There are a few details missing to allow people to provide you with advice. How many files are you expecting to be in this 100TB of capacity? This really dictates what you are looking for. It could be full of 4K files which is a very different proposition to it being full of 100M files. What sort of media is this file system made up of? If you have 10’s millions of files on HDD then you are going to be wanting a separate metadata pool for CephFS on some much faster storage. What is the sort of use case that you are expecting for this storage? You say it is heavily used but what does that really mean? You have a 1000 HPC nodes all trying to access millions of 4K files? Or are you using it as a more general purpose file system for say home directories? Darren Soothill Looking for help with your Ceph cluster? Contact us at https://croit.io/ croit GmbH, Freseniusstr. 31h, 81247 Munich CEO: Martin Verges - VAT-ID: DE310638492 Com. register: Amtsgericht Munich HRB 231263 Web: https://croit.io/ | YouTube: https://goo.gl/PGE1Bx > On 15 Jan 2023, at 09:26, E Taka <0etaka0@xxxxxxxxx> wrote: > > Ceph 17.2.5: > > Hi, > > I'm looking for a reasonable and useful MDS configuration for a – in > future, no experiences until now – heavily used CephFS (~100TB). > For example, does it make a difference to increase the > mds_cache_memory_limit or the number of MDS instances? > > The hardware does not set any limits, I just want to know where the default > values can be optimized usefully before problem occur. > > Thanks, > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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