Dear all, I've not seen posts from people using LZ4 compression, and wondered what other peoples experiences are if they have tried LZ4 on Nautilus. Since enabling LZ4 we have copied 1.9 PB into a pool without problem. However, and if "ceph df detail" is accurate, we are not getting much compression. Using LZ4 with ZFS we normally expect to see ~1.2x with this data. [root@ceph-s1 ~]# ceph df detail POOL ID STORED OBJECTS USED %USED ec82pool 2 1.5 PiB 559.16M 1.9 PiB 62.66 MAX AVAIL QUOTA OBJECTS QUOTA BYTES DIRTY 914 TiB N/A N/A 559.16M USED COMPR UNDER COMPR 22 TiB 41 TiB Compression enabled as follows. # ceph osd pool set ec82pool compression_algorithm lz4 set pool 2 compression_algorithm to lz4 # ceph osd pool set ec82pool compression_mode force set pool 2 compression_mode to force Any thoughts? Jake -- MRC Laboratory of Molecular Biology Francis Crick Avenue, Cambridge CB2 0QH, UK. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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