How much free space will be left after import ?

Question

Hallo. I need to replace all schemas on integration server using those on production server. I want to know how much free space will be left on /data at integration server after this kind of refresh. Both databases are Oracle 9 so I will use exp/imp. Here is how I do it. Could you check if I think good? On target server there is 72 GB free space on /data.
Filesystem Size Used Avail Capacity Mounted
/dev/vgsmxdata/lvsmxcopy 194.74G 122.56G 72.18G 63% /data
Overall size of schemas to be exported from SOURCE_DB is 150 GB. The same schemas on TARGET_DB takes 90GB. So difference is 60GB. Free space in datafiles in TARGET_DB is 30GB. Does it mean that in first place the free space in datafiles will be filled and after that datafiles would be extended? That would mean that a database would extend to 150GB and free space on /data would be 40 GB after refresh. Am I right?
SELECT 'TOTAL :'||SUM(ALLOCATED_MB),
'USED :'||SUM(USED_MB) USED,
'FREE :'||SUM(FREE_SPACE_MB)
FROM (SELECT SUBSTR (df.NAME, 1, 40) file_name, df.bytes / 1024 / 1024 allocated_mb,
((df.bytes / 1024 / 1024) - NVL (SUM (dfs.bytes) / 1024 / 1024, 0)) used_mb,
NVL (SUM (dfs.bytes) / 1024 / 1024, 0) free_space_mb
FROM v$datafile df, dba_free_space dfs
WHERE df.file# = dfs.file_id(+)
GROUP BY dfs.file_id, df.NAME, df.file#, df.bytes
ORDER BY file_name);
SOURCE_DB@Server1
TOTAL(MB) :170860.984375
USED(MB) :152777.859375
FREE(MB) :18083.125
TARGET_DB@Server2
TOTAL(MB) :121634,984375
USED(MB) :92853,109375
FREE(MB) :28781,875
Edited by: Przemek P on Oct 9, 2012 10:48 AM

Answer 1

Przemek P wrote:
Hallo. I need to replace all schemas from one server to another. I want to know how much free space will be left on /data after this kind of refresh. Both servers are Oracle 9 so I will use exp/imp. Here is how I do it. Could you check if I think good? On target server there is 72 GB free space on /data.
Filesystem Size Used Avail Capacity Mounted
/dev/vgsmxdata/lvsmxcopy 194.74G 122.56G 72.18G 63% /data
Overall size of schemas to be exported from SOURCE_DB is 150 GB. The same schemas on TARGET_DB takes 90GB. So difference is 60GB. Free space in datafiles in TARGET_DB is 30GB. Does it mean that in first place the free space in datafiles will be filled and after that datafiles would be extended? That would mean that a database would extend to 150GB and free space on /data would be 40 GB after refresh. Am I right?
yes