Rman backup is too slow

Question

Hi
I have oracle database (11gR1) 64 bit installed on Windows 2003 R2 64 bit server. MY DB size is almost 152 GB and its running in archive log mode. When i run RMAN online backup , Its taking too much time almost it has taken 22 Hours and still its running , I am not sure why it is consuming this much time ..
I am using below RMAN script ...
run {
allocate channel ch1 type disk;
backup FILESPERSET 32
format 'F:\RMAN_BACKUP\%d_t%t_s%s_FULL' tag Full_DATABASE_07_july_13
(database)
CURRENT CONTROLFILE SPFILE;
SQL "alter system archive log current";
backup FILESPERSET 200
format 'F:\RMAN_BACKUP\ARC_%d_%s_%t'
(archivelog all);
release channel ch1;
Kindly help me and whats wrong in this please tell me . Also tell me if any other information needed ..
Thanks & Regards,
Vikash Jain

Answer 1

hi, Till now RMAN backup not completed for single time so i cant tell how long it takes.
I tried with parallelism 2 also but it is also not working.
CONFIGURE DEFAULT DEVICE TYPE TO disk;   
# backup goes to disk
CONFIGURE DEVICE TYPE disk PARALLELISM 2;
# three channels used in parallel
CONFIGURE CONTROLFILE AUTOBACKUP ON;     
#controlfile and spfile take backup automatically
CONFIGURE CHANNEL 1 DEVICE TYPE DISK FORMAT 'F:\RMAN_BACKUP\%d_t%t_s%s_FULL' MAXPIECESIZE 10G; # 1st channel 
CONFIGURE CHANNEL 2 DEVICE TYPE DISK FORMAT 'F:\RMAN_BACKUP\%d_t%t_s%s_FULL' MAXPIECESIZE 10G; # 2nd channel
run {
      allocate channel chnnel1 type disk;
    allocate channel chnnel2 type disk;
backup database tag Full_DB_090713_With_CH_02;
SQL "alter system archive log current";
    backup archivelog all format 'F:\RMAN_BACKUP\ARC_%d_%s_%t';
release channel chnnel1;
release channel chnnel2;
this also having below error ..
RMAN-03009: failure of backup command on chnnel1 channel at 07/12/2013 10:38:31
ORA-19502: write error on file "D:\APP\ADMINISTRATOR\PRODUCT\11.1.0\DB_1\DATABASE\86OEH1S5_1_1", block number 1476225 (block size=8192)
ORA-27072: File I/O error
OSD-04008: WriteFile() failure, unable to write to file
O/S-Error: (OS 112) There is not enough space on the disk.
channel chnnel1 disabled, job failed on it will be run on another channel
released channel: chnnel1
released channel: chnnel2
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on chnnel2 channel at 07/12/2013 10:42:08
ORA-19502: write error on file "D:\APP\ADMINISTRATOR\PRODUCT\11.1.0\DB_1\DATABASE\87OEHG94_1_1", block number 1476097 (block size=8192)
ORA-27072: File I/O error
OSD-04008: WriteFile() failure, unable to write to file
O/S-Error: (OS 112) There is not enough space on the disk.
I checked there is enough space on F drive but still its showing the above error , Also i cant see backup pieces in "F:\RMAN_BACKUP\" location ... I am sure whats wrong with the above script ...
Thanks & Regards,
Vikash Jain