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XMM-Newton Science Analysis System Page: 1
playback
June 28, 2006
Abstract
Play back commands applied to a data set
version 1.0 - 2000-10-05 add withscriptfile and scriptfile.
1 Instruments/Modes
Instrument Mode
n/a n/a
2 Use
pipeline processing no
interactive analysis yes
3 Description
When a SAS task manipulates a data set with write privileges, its action is recorded in three dierent
manners. They are:
process information: this logs the SAS task name, its command line, version, and SAS
release.
history information: this records the name of the SAS task and the date when the task was
applied to the data set.
dal trace: these log the internal state of the dal when a task was executed.
playback can be used to extract this information from a list of data sets (parameter sets). Optionally,
the output can be redirected to a script le, that can subsequently be executed to actually play back the
sequence of SAS tasks that were used to create and modify a data set (see 3.1).
By default playback only displays the content of the process information. Optionally, the informa-
tion in the history information and the dal trace can also be shown. (Parameters showhistory and
showdaltrace respectively.)
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3.1 Examples
In the following we use the data set test.ds created as follows:
dscreatedataset name='test.ds'
dsaddtable name='table' rows=10 set='test.ds
dssetattr to=test.ds%HELLO --type=string --value="hello ccb"
1. playback --sets=test.ds displays:
playback:- # --------------------------
playback:- # SAS commands from test.ds:
playback:- # --------------------------
playback:- dscreatedataset name='test.ds' # (daltools-0.27) [xmmsas_20001001_1900]
playback:- dsaddtable label='' name='table' position=-1 rows=10 set='test.ds' withlabel=no withposition=no # (daltools-0.27) [xmmsas_20001001_1900]
playback:- dssetattr label='' to='test.ds%HELLO' type='string' units='' value='hello ccb' # (daltools-0.27) [xmmsas_20001001_1900]
playback --sets=test.ds --showhistory=yes displays:
playback:- # --------------------------
playback:- # SAS commands from test.ds:
playback:- # --------------------------
playback:- dscreatedataset name='test.ds' # (daltools-0.27) [xmmsas_20001001_1900]
playback:- dsaddtable label='' name='table' position=-1 rows=10 set='test.ds' withlabel=no withposition=no # (daltools-0.27) [xmmsas_20001001_1900]
playback:- dssetattr label='' to='test.ds%HELLO' type='string' units='' value='hello ccb' # (daltools-0.27) [xmmsas_20001001_1900]
playback:- # -----------------------------
playback:- # History records from test.ds:
playback:- # -----------------------------
playback:- # Created by dscreatedataset (daltools-0.27) [xmmsas_20001001_1900] at 2
playback:- # 000-10-02T10:05:25.000
playback:- # Modified by dsaddtable (daltools-0.27) [xmmsas_20001001_1900] at 2000-
playback:- # 10-02T10:05:58.000
playback:- # Modified by dssetattr (daltools-0.27) [xmmsas_20001001_1900] at 2000-1
playback:- # 0-02T11:08:50.000
2. To extract the list of SAS tasks that were used to create test.ds type (for a Bourne-like Unix shell):
playback --sets=test.ds --withscriptfile=yes --scriptfile=myscript
that writes into myscript the fllowing:
# --------------------------
# SAS commands from test.ds:
# --------------------------
dscreatedataset name='test.ds' # (daltools-0.27) [xmmsas_20001001_1900]
dsaddtable label='' name='table' position=-1 rows=10 set='test.ds' withlabel=no withposition=no # (daltools-0.27) [xmmsas_20001001_1900]
dssetattr label='' to='test.ds%HELLO' type='string' units='' value='hello ccb' # (daltools-0.27) [xmmsas_20001001_1900]
4 Parameters
This section documents the parameters recognized by this task (if any).
Parameter Mand Type Default Constraints
sets no E set.ds
Data sets from which to play back commands.
showdaltrace no b no
Display DAL trace records?
showhistory no b no
Display HISTORY records?
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withscriptle no b yes
Write commands also to a script le?
scriptle no f playback.sh
Name of the script le
5 Errors
This section documents warnings and errors generated by this task (if any). Note that warnings and
errors can also be generated in the SAS infrastructure libraries, in which case they would not be docu-
mented here. Refer to the index of all errors and warnings available in the HTML version of the SAS
documentation.
None.
6 Input Files
1. Any data set.
7 Output Files
1.
8 Algorithm
foreach(set){
foreach(process){
write process info
}
if(showdaltrace){
foreach(dal trace record){
write trace record
}
}
if(showhistory){
foreach(history){
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write history info
}
}
9 Comments

References
xmmsas 20060628 1801-7.0.0