Recovering DRBD+GFS after node failure

Posted on June 3, 2011 by James Thorne

Help! I’ve set up DRBD plus GFS2 like you said and now a node has failed! Where do you turn to? Fortunately, the DRBD user guide has a whole chapter on troubleshooting and error recovery. Here is a procedure that … Continue reading →

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Replicating block devices with DRBD

Posted on June 3, 2011 by James Thorne

Creating a hardware setup for a shared file system with concurrent access has long been the realm of expensive SAN/NAS solutions. Now, it is possible to do this for yourself with only two PCs (I was using two virtual machines … Continue reading →

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Uniting directories with Unison

Posted on June 1, 2011 by James Thorne

How do you synchronize two directories which are both changing? Rsync is ubiquitous and has been the staple of sysadmins for a long time. Unfortunately, it cannot differentiate between a file deletion on one node and a creation on another … Continue reading →

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