How to export to multiple locations

Hi everyone,
I'm trying to do a full database export on a SunOS 5.8 server. The problem I often face is, most of the file systems on this server are 50 to 70% filled. So I'm not able to use a single file system to store all my dump files. So what I did was, I created multiple dump directories each representing a separate file system on this server. Later while doing export I specified the name of the dump directories prefixed to the dump file names as shown below.
expdp username/password
full=y
dumpfile=oradata1:dumpfile1.dmp,oradata2:dumpfile2,oradata3:dumpfile3
filesize=5GB
logfile=oralog.log
This worked fine for me. But I faced some problems which I will list below.
1> As mentioned above, I used filesize parameter. At one point of time, it was saying required space was not available (I hope the error number is 39095) and the export was failing. Then after increasing the filesize parameter considerably the problem got solved. I'm still not clear why the export failed even though there was enough space in the file system. I increased the filesize parameter after reading one of the post in a oracle forum. But they did not mention how it works. I want to know how oracle determines the minimum size for a dump file which was causing this problem.
2> I thought of creating a shell script to automate this backup process. I used the same export with some new additions as shown below.
expdp username/password
full=y
dumpfile=oradata1:file%U.dmp, oradata2:file%U.dmp, oradata3:file%U.dmp
filesize=5GB
parallel=5
logfile=oralog.log
My idea was that, if I specify %U, oracle will automatically generate new file names when the current one got exhausted. Again here, the problem I faced was it was creating only one dump file in each directory. Later I found that the number of files generated depends on the value I specified for the parallel parameter. But when the export was completed, even though I have specified 5 for parallel parameter it created two dump files in the first dump directory, one each in the remaining two dump directories. Again I have no idea why this happened. I haven't found any answer for this yet.
Please help me fix these issues, I have been trying my best but I'm not able to find any help for my oracle related queries. The only thing I see in google is oracle data pump documentation, please suggest me some helpful sites, forums for oracle which will help me. I rely on this forum a lot and it has really helped me a lot, thanx for all the Oracle gurus.

Let me try to explain what is probably happening.
I'm trying to do a full database export on a SunOS 5.8 server. The problem I often face is, most of the file systems on this server are 50 to 70% filled. So >I'm not able to use a single file system to store all my dump files. So what I did was, I created multiple dump directories each representing a separate file >system on this server. Later while doing export I specified the name of the dump directories prefixed to the dump file names as shown below.
expdp username/password
full=y
dumpfile=oradata1:dumpfile1.dmp,oradata2:dumpfile2,oradata3:dumpfile3
filesize=5GB
logfile=oralog.log
This worked fine for me. But I faced some problems which I will list below.
1> As mentioned above, I used filesize parameter. At one point of time, it was saying required space was not available (I hope the error number is 39095) >and the export was failing. Then after increasing the filesize parameter considerably the problem got solved. I'm still not clear why the export failed even >though there was enough space in the file system. I increased the filesize parameter after reading one of the post in a oracle forum. But they did not >mention how it works. I want to know how oracle determines the minimum size for a dump file which was causing this problem.My guess is that Data Pump started on 1 file system and filled the file to the 5GB max size. It then tried to create the next file in the next filesystem and could not fill it to 5GB so it failed.
When you specify multiple files, Data Pump starts on the first file, then when full, it opens the next file. (This is if parallel is 1) If parallel is larger, then it will open multiple files.
When you bumped the max filesize, the first file maybe took 10G and either the second file wasn't needed, or the amount of space for the second file was small enough to fit on the second file system.
>
2> I thought of creating a shell script to automate this backup process. I used the same export with some new additions as shown below.
expdp username/password
full=y
dumpfile=oradata1:file%U.dmp, oradata2:file%U.dmp, oradata3:file%U.dmp
filesize=5GB
parallel=5
logfile=oralog.logWhat happens here is that the first file will be opned on oradata1:file01.dmp the next file will be oradata2:file01.dmp, then oradata3:file01.dmp then back to the first directory with file02.dmp etc. It round-robins the filespecs and since they live in different directories, then it will round robin the directories also.
>
My idea was that, if I specify %U, oracle will automatically generate new file names when the current one got exhausted.This is true, but if the directory structure fills up, then an error is returned.
Again here, the problem I faced was it was creating only one dump file in each directory.It would have created more files in the directories if the job needed more. It fills a file and then creates the next, but in a round robin order
Later I found that the number of files generated depends on the value I specified for the parallel >parameter. But when the export was completed, even >though I have specified 5 for parallel parameter it created two dump files in the first dump directory, >one each in the remaining two dump directories. >Again I have no idea why this happened. I haven't found any answer for this yet.The job probably only went to a parallel 4 so it created 4 files. It doesn't create a file until it needs one.
>
Please help me fix these issues, I have been trying my best but I'm not able to find any help for my oracle related queries. The only thing I see in google is >oracle data pump documentation, please suggest me some helpful sites, forums for oracle which will help me. I rely on this forum a lot and it has really >helped me a lot, thanx for all the Oracle gurus.I'm not sure what issue you have. If you have limited disk space and you tell the Data Pump job to write it's dumpfile there, it will. If it runs out of room, the Data Pump job will throw a fatal error. During export, Data Pump doesn't know how much disk space it will need. The estimate phase is just for data, it does not estimate the metadata. This can be larger than the data, or it could be smaller. It depends on how full your tables are.
Hope this helps
Dean

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