content of db and dbb files

[skjoex]

Hi,

i have two files with nodes and elements relative to these nodes. file with node has size 1MB and file with elements little over 1MB. to create finite model i read node file then element file. after solution phase and before enter postprocessor i issue

SAVE, MSU__2, DB,,MODEL
RESUME, MSU__2, DB,,,1

but i realized that this db file has over 1GB ! What is wrong ? files with nodes and elements have size 2MB. Creating this large db file is very time consumming, furthermore ansys first create dbb file of same size, and subsequent resume command is in this case very time consumming too. By the way, how to say ansys to not create dbb file ?
Fortunately, i was able to say ansys to not create rdb file by issuing RESCONTROL, NORESTART.

any suggestions about this topic ?

Regards,
lubo

 

[Stringmaker]

A 1 GB database is an absolutely monstrous database. It seems almost impossible that it comes from a .node and .elem file which are 1 MB each. Saving a file of this size will take a bit of time depending on your computers configuration. I do not know of anyway to force there not to be a *.dbb file written.

If you're really that concerned about space is sounds like you need to either:

a) buy a bigger hard drive
b) use a file compression program (winzip or gzip) to free up some space

 

[cbrn]

Hi,
for a totally different reason, I came recently to know that, in some cases, portions of the results stored in the .rst are "based" on companion data stored in the .db.
I know this is the case for any analysis involving CYCLIC, but other cases may exist.
If you are in one of these cases, your .db will include all this "companion" data because you are issueing the SAVE command AFTER the solution.
Could you try to save the db in a stage where you are absolutely sure it is still in "neutral" state?
Btw, it's absolutely normal that the .db is much bigger than the sum of .node and .elem; what is not normal is that you get a file 1000 times bigger...

Regards

 

[skjoex]

Hi,

I tried to save my finite model immediatelly after nodes and elements files have been read and initial geometric imperfection has been applied to nodes - the result is the same - db has over 1gb...

 

[skjoex]

...now i know the reason : i have defined several huge arrays like this

*DIM,results_1,ARR4, 70, 200, 28, 3

for capturing results in my parametric study via do-loops,
but in the first cycle they are empty and furthermore, when i issue

PARSAV,ALL,MSU__2__results, TXT

in the same time as SAVE this txt is 16kb large. i still dont understand...i know that binary files like db are bigger, but still it seems to me it is impossible...