When I set up this blog four and a half years ago, the performance of some of the journaled filesystems that did not originate from Linux, like JFS and XFS, were better than the native filesystems, notably ext3, which was really a journaled version of ext2. So the blog, for a number of years, has run off JFS, which had its origins in IBM’s flavor of Unix, AIX.
But from most benchmarks I’ve been able to find, and my own testing, ext4 is better than either JFS or XFS in terms of performance. The blog is running on a very old filesystem, and it’s time to make the switch. The defrag we’ll get from the switch alone should boost performance, even absent the filesystem switch.
I estimate the blog should not be down more than an hour sometime either after 1AM Saturday morning or 1AM Sunday morning. One of the great things about being linked by Instapundit is it gives me a great opportunity to examine the server under a heavy load, and I’ve come to the conclusion that the filesystem we’re using is both badly fragmented, and using a slower journaled filesystem than we could be using.