variable size of data sets

[bk53]

Hi,

is there a way to change the physical size of outputfiles?

I want to write a macro, which create testfiles with a determined size, the content does not matter.

Thanks

bk

[Jagadishkatam]

Could you please give more details, you want to know the size the datasets or change the size of the datasets

[bk53]

I want to Change the size of the datasets.

My main Problem is, that i want to create a macro witth the Parameter size and this macro create testfiles wich have this size, but i cant find a way to do this.

thanks

bk

[andreas_lds]

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@bk53 wrote:

I want to Change the size of the datasets.

My main Problem is, that i want to create a macro witth the Parameter size and this macro create testfiles wich have this size, but i cant find a way to do this.

thanks

bk

---

Size depends on the variables you create, the number of observations in the dataset and some other things like compression, page-size ... I should be possible to calculate the number of observations and variables to get a defined size. But i can't see a use-case requiring such files.

[bk53]

Thank you for your reply.

I need the data to test Transfer between to different Systems.

Is there a formula to calculate the size?

thanks

bk

[Jagadishkatam]

If it is about determining the size of the existing dataset in a library, we can know it by the below code.

The dataset sized will create a dataset where it will have name and dataset in library and size with other variables.

proc sql;
create table sized as select * from dictionary.tables where libname='name';
quit;

[bk53]

Thanks.

Here is an example what i need: a 3MB file, a 1GB file, a 912KB file.

I just want to create them, but the Content doesn't metter.

Thanks

bk

[ballardw]

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@bk53 wrote:

Thank you for your reply.

I need the data to test Transfer between to different Systems.

Is there a formula to calculate the size?

thanks

bk

---

First thing what are you using to measure "size"? Bytes, number of rows, number of characters, number of columns?

What type of file does this transfer need to use? Fixed column text files the size can be determined fairly easily but is dependent on how many characters per line.

Delimited text files such as CSV or Tab delimited would likely be not too difficult to create a fixed size but again content per line is important.

Binary files such as XLSX or structured files like XLM not so much. The XLSX can have a lot of overhead style information and the text format of XLM repeating variable names and types means that the actual names of variables affects total file size.

[andreas_lds]

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@bk53 wrote:

Thank you for your reply.

I need the data to test Transfer between to different Systems.

Is there a formula to calculate the size?

thanks

bk

---

Have you seen http://support.sas.com/kb/51/659.html?

[Astounding]

You could always use a little trial and error. For example:

data test1;
retain var1-var99 0;
do var100=0 to &nrecs;
output;
end;
run;

After a few tests you'll have a pretty good idea of how large &nrecs should be.

[bk53]

I used for nrecs values from 1 to 1000 and the size is every time 192kb.

Did i have to Change some Options?

[Astounding]

These values are way too small. 1 means create a data set with 2 records. Start with a million and go from there.