[lustre-discuss] ldiskfs patch rejected Rocky 8.6

[Jon Marshall]

Hi,

Me again! I now have a successful build of lustre server with ZFS support, thanks all for your help with this. I'm now stuck on getting ldiskfs support to work - specifically it requires the kernel-debuginfo and debugsource packages, which on Rocky 8.6, don't exist for the kernel I'm building against (4.18.0-372.9.1.el8.x86_64). I've installed the only ones that exist, for kernel 4.18.0-477.15.1.el8_8 and hackily symlinked it to the current kernel to get lustre to build against it, which it does, but then it fails on applying patches, which I suppose is not surprising. I assumed that having the e2fsprogs devel installed would do the trick but the build is specific in looking in /usr/src/kernel and /usr/src/debug/kernel, neither of which have it.

I'd like ldiskfs support as we currently run this fs on the MDT. However, we're only doing that because when we put the filesystem in place (which was a while ago) I'd read a fair amount warning against using ZFS on MDT due to potential performance issues. I've had a trawl through the mailing list and I can't see anyone having issues with newer ZFS versions so I guess my question is, is this still a thing? I've been planning to move to ZFS at some point anyway and it seems like this would be a good opportunity to do so but I thought I'd check and see if anyone had any advice.

Thanks in advance
Jon


Jon Marshall

High Performance Computing Specialist



IT and Scientific Computing Team



Cancer Research UK Cambridge Institute

Li Ka Shing Centre | Robinson Way | Cambridge | CB2 0RE

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