It's been my experience that the problem is not the large number of tapes a restore takes when not collocating, rather it's the large mount, unmount seek and rewind times associated with each tape mount that is the problem. If you have sub-second mount, unmount, seek and rewind times then there is not a large penalty to pay when not collocating. I use a Virtual Tape Library which is just an ATL emulation front end to a "disk only stgpool". I do not collocate and have no problem restoring large servers housing thousands of small files, the kind of environment that usually demands collocation. The question to consider is "what are the pros & cons to a large native disk pool vs. an appliance such as a VTL". I decided on a VTL to preserve LAN-free backup ability and compression.
Milton -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Spearman, Wayne Sent: Monday, December 05, 2005 3:34 PM To: [email protected] Subject: Disk Only backups We are planning to move a large number of our nodes to "disk only" backups and eliminate tape for them. The diskpools will be devtype=file. I struggle with whether to collocate these disk volumes or not and how large to make them. I've had some discussions with IBM, but would like to ask others to share their experiences with me. Any input would be welcome. Thanks, Wayne ----------------------------------------- This message and any included attachments are from NOVANT HEALTH INC. and are intended only for the addressee(s). The information contained herein may include trade secrets or privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you received this message in error, or have reason to believe you are not authorized to receive it, please promptly delete this message and notify the sender by e-mail. If you believe that any information contained in this message is disparaging or harassing on the basis of gender, race, age, disability, religion, or national origin, please contact Novant Health, Inc. at 1 -888-378-8250 or 1-800-350-0094 or forward the e-mail to [EMAIL PROTECTED] Thank you.
