I did some tests backing up/restoring a 4GB file with an AIX TSM client and TSM server and found the following:
Backup to diskpool unencrypted: 400 seconds Backup to diskpool encrypted: 600 seconds Restore unencrypted file from tape: 400 seconds Restore encrypted file from tape: 600 seconds. IBM was not able to answer whether or not these results were acceptable overhead for encryption since results are very dependent on configuration. Use this as an example. -----Original Message----- > Does encryption slow your backup down? Is there a large impact with > using encryption? "This e-mail and any attachments may contain confidential and privileged information. Any dissemination or use of the information by a person other than the intended recipient is unauthorized and may be illegal. If you are not the intended recipient, please notify the sender immediately by return e-mail, delete this e-mail and destroy any copies. Although this e-mail and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by the Board of Trade of the City of New York, Inc. or the New York Clearing Corporation for any loss or damage arising in any way from its use. Thank you."
