 SASInstitute A00-280 : Clinical Trials Programming Using SAS 9 ExamExam Dumps Organized by Peter Smerg
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Exam Number : A00-280
Exam Name : Clinical Trials Programming Using SAS 9
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SASInstitute Programming answers
Getting begun with SAS/SHARE utility : commonly requested Questions
the following are solutions to questions that are often asked by way of new users of SAS/SHARE utility.
what's SAS/SHARE software? Why would i take advantage of it?
you utilize SAS/SHARE application when
a couple of person needs to update a SAS file (or a few SAS data) on the identical time.
clients wish to access SAS files on a far flung host without having to use a separate SAS/join far off login for every user.
the place can i examine SAS/SHARE application?
The e-book you might be practicing now applies to all working environments and explains what SAS/SHARE software is, describes the constituents of the utility, and comprises different fundamental fabric. This publication includes targeted reference material for PROC SERVER, PROC function, the LIBNAME remark, and the LOCK commentary.
also see Communications entry methods for SAS/join and SAS/SHARE utility for assistance about the use of a communications access formula to make a connection from a client session to a server session. This book also consists of guidelines to configure the entry formulation.
Do americans ought to use a new SAS manner to share their facts?
No. The clients who add and hold records continue to make use of the SAS procedures and windows that they already know: FSEDIT, PROC APPEND, FSVIEW, and so forth.
as an alternative of requiring users to exchange the SAS equipment they understand and use, SAS/SHARE utility takes capabilities of the SAS distinct Engine architecture (MEA) to allow these SAS equipment to access facts through a "site visitors cop" it really is formally known as a SAS server. A SAS server enables many users to read and replace the statistics in a single or more SAS information, all on the equal time via holding tune of locks on observations, catalog entries, and SAS info.
Does each and every grownup who's responsible for keeping information need to run his or her personal SAS server?
No. There are basically three roles that people expect with appreciate to SAS/SHARE utility. all of the roles will also be performed via the equal grownup, or one adult may additionally take two of the roles, or each and every role may be assigned to a separate group of americans. those roles are:
conclusion user
The end user reads, provides, and updates facts.
purposes developer
The functions developer writes SAS classes used by means of the end users.
server administrator
The server administrator makes bound SAS servers are available to the conclusion users.
it be no longer peculiar for an applications developer and a server administrator to be the equal adult. This happens when somebody who develops an application is responsible for the SAS server(s) used by way of that utility.
Three americans? i hope this application does not require the hassle of a big crew of americans.
No, three roles. We use the three roles to aid arrange the efforts that make possible shared preservation of information. In true life, the duties of the a considerable number of people concerned in a mission tend to overlap; many times the grownup who develops an software and continues a SAS server is the same particular person.
To support you maintain track of how duties continually are divided when multiple consumer needs to update a SAS file at the identical time, the remainder of the questions and solutions are divided in response to the roles described above:
Questions end clients ask
Questions software builders ask
Questions server administrators ask.
Questions requested by way of end users
How do I get began with SAS/SHARE software?
There is never lots you need to be aware of.
you utilize an utility that somebody else developed to study, add, or replace records in a single or extra SAS data. occasionally you'll find that an remark, a catalog entry, a file, or a library is locked by way of one more user. When that happens, a message appears to your reveal and also you cannot adjust the records. SAS/SHARE software keeps track of which users have which facts locked, so users cannot cause each and every other's adjustments to turn into mysteriously "lost."
How can i investigate no matter if i am gaining access to a SAS library via a SAS/SHARE server?
The SERVER= option is required in any LIBNAME remark (or, in SCL programs, any LIBNAME() characteristic) for a library to be accessed through a SAS/SHARE server.
When a library is accessed via a server, the counsel it is displayed with the aid of the LIBNAME commentary indicates you that the engine, which turned into used to access the library, is termed remote, and the physical name is a subdirectory accessed via the server SAS session.
Use the record choice in a LIBNAME observation to achieve tips about how a SAS library is defined to a SAS session, together with:
the name of the server by which the library is accessed
the libref used through the server to confer with the library (which may be the equal as or distinctive from the person's libref for the library)
the engine used within the server SAS session to read and write files within the library
the operating device and computer category on which the server is operating.
Questions requested by way of functions developers
How do I get all started with SAS/SHARE application?
study Getting began with SAS/SHARE utility. To be aware your functions in point of view, it is very beneficial to look how end clients journey locking conflicts and the way server administrators create and terminate SAS/SHARE servers.
also, study throughout the sample SCL software in Appendix 5 of this book. It illustrates a whole lot of programming suggestions for sharing facts amongst clients.
there's information in regards to the performance of your functions in Appendix four.
What do I have to do to a SAS library to have it accessed via a SAS/SHARE server?
The one component you need to do is add a SERVER= alternative to each and every LIBNAME remark that a person will use to entry the library.
You could are looking to pre-outline one or more libraries to a server. To try this, consist of a LIBNAME commentary for every library before getting into the PROC SERVER remark. This eliminates the requirement for a physical identify in each consumer's LIBNAME commentary that accesses any of those libraries. This can make it more straightforward to retain your utility.
For extra counsel about server libraries, see starting and Managing a SAS/SHARE Server. See The LIBNAME observation for reference information about server libraries.
Can a SAS/SHARE server entry a SAS library throughout a network?
yes, but you always don't need to prepare it that manner.
although a SAS/SHARE server isn't exactly like other file servers you can be well-known with, it continues to be a system that does a lot of disk I/O. it really is especially true as a result of a server does I/O to information on behalf of a large number of users. For that reason, you want the route size between the server SAS session and the actual disk to be as short as feasible. That skill storing information on the equal computing device as the server used to access that statistics, each time possible.
I've used servers before. A SAS/SHARE server is similar to the file servers we have on our network, isn't it?
not really. on the whole, file servers don't seem to be privy to the content of the files they manipulate, however a SAS/SHARE server enables several users to replace a single copy of a SAS file on the identical time.
SAS/SHARE software is tuned to manage locking conflicts inside SAS data, as an instance, two users attempting to replace the same remark of a SAS records file or two users trying to alter the equal entry in a SAS catalog. SAS/SHARE is not optimized to deliver the bulk facts transfer capabilities at which many file servers excel.
Can a server use a couple of communications access formula?
yes. A server administrator makes use of SAS options to do that.
if your software requires using a couple of communications access method, ask your server administrator to install the server for your software with the entry methods that you need. For extra counsel about entry strategies, see Specifying a Communications access formulation.
Do I must use a unique SAS/SHARE server for each and every file updated with the aid of the clients of my utility?
No. A server can share many information in the same SAS library in addition to sharing files in many different SAS libraries on the same time.
Is there a limit on what number of users or libraries a SAS/SHARE server can assist?
No. There aren't any quotas coded into the utility, and you don't deserve to use SAS alternatives to specify what number of clients or data a server will guide at one time.
besides the fact that children, a server is like any other process on a pc; as it is asked to do a fine deal of labor it takes longer to get that work finished. it's viable to place so a whole lot site visitors via a server that users whinge about response time. If any of your servers turn into that busy, you should accept as true with growing one or greater further servers and dividing the data among the servers.
See your server administrator about growing further servers.
Do I should ask my server administrator to beginning and stop my software's server day to day?
likely now not. Like different tactics on a laptop, SAS/SHARE servers can constantly run for lengthy durations of time with out intervention. once in a while periodic protection or backup undertaking requires strategies to be stopped for awhile and then restarted. Servers are under no circumstances proof against such interruptions.
Questions requested through Server directors
How do I get all started with SAS/SHARE application?
examine Getting all started with SAS/SHARE application, paying particular attention to when PROC SERVER is begun and stopped. You may additionally from time to time need to use PROC function, so be sure to as a minimum examine over these steps of the exercise.
A SAS/SHARE server is usually began when the working equipment has achieved its initialization, and it continues to run except the laptop is shut down or someone decides that the server should still be terminated. you should be regular with growing and managing those types of approaches. Of course, a server most effective does I/O or uses the processor while clients are having access to records via it; a server would not do a residual volume of labor whereas it is not doing work on behalf of different clients.
as a result of a server executes within a SAS session, you deserve to be aware of the way to invoke SAS application on each and every computing device on which a server will run.
I've used servers earlier than. A SAS/SHARE server is comparable to the file servers we have on our community, is rarely it?
no longer really. usually, file servers don't seem to be aware about the content material of the info they manage, however a SAS/SHARE server enables several clients to update a single copy of a SAS file at the identical time. also, SAS/SHARE servers immediately translate transmitted statistics when the customer host represents information otherwise from the server host.
Is being a SAS/SHARE server administrator a full-time job?
No! SAS/SHARE utility is designed to require no usual renovation or other administrative undertaking.
Can a server administrator control entry to a server?
yes. by way of default, SAS/SHARE application doesn't avoid who can connect with a server nor which info they can access, however that you could avoid entry to a server with the OAPW= and UAPW= options in the PROC SERVER commentary. The OAPW= choice specifies a password that the server administrator should give (the usage of the operate manner) to connect to the server. The UAPW= option specifies a password that the person must deliver within the LIBNAME commentary to set up communication with the server. Of course, your file system restricts a server's entry to info in accordance with the privileges of the information and the server's system. you could also installation a secured server. For more information, see Server protection.
Can a server administrator control which libraries may also be accessed via a server?
yes. For every server, you could steer clear of users from defining libraries to the server and restrict them to most effective those libraries that you just outline. To do that, use the NOALLOC option within the PROC SERVER remark. See Limiting Which Libraries the Server Can entry.
remember that passwords can also be used to prevent entry to particular person SAS files. See SAS Language Reference: Dictionary for extra tips about records set passwords.
How am i able to terminate a person's connection to a SAS/SHARE server?
First, make a decision even if you want the entry terminated automatically or as quickly because it is handy for the user.
The QUIESCE consumer command factors a user to be disconnected from a server when the consumer finishes the SAS application step or window at present being carried out. The cease user command instantly terminates a person's connection to a server and may trigger loss of updates that have not been communicated to the server.
In both circumstances, the person can't re-hook up with the server until a start person command is performed to provide the user permission to re-connect or unless the server is re-started. Servers do not bear in mind a listing of stopped clients when they're terminated and re-started.
See Quiescing a consumer's entry to a Server and Terminating a person's Connection to a Server.
How can i cease a SAS/SHARE server?
The QUIESCE SERVER command causes a server to stop when all clients have disconnected from the server. The cease SERVER command automatically stops the server and can trigger loss of updates that haven't been communicated to the server.
See Quiescing a Server and Stopping a Server.
Can a server use multiple communications access formula?
yes, if your host supports a couple of communications entry method. See Specifying a Communications access components for counsel in regards to the verbal exchange access strategies purchasable to your host.
seek advice from the Appendix "Configuration directions for SAS/SHARE application" on your setting up instructions for counsel about configuration requirements for the conversation access methods.
How can i verify when I deserve to create a second SAS/SHARE server?
You need to create a second server when the traffic on a server turns into so heavy that an software's efficiency is much less productive.
just as you periodically check the useful resource consumption of the different provider techniques on a computer, you should, every now and then, take a look at how a great deal CPU, I/O, and digital storage the servers are using. using working device administration equipment, you might also observe that a server is executing a extremely enormous variety of disk I/O operations or wants a very excessive percent of the processor. should you look at those situations, make sure to accept as true with relocating some of the work being performed by that server to a different, possibly new, server.
Distributing load among servers ought to be a cooperative effort between server directors and utility developers. SAS Institute elements a collection of autocall macros that assign materials to servers symbolically, which could make moving substances from one server to one other a lot easier. See the usage of SAS/SHARE Macros for Server access.
Copyright 1999 through SAS Institute Inc., Cary, NC, united states. All rights reserved.
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