iTunes could not connect to the iTunes Music Store
Some help here on why iTunes sometimes cannot connect to the iTunes Music Store. In this case with a MacBook…
Some help here on why iTunes sometimes cannot connect to the iTunes Music Store. In this case with a MacBook…
UCARP allows a couple of hosts to share common virtual IP addresses in order to provide automatic failover.
Each device (DRBD provides more than one of these devices) has a state, which can be ‘primary’ or ’secondary’. On the node with the primary device the application is supposed to run and to access the device (/dev/drbdX). Every write is sent to the local ‘lower level block device’ and to the node with the device in ’secondary’ state. The secondary device simply writes the data to its lower level block device. Reads are always carried out locally.
DRBD is a block device which is designed to build high availability clusters. This is done by mirroring a whole block device via (a dedicated) network. You could see it as a network raid-1.
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