[DRBD-user] do I really need heartbeat for DRBD?

Dominik Klein dk at in-telegence.net
Tue Dec 18 08:07:30 CET 2007

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

> No, it's not data backup. RAID-1 is essentially not backup ;)
> Backup will be done somewhere else.
> Let's say we have two datacenters and two SAN machines there. Data is 
> written to and read only in datacenter_1; at the same time, everything 
> is replicated to a SAN in datacenter_2.
> It's some sort of assurance that when the datacenter_1 burns down to 
> ground or gets flooded, it shouldn't take longer than a few hours to 
> start all the services again in datacenter_2. It's much faster that way 
> than having to restore the last backups from tapes, decompress, write 
> where it belongs etc.

Still, this will work fine with drbd and w/o heartbeat.


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