One note to add: I have a private backup network: One VLAN for my production (Windows) servers and one VLAN for my Development (Unix, Sparc, Sun, etc) servers.
Will Tucker | Storage Administrator Enterprise Technology Services Manhattan Associates, Inc. Direct +1 678.597.6644 Phone +1 770.955.7070 Fax +1 814.295.9676 Mobile +1 770.490.5404 wtuc...@manh.com<mailto:wtuc...@manh.com> http://www.manh.com/ _____________________________________________ The Supply Chain People(r) Manhattan Associates From: Jeff Cleverley [mailto:jeff.clever...@avagotech.com] Sent: Tuesday, January 25, 2011 3:19 PM To: Will Tucker Subject: Re: [Veritas-bu] How Much Data Can Be Backed Up Will, Questions like this vary greatly based on many factors. In short, you're really the only one who can determine that. Here are some basic guidelines I use. 1. Most people probably use media servers to backup themselves. This keeps large amounts of data off the network. You need to figure out the maximum data transfer rate for your media server (system I/O), the maximum transfer rate of your source disks, and the maximum transfer rate of your tape drives. In this case, the slowest one wins and is the best case number you can use. You then figure out how much data you will backup for a full backup (worst case transfers), divide that by your best case transfer rate, and that will tell you how long it will take to do that backup. 2. For client backups to media or master servers over the network, you need to factor in the same things as above, but now the network traffic becomes another factor. If you flood the LAN and have to dial things back to keep other users happy, it will affect how much you can effectively backup. 3. Throttling the backups, locally or across the network, may need to be considered. If you find running an all-out full backup on a client drives it into the ground where users complain, you'll need to factor in slower times as you restrict throughput or look into things like a dedicated backup network and interface. 4. What is an acceptable backup window for your clients. If you have 12 hours to backup 10 TB you need to make sure each of the pieces are capable of performing at a high enough level. If it currently takes you 6 hours, you have room for more data. If you are already at 12 hours then you need to find out which piece isn't keeping up and decide if you can change it. As you can see, the number of tape drives or media servers may not be a factor. If you can write 80MB/s to a tape drive but your source disks are only putting out 30MB/s adding more tape drives or media servers will not help you at all. Do some testing of the individual piece involved in your backups and see where your weakest link is. You should be able to figure out where you are limited from there. Jeff On Tue, Jan 25, 2011 at 12:47 PM, Will Tucker <wtuc...@manh.com<mailto:wtuc...@manh.com>> wrote: All, How do you determine how much data that can be backed up in your environments? I have NetBackup 6.5.3 with 10 tape drives and 5 media servers in a Windows environment. Thank you. Will Tucker | Storage Administrator Enterprise Technology Services Manhattan Associates, Inc. Direct +1 678.597.6644 Phone +1 770.955.7070 Fax +1 814.295.9676 Mobile +1 770.490.5404 wtuc...@manh.com<mailto:wtuc...@manh.com> http://www.manh.com/ _____________________________________________ The Supply Chain People(r) Manhattan Associates From: Will Tucker Sent: Tuesday, January 25, 2011 2:45 PM To: VERITAS-BU@mailman.eng.auburn.edu<mailto:VERITAS-BU@mailman.eng.auburn.edu> Subject: Media Servers Per Tape Drive Ratio All, How do you determine how many media servers per tape drive in your environments? I have 10 LTO3 tape drives and have been using 2 media servers per tape drive. Thank you. Will Tucker | Storage Administrator Enterprise Technology Services Manhattan Associates, Inc. Direct +1 678.597.6644 Phone +1 770.955.7070 Fax +1 814.295.9676 Mobile +1 770.490.5404 wtuc...@manh.com<mailto:wtuc...@manh.com> http://www.manh.com/ _____________________________________________ The Supply Chain People(r) Manhattan Associates From: veritas-bu-boun...@mailman.eng.auburn.edu<mailto:veritas-bu-boun...@mailman.eng.auburn.edu> [mailto:veritas-bu-boun...@mailman.eng.auburn.edu<mailto:veritas-bu-boun...@mailman.eng.auburn.edu>] On Behalf Of WEAVER, Simon (external) Sent: Tuesday, January 25, 2011 1:55 PM To: VERITAS-BU@mailman.eng.auburn.edu<mailto:VERITAS-BU@mailman.eng.auburn.edu> Subject: [Veritas-bu] Size buffers / Performance Tune on Ex2k3 with LTO4 All Just a quick question, but I used some default NetBackup settings to tune Exchange backups and restores. If I move to a different library with LTO4 (rather than LTO3), do I need to reconfigure the settings? Windows 2003 SAN Media Exchange, with Master Win2k3 SP2 Regards Simon This email (including any attachments) may contain confidential and/or privileged information or information otherwise protected from disclosure. If you are not the intended recipient, please notify the sender immediately, do not copy this message or any attachments and do not use it for any purpose or disclose its content to any person, but delete this message and any attachments from your system. Astrium disclaims any and all liability if this email transmission was virus corrupted, altered or falsified. -o- Astrium Limited, Registered in England and Wales No. 2449259 Registered Office: Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2AS, England _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu<mailto:Veritas-bu@mailman.eng.auburn.edu> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu -- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611
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