[ale] Backup frequency question

[Jim Kinney]

Drbd is below file locking. It replaces the rsync process entirely. The
samba server is set to master, a spare is set to slave, a second spare is
setup offsite as slave. Writes are nearly concurrant. Reads are only from
the master. Offsite will be slow but most md practice software is write
seldom/read often. If samba dies, heartbeat can make spare become samba
master. This does require compiling a kernel module. Über kewl tech!

Can also be done with GFS and moosefs. GFS is in stock RHEL kernels. DRBD is
an add on. Slated for general use in RHEL 6.

On Apr 13, 2010 5:15 PM, "William Fragakis" <william at fragakis.com> wrote:

Jim,
The db can be run from a samba server. I have a test bed at home of the
database and I run the Windows kvm using a samba directory for the
storage - idea being that I can download the nightly offsite backups so
worst comes to worst, I can replicate the office environment here (I
really am paranoid about sprinklers, power surges and about anything
else that might affect the family livelihood).

I guess the issue would be the overhead of the db running off a samba
share which is running drbd (very cool idea, btw). Given desktop level
servers - dual/quad core athlons, etc. - is this a reasonable idea or
should I just reach deep in my pocket and license a replication server?

Also, does DRBD get around the file lock issue that prevents rsync from
playing well. I would assume it does since it operates at block level
but I'd hate to assume too much.

thanks.
William


On Tue, 2010-04-13 at 13:04 -0400, Jim Kinney wrote:
>
>
> On Tue, Apr 13, 2010 at 12:50 PM, Will...

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