the Solaris kernel for its instruction and data sections; however, user applications requiring larger pages must explicitly request them.

    The use of larger page sizes in the Solaris 2.6 OS through the Solaris 8 OS is only available through a special form of System V shared memory. To optimize database performance, we can use a form of shared memory called intimate shared memory (ISM). ISM is requested by the shmat(2) system call with the SHM_SHARE_MMU flag and is allocated as 4 megabyte pages, if possible. Databases such as Oracle, Informix, and Sybase request shared memory by using this flag and typically perform as much as 10 percent to 20 percent better as a result of a reduced TLB miss rate.

    The Solaris 9 OS introduces a generic framework for allowing user applications to request larger page sizes. At the same time, ISM was also enhanced to take advantage of the other supported large page sizes, for example, 64 kilobytes and 512 kilobytes. Unmodified applications can be directed to use larger page sizes by means of the ppgsz(1M) command and the libmpss.so library. Applications can also be customized to request larger page sizes by the memcntl(2) system call.

    The Solaris 9 OS large-page infrastructure allows larger pages to be requested for the mappings of /dev/zero, that is, for the heap, stack, and other anonymous mappings.

    Enabling Large Pages in the Solaris 9 OS

    The new framework, MPSS, provided in the Solaris 9 OS allows larger page sizes to be requested for user processes. The memcntl() system call specifies page-size advice for a given address range. A wrapper program, ppgsz, and an interposition library, libmpss.so, call memcntl() on behalf of the target process so that unmodified binaries can make use of larger page sizes.

    Advising Page-Size Preferences With ppgsz(1M)

    The ppgsz command is a wrapper that advises a preferred page size for a process's heap or stack of a target process. These page-size preferences are inherited across fork() but not across exec(). Thus, if the target program spawns (forks then execs) another program, page sizes are not inherited. If inheritance of page sizes is required, the libmpss.so library should be used instead.

    For example, to start a target process with 4 megabyte pages for its heap, we could use the ppgsz wrapper.

    sol9# ppgsz -o heap=4M ./testprog & sol9# pmap -sx ´pgrep testprog´ 2953: ./testprog Address Kbytes RSS Anon Locked Pgsz Mode Mapped File 00010000 8 8 - - 8K r-x-- dev:277,83 ino:114875 00020000 8 8 8 - 8K rwx-- dev:277,83 ino:114875 00022000 3960 3960 3960 - 8K rwx-- [ heap ] 00400000 131072 131072 131072 - 4M rwx-- [ heap ] FF280000 120 120 - - 8K r-x-- libc.so.1 FF29E000 136 128 - - - r-x-- libc.so.1 FF2C0000 72 72 - - 8K r-x-- libc.so.1 FF2D2000 192 192 - - - r-x-- libc.so.1 FF302000 112 112 - - 8K r-x-- libc.so.1 FF31E000 48 32 - - - r-x-- libc.so.1 FF33A000 24 24 24 - 8K rwx-- libc.so.1 FF340000 8 8 8 - 8K rwx-- libc.so.1 FF390000 8 8 - - 8K r-x-- libc_psr.so.1 FF3A0000 8 8 - - 8K r-x-- libdl.so.1 FF3B0000 8 8 8 - 8K rwx-- [ anon ] FF3C0000 152 152 - - 8K r-x-- ld.so.1 FF3F6000 8 8 8 - 8K rwx-- ld.so.1 FFBFA000 24 24 24 - 8K rwx-- [ stack ] -------- ------- ------- ------- ------- total Kb 135968 135944 135112 - Interposing Shared Libraries With libmpss.so

    The mpss.so shared object in /usr/lib provides a means by which the preferred stack or heap page size can be selectively configured for launched processes and their descendants. The library has an the advantage over the wrapper in that page sizes are inherited across exec(). To enable mpss.so, ensure that the following string is present in the environment (see ld.so.1(1)) along with one or more MPSS environment variables.

    sol9# LD_PRELOAD=$LD_PRELOAD:mpss.so.1

    Once preloaded, the mpss.so.1 shared object reads the following environment variables to determine preferred page size requirements and processes for which these requirements are specified.

    MPSSHEAP=size MPSSSTACK=size MPSSHEAP and MPSSSTACK specify the preferred page sizes for the heap and stack, respectively. The speci- fied page size(s) are applied to all created processes. MPSSCFGFILE=config-file config-file is a text file which contains one or more mpss configuration entries of the form: exec-name:heap-size:stack-size

    For example, the following commands enable 4-megabyte pages for the heap of all subsequently started processes.

    sol9# export LD_PRELOAD=$LD_PRELOAD:mpss.so.1 sol9# export MPSSHEAP=4M sol9# ./testprog

    See mpss.so.1(1) for all available configuration options.

    Compiling Your Application to Request Larger Page Sizes

    The Sun ForteTM 8 compilers provide options to cause the target application to request specific page sizes. The following options are supported for the compiler.

    Set Stack and Heap Page Size With -xpagesize=n

    (SPARC) Sets the preferred page size for the stack and the heap. The n value must be one of the following: 8K, 64K, 512K, 4M, 32M, 256M, 2G, 16G, or default.

    You must specify a valid page size for the Solaris OS on the target platform, as returned by getpagesize(3C). If you do not specify a valid page size, the request is silently ignored at run-time. The Solaris OS offers no guarantee that the page size request will be honored. You can use pmap(1) or meminfo(2) to determine page size of the target platform.

    The -xpagesize option has no effect unless you use it at compile time and at link time.

    NOTE

    This feature is not available on the Solaris 7 OS and the Solaris 8 OS. A program compiled with this option will not link on the Solaris 7 OS or the Solaris 8 OS.

    If you specify -xpagesize=default, the Solaris OS sets the page size. -xpagesize without an argument is the equivalent to -xpagesize=default.

    Compiling with this option has the same effect as setting the LD_PRELOAD environment variable to mpss.so.1 with the equivalent options, or running the ppgsz(1) command in the Solaris 9 software with the equivalent options before running the program. See the man pages for the Solaris 9 OS for details.

    This option is a macro for -xpagesize_heap and -xpagesize_stack. These two options accept the same arguments as -xpagesize: 8K, 64K, 512K, 4M, 32M, 256M, 2G, 16G, or default. You can set them both with the same value by specifying -xpagesize or you can specify them individually with different values.

    Set Heap Page Size in Memory With -xpagesize_heap=n

    (SPARC) Sets the page size in memory for the heap. The n value can be 8K, 64K, 512K, 4M, 32M, 256M, 2G, 16G, or default. You must specify a valid page size for the Solaris OS on the target platform, as returned by getpagesize(3C). If you do not specify a valid page size, the request is silently ignored at run time.

    You can use pmap(1) or meminfo(2) to determine page size at the target platform. If you specify -xpagesize_heap=default, the Solaris OS sets the page size. -xpagesize_heap without an argument is the equivalent to -xpagesize_heap=default.

    Compiling with this option has the same effect as setting the LD_PRELOAD environment variable to mpss.so.1 with the equivalent options, or running the ppgsz(1) command in the Solaris 9 software with the equivalent options before running the program. See the man pages for the Solaris 9 OS for details.

    NOTE

    This feature is not available on the Solaris 7 OS and the Solaris 8 OS. A program compiled with this option will not link on the Solaris 7 OS or the Solaris 8 OS.

    Set Stack Page Size in Memory With -xpagesize_stack=n

    (SPARC) Set the page size in memory for the stack. n can be 8K, 64K, 512K, 4M, 32M, 256M, 2G, 16G, or default. You must specify a valid page size for the Solaris OS on the target platform, as returned by getpagesize(3C). If you do not specify a valid page size, the request is silently ignored at run-time. You can use pmap(1) or meminfo(2) to determine page size at the target platform.

    If you specify -xpagesize_stack=default, the Solaris OS sets the page size. -xpagesize_stack without an argument is the equivalent to -xpagesize_stack=default.

    Compiling with this option has the same effect as setting the LD_PRELOAD environment variable to mpss.so.1 with the equivalent options, or running the Solaris 9 command ppgsz(1) with the equivalent options before running the program. See the man pages for the Solaris 9 OS for details.

    NOTE

    This feature is not available on the Solaris 7 OS and the Solaris 8 OS. A program compiled with this option will not link on the Solaris 7 OS or the Solaris 8 OS.

    Enhancing an Application to Request Larger Page Sizes

    The memcntl(3C) interface has been enhanced to allow page size requests to be made on behalf of a process. Thus, an application can automatically request larger page sizes when appropriate. Such an application wanting to request a larger page size should do so by using the existing memcntl() interface.

    int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg,int attr, int mask);

    With the cmd argument, we can now specify a new control operation, MC_HAT_ADVISE, for page-size operations. When the cmd argument is set to MC_HAT_ADVISE, the arg argument is interpreted as a pointer to a new structure, as shown below. Currently, only three commands are supported; each command sets a preferred page size. mha_flags must always be set to zero. It is reserved for future use. Only one command can be specified at a time.

    struct memcntl mha{ uint_t mha_cmd; /* command(s) */ uint_t mha_flags; /* flags */ size_t mha_pagesize; };

    If mha_cmd is set to MHA_MAPSIZE_VA, we apply the set preferred page-size operation to the address range (addr, addr + len). mha_pagesize must be a supported page size, as returned by getpagesizes(), or zero to let the system select the page size. The address and size of the range must be aligned to the new preferred page size. The access protections within new page-size regions contained in the range must be the same or the operation will fail. If there are holes in the address range or if the mapping is mapped with MAP_NORESERVE, the operation will fail. The address range can be contained inside a larger mapping or can span many mappings of varying sizes.

    The memcntl() interface promotes or demotes the preferred page sizes for any MAP_PRIVATE /dev/zero mappings, provided that the constraints mentioned above are met. Two special objects in the user address space require special handling: the process's heap and the primary thread stack (not the stack for additional threads).

    The heap consists of the last .bss adjacent to the brk area and the brk area itself. The following figure illustrates the mapping procedure.

    Figure 3FIGURE 3 Process Address Space Mappings

    For these two cases we have separate commands.

    MHA_MAPSIZE_STACK /* token for processes main stack */ MHA_MAPSIZE_BSSBRK /* token heap */

    When MHA_MAPSIZE_STACK and MHA_MAPSIZE_BSSBRK are used, mha_pagesize must be a supported page size, as returned by getpagesizes(3C), or zero to let the system select the page size. The operation is then applied to the entire existing stack or heap mappings. The advice is then used for future page allocations. These commands for changing the preferred page size for stack or heap may first adjust the existing range in accordance with the new page size. This could involve creating new segments to pad out the base and length of the existing range to the new, preferred, page-size alignment.

    Applications need to know what to align their memory requests on to attain maximum performance (for example, when using mmap() for creating new mappings) and to avoid misaligned mprotect(), munmap(), and mmap() requests that could result in page demotion, which is when larger pages are broken up into smaller pages.

    Most applications that use mmap() pass in NULL for its addr argument to let the OS manage its address space. If applications also want to use large pages with memcntl(), they should suggest to the OS that it specify, by means of a new flag, MAP_ALIGN, the minimum page size alignment desired. If specified, mmap() interprets the addr argument only as the required minimum alignment and is free to find a hole in the user address space that satisfies the minimum alignment specified in the addr argument. The alignment must be a power of two multiple of PAGESIZE, or zero to let the system choose the alignment. If MAP_ALIGN is specified along with MAP_FIXED, the request will fail. If the alignment request cannot be satisfied, mmap() will also fail.

    For reference, we provide the following example. This code fragment sets the page size for the program's heap to 4 megabytes. Note the use of memalign to align the request on a 4-megabyte boundary. Because the heap starts on a boundary that is not 4-megabyte aligned, the first few megabytes of the heap can reside on 8-kilobyte pages. If the performance-sensitive data structures reside within this area, the program might not realize the full benefits of a larger page size. By allocating a 4-megabyte aligned area, we increase the chance that the subsequent virtual addresses allocated will land on a large page.

    #include <sys/types.h> #include <sys/mman.h> #include <stdlib.h> #define MEGABYTE ((size_t)(1024 * 1024)) #define FOUR_MEGABYTE ((size_t)4 * MEGABYTE) int main(int argc, char *argv[]) { struct memcntl_mha mha; char *my_memory; /* Set pagesize to 4MB for heap */ mha.mha_cmd = MHA_MAPSIZE_BSSBRK; mha.mha_flags = 0; mha.mha_pagesize = FOUR_MEGABYTE; memcntl(NULL, 0, MC_HAT_ADVISE, (char *)&mha, 0, 0); /* Ensure user memory starts on first large page */ my_memory = (char *)memalign(FOUR_MEGABYTE, (size_t)100 * MEGABYTE); Determining Whether Your UltraSPARC CPU Model Works Well With Large Pages

    The TLB configurations are quite different across versions of UltraSPARC processors, but they share a few items in common. UltraSPARC I through IV supports four page sizes: 8 kilobytes, 64 kilobytes, 512 kilobytes, and 4 megabytes. In addition, there are separate TLBs for the instruction and data paths.

    UltraSPARC I and II

    The UltraSPARC I and II microprocessors (143 megahertz–480 megahertz) have two TLBs, one for the instruction path and one for the data path. Each TLB is a 64-entry, fully associative TLB that supports all four page sizes. User applications can use any of the four page sizes.

    750 Megahertz UltraSPARC III

    The 750 megahertz UltraSPARC III microprocessor has four TLBs: two for instruction and two for data. The instruction TLBs are implemented as a 16-entry, fully associative TLB that supports all four page sizes and a larger 128-entry TLB that supports only 8 kilobyte entries. The data TLBs are implemented as a 16-entry, fully associative TLB that supports all four page sizes and a larger 512-entry, two-way set associative TLB that supports only 8 kilobyte entries.

    The 16-entry dTLB has nine locked entries, which are locked by software for the Solaris kernel, leaving only seven slots for large page sizes. Thus, use of large pages is typically not beneficial on 750 megahertz UltraSPARC III systems.

    900 Megahertz+ UltraSPARC III

    The 900 megahertz onwards UltraSPARC III microprocessors have five TLBs: two for instruction and three for data. The instruction TLBs are configured as a 16-entry, fully associative TLB that supports all four page sizes and a larger 128-entry TLB that supports only 8 kilobyte entries. The data TLBs are configured as a 16-entry, fully associative TLB that supports all four page sizes and two larger 512-entry, two-way set associative TLBs that support one page size per process. The increased size of the data TLBs on 900 megahertz UltraSPARC III provides a large TLB spread (2 gigabytes when 4 megabyte pages are used) and typically increases performance significantly for large memory applications.

    The large data TLBs are configured automatically in accordance with the most common page sizes in a process's address space. A process using one large page size in addition to the base page size (8 kilobytes) will have one of its large TLBs automatically programmed to enable the large page size when eight or more pages are using the larger page size within the process. It is assumed that the smaller TLB is available if there are fewer than eight pages.

    Because the large TLBs support all four page sizes, large pages can be used effectively on UltraSPARC III. However, because the large TLBs can be configured for only one page size at a time per process, only two page sizes should be used concurrently. One of those page sizes should be the system's base page size (8 kilobytes) for mappings not using large pages—for example, the program text or libraries. The other larger page size is available for the remainder of the mappings. The most common selections for page sizes are 8 kilobytes and 4 megabytes, providing the greatest TLB spread for the large TLB.


    IBM continues push for Sun, but will the deal kill Solaris? | killexams.com real questions and Pass4sure dumps

    The high-stakes, but still under-the covers battle by IBM to take over Sun Microsystems is still in play, but IBM may be rethinking what it is willing to pay for the enterprise vendor.

    The Wall Street Journal, citing unnamed sources, reported today that IBM has dropped its offer to $9 to $10 a share, below its previously discussed price of $10 to $11.

    [ Special report: IBM in talks to buy Sun. ]

    What may be affecting IBM's offer is the potential delay due to regulatory oversight that the deal may bring.

    If IBM takes control of Sun, it also gains much of the Unix server market. IBM has more than a 37 percent share of Unix servers, and Sun, at No. 2, has just over 28 percent of the market, according to IDC.

    Unix servers are heavily used in the high end of the market, where IBM is already strong, thanks to its mainframe business, and that is just one area that could prompt antitrust regulators to examine this deal.

    The decision will also have major implication for users. Both companies have been in a lock-down about what a merger might mean and what technologies might live and die, but a merger could mean bad news for Sun's Solaris operating system, according to Paul Otellini, the president and CEO of Intel.

    At a recent company question-and-answer session, a transcript of which was filed with the SEC, Otellini warned that Solaris and Sparc are "likely to see EOLs over time through the IBM acquisition," he said. EOLs stands for end of life.

    Otellini said he saw no strategic reason for IBM to maintain Solaris and its Sparc processors "except to attempt to convert the very large Sun Sparc Solaris base to power" IBM. "I think that would be their most likely strategy as part of this," he said.

    Intel has reason to be concerned about Solaris -- the company has a lot invested in the operating systems, said Herb Hinstroff, Sun's director of datacenter software business management.

    Intel has "very large teams" that "are spending a whole lot of energy on Solaris," Hinstroff said in an interview this week. Intel is the No. 2 contributor -- after Sun itself -- to the Solaris code base, he said.

    Hinstroff noted that during the same session, Otellini also indicated that he wanted to see Sun remain independent. Otellini's transcribed words on that point: "I'd rather have Sun be independent I guess."

    This story, "IBM continues push for Sun, but will the deal kill Solaris?" was originally published by Computerworld.



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    SUN 310-200 Exam (Sun Certified System Administrator for the Solaris 10 OS, Part I) Detailed Information



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