Re: [BackupPC-users] Backing up little by little or throttling the backu

Subject:

Re: [BackupPC-users] Backing up little by little or throttling the backup?

From:

Timothy J Massey <tmassey AT obscorp DOT com>

To:

"General list for user discussion, questions and support" <backuppc-users AT lists.sourceforge DOT net>

Date:

Tue, 12 Apr 2011 22:46:39 -0400

Timothy J Massey <tmassey AT obscorp DOT com> wrote on 04/12/2011 10:13:11 PM: > But give it a try first: unless that production server is a 600MHz > machine with 512MB RAM and a single SATA spindle, you will most > likely be fine (and if you *are* running like that, well, you have > other problems! :) ). (Actually, I have one client with servers > that are dual-processor 600MHz with 1GB RAM that I back up during > the day and the users at this location almost *never* notice.)

To clarify and expand this: they are IBM Netfinity 5600 servers. 2 x 600MHz Intel P3 processors, 1GB RAM, and 6 x 18GB SCSI-160 10,000 RPM drives in a RAID 5 array with an IBM ServeRAID hardware RAID controller. The systems are old and (processor) slow, but the disk performance is really pretty good, even today: it'll easily saturate GigE.

My point for this: CPU power matters little on the client side. RAM matters, but only once you have enough: depending on the number of files, the amount of RAM you truly need is literally in the hundreds of megabytes. What *really* matters is I/O and network throughput--and on any halfway-decent server with multiple high-RPM hard drives, you will be limited by network bandwidth more than anything else.

Timothy J. Massey


Out of the Box Solutions, Inc. Creative IT Solutions Made Simple! http://www.OutOfTheBoxSolutions.com tmassey AT obscorp DOT com		22108 Harper Ave. St. Clair Shores, MI 48080 Office: (800)750-4OBS (4627) Cell: (586)945-8796

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