If you *really* want a block device on a client that resides in Lustre you *could* create a file in Lustre and then make that file a loopback device with losetup. Of course, your mileage will vary *a lot* based on use case, access, underlying LFS configuration.
dd if=/dev/zero of=/my_lustre_mountpoint/some_subdir/big_raw_file bs=1048576 count=100000 losetup -f /my_lustre_mountpoint/some_subdir/big_raw_file *assuming loop0 is created* some_fun_command /dev/loop0 Disclaimer: Just because you *can* do this, doesn't necessarily mean it is a good idea On Thu, Mar 16, 2023 at 3:29 PM Mohr, Rick via lustre-discuss < lustre-discuss@lists.lustre.org> wrote: > Are you asking if you can mount Lustre on a client so that it shows up as > a block device? If so, the answer to that is you can't. Lustre does not > appear as a block device to the clients. > > -Rick > > > > On 3/16/23, 3:44 PM, "lustre-discuss on behalf of Shambhu Raje via > lustre-discuss" <lustre-discuss-boun...@lists.lustre.org <mailto: > lustre-discuss-boun...@lists.lustre.org> on behalf of > lustre-discuss@lists.lustre.org <mailto:lustre-discuss@lists.lustre.org>> > wrote: > > > When we mount a lustre file system on client, the lustre file system does > not use block device on client side. Instead it uses virtual file system > namespace. Mounting point will not be shown when we do 'lsblk'. As it only > show on 'df-hT'. > > > How can we mount lustre file system on block such that when we write > something with lusterfs then it can be shown in block device?? > Can share command?? > > > > > > > > > > > > _______________________________________________ > lustre-discuss mailing list > lustre-discuss@lists.lustre.org > http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org > -- ------------------------------ Jeff Johnson Co-Founder Aeon Computing jeff.john...@aeoncomputing.com www.aeoncomputing.com t: 858-412-3810 x1001 f: 858-412-3845 m: 619-204-9061 4170 Morena Boulevard, Suite C - San Diego, CA 92117 High-Performance Computing / Lustre Filesystems / Scale-out Storage
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