I've built an incremental backup solution which uses RSYNC to backup a few of our servers. I'm using PHP to run through config files to get the information for each server that needs to be backed up. PHP then calls RSYNC to handle the remote backup of the servers, incrementally.
This works perfectly on all of our servers, and takes just a few minutes to finish....all except for one server. This server has a lot of data, and it seems that RSYNC just hangs on it. It takes over 3 days to do a single incremental backup. My guess is that it's stuck on building the file list.
When I run the below command on the folder I want to backup, here are the 'iused' results.
df -i folder/ 54176307
Is this simply too much data for RSYNC to handle? Should I be looking into another alternative? The backup server is currently running on version 3.0.8, however, the clients being backed up are all running RSYNC 2.6.9. Do you think upgrading everything to 3.0.8 would make a difference and reduce the 3 day backup time for this server?