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# Tested on RHEL 6/gfs2 and RHEL 5/gfs
# GFS2 ------------------------------- # Showing journals of a gfs2 filesystem gfs2_tool journals /<mountpoint> journal2 - 128MB journal3 - 128MB journal1 - 128MB journal0 - 128MB 4 journal(s) found. # Adding journals to a gfs2 filesystem gfs2_jadd -j <journals_to_add> -J <journal_size_in_MB> /<mountpoint> # GFS -------------------------------- # Showing journals of a gfs filesystem is a little bit more complex # There's no "journals" option. We have to use "jindex" instead but output # is a bit cryptic; it shows the number of 64K segments gfs_tool jindex /<mountpoint> | egrep "Journal|segment" Journal 0: ji_nsegment = 2048 Journal 1: ji_nsegment = 2048 Journal 2: ji_nsegment = 2048 Journal 3: ji_nsegment = 2048 # In this case we have 2048 seg * 64K/seg = 128M # Adding journals to a gfs filesystem gfs_jadd -j <journals_to_add> -J <journal_size_in_MB> /<mountpoint> |