[DRBD-user] Read performance?

Greg Freemyer greg.freemyer at gmail.com
Wed May 30 17:04:07 CEST 2007

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

> Failing any of that, does anyone know a simple filesystem which can do what
> drbd does (raid1 over a network), but at the FS level? If not, I'm thinking
> of writing one using FUSE or something...

If you don't need realtime, rdiff-backup is designed to do nightly
backups of large data sets across a WAN.  It keeps a full copy of your
data offsite, plus deltas to get you back to older versions.

I'm currently backing up a 70GB dataset each night.  On days with no
activity it is taking less than an hour and I have a convoluted setup.
 (I first backup locally to encfs encrypted fs, then rsync the whole
backup repository to an offsite location.)

When there is data to send, I'm getting about 1GB/hr.  The rsync
algorithm ensures that only the deltas get sent.  (rdiff-backup uses
the rsync algorithm too.)

Greg Freemyer
The Norcross Group
Forensics for the 21st Century

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