SAS 9.1.3 Intelligence Platform: System Administration Guide

Using Configuration Settings to Optimize Metadata Server Performance R Repairing Problematic Data Sets 107
Avoiding Changes to the Repository That Adversely Affect Performance
The SAS Metadata Server optimizes its performance by relying on the original
internal structure of repository data sets. Therefore, you should not use SAS options
that affect the internal structure of these data sets, because such changes will
adversely affect performance. For example, do not set the data set options COMPRESS
and REUSE to Yes in order to compress observations and to reuse compressed space in
compressed data sets. In addition, using a procedure like PROC SORT can cause
problems. The problems result from the procedure’s changing the order in which
observations are stored in the data sets.
Determining Whether the COMPRESS or REUSE Attribute Has Been Set
It is possible that the installer at your site set the COMPRESS and REUSE options
on your repository data sets when he or she set up your system. When the installer
creates your foundation repository by using SAS Management Console, he or she has
the chance to specify data set options such as COMPRESS=Yes and REUSE=Yes, and
may have done so in an attempt to conserve disk space. In addition, these options can
be set inadvertently if they are specified as global options in a system command line, a
configuration file, or an autoexec file when you start the metadata server or run the
%OMABAKUP macro.
To determine whether COMPRESS or REUSE has been set on a repository, run PROC
CONTENTS against the repository directory. For example, you might run this program:
libname reposdir ’C:\SAS\EntBIServer\Lev1\SASMain\MetadataServer\
MetadataRepositories\Foundation’;
proc contents data=reposdir._all_;
run;
The output of this procedure will contain a list of variables and attributes for each data
set processed. If the list for a data set indicates that the COMPRESS or REUSE option
has been set, you will know that the internal structure of that data set has been altered.
Repairing Problematic Data Sets
To repair repository data sets that have been compressed, perform these steps:
1 Create a temporary repository directory to hold the uncompressed data sets.
2 Use PROC COPY or a DATA step to create an uncompressed version of the data
sets in the temporary location. For example, you can use code similar to the
following:
/* set the correct system options for the SAS session and assign librefs
to the original and temporary repository directories */
options compress=no reuse=no;
libname reposdir ’C:\SAS\EntBIServer\Lev1\SASMain\MetadataServer\
MetadataRepositories\Foundation’;
libname tempdir ’C:\SAS\EntBIServer\Lev1\SASMain\MetadataServer\
MetadataRepositories\FoundationTemp’ compress=no;
/* list the contents of the repository directory */
proc contents data=reposdir._all_;
run;