Hi Guys,
So, bzip2 is a linear process and doesn't use multiple cores/processors. The replacement, pbzip2 does. It's in the default debian repositories. I think it should be what's used with i-mscp.
Adding 'pbzip2' to the required installs
changing line 323 of imscp.conf to be: CMD_BZIP = /usr/bin/pbzip2
changing line 127 of imscp-backup-all to be: "--use-compress-prog=".lc($main::imscpConfig{CMD_BZIP}),
sound good?