[mythtv-users] The purpose of a Secondary Backend is... (is this really OT? I'm not sure)

Sam Hooker mythtv at noiseplant.com
Fri Jun 20 13:50:21 UTC 2008


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| One caveat though: if the secondary peer is disconnected long enough,
| the primary will run out of auxiliary storage and it will then be
| necessary to sync the entire partition when the secondary is
| reconnected. My most recent experience with this was a 70GB partition
| that literally took all day to sync over a GigE link. For this reason, I
| have my doubts that this use of heartbeat/DRBD is a good one.

Yeah, I'd imagine that a number of factors (how active your DB is, how
often mysqld is flushing to disk) can make its on-disk storage a moving
target for DRBD to synchronize. That's one of the reasons I thought
MySQL replication (with just DRBD for the recordings -- no Heartbeat)
would be the way to go. Then, you could just write a script on the
portable machine to mount the disk and start myth*end.


Cheers,

- -sth

sam hooker|mythtv at noiseplant.com|http://www.noiseplant.com


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