ORA-27028、ORA-19511session has exceeded Networker server's parallelism
RMAN-03009: failure of backup command on c1 channel at 02/08/2015 22:34:56
ORA-19506: failed to create sequential file, name="FULL_TETRIX21_2173319909_08022015_117_871165851", parms=""
ORA-27028: skgfqcre: sbtbackup returned error
ORA-19511: Error received from media manager layer, error text:
current save session has exceeded Networker server's parallelism (0:5:2)
channel c1 disabled, job failed on it will be run on another channel
channel c2: finished piece 1 at 08/02/2015 22:44:22
piece handle=FULL_TETRIX21_2173319909_08022015_115_871164337 tag=BACKUP FULL+ARCHIVE DB WEEKLY comment=API Version 2.0,MMS Version 1.6.0.0
channel c2: backup set complete, elapsed time: 00:38:45
Changing Parallelism
A NetWorker server can back up files from many clients in parallel and can multiplex the files onto the same backup volume. This feature supplies a steady stream of files to the server, enabling the backup devices to operate efficiently. Use the Parallelism field in the Server window to optimize the efficiency of your server by controlling the number of clients that back up their files at any one time.
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Note: If you have purchased the TurboPak option, the maximum value for parallelism is 64; if you have not, the maximum value is 16. |
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Tip: If the server takes too long to back up all the clients, increase the parallelism. If the server is so busy backing up clients it is not available for any other tasks, decrease the parallelism. If the server runs out of swap space or memory, decrease the parallelism. |
To change the number of clients that can simultaneously back up their files to the NetWorker server, follow these steps:
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Open the Server window by selecting “Server Setup” from the Server pulldown menu.
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Select the Parallelism sliding bar and move it to the right or left to display the value you want, or enter the value in the field.
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Click the Apply button.
When one client finishes a backup, another client can start a backup. However, the number of clients allowed to back up at one time cannot exceed the parallelism setting. Presume a case in which there are eight NetWorker client and one server, and parallelism is set to four. In this case, after the first client finishes a backup, the fifth client will start, so that a total of four clients are backing up at one time. That is, any four clients may back up at any one time.
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Tip: To turn off the parallelism so that only one client can back up to the server at a time, set the Parallelism value to one. |
Refer to：http://techpubs.sgi.com/library/manuals/1000/007-1458-030/sgi_html/ch06.html
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