Hi! Am 23.01.20 um 16:33 schrieb Bernd Melchers: > we are copying large data sets within our lustre filesystem and between > lustre and an external nfs server. In both cases the performance is > unexpected low and the reason seems that rsync is reading and writing in > 32 kB Blocks, whereas our lustre would be more happy with 4 MB > Blocks. > rsync has an --block-size=SIZE Parameter but this adjusts only the > checksum block size (and the maximum is 131072), not the i/o block size. > Is there a solution to accelerate rsync?
Assuming sequential access to sufficiently large files, most reads issued by a Lustre client with default setting should already be RPC-sized, regardless of the size used in the read() syscall. Maybe double-check your readahead settings? Kind regards, Daniel -- Daniel Kobras Principal Architect Puzzle ITC Deutschland +49 7071 14316 0 www.puzzle-itc.de -- Puzzle ITC Deutschland GmbH Sitz der Gesellschaft: Jurastr. 27/1, 72072 Tübingen Eingetragen am Amtsgericht Stuttgart HRB 765802 Geschäftsführer: Lukas Kallies, Daniel Kobras, Mark Pröhl _______________________________________________ lustre-discuss mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
