[ceph-users] what does omap do?

Hello everyone: I'm using ceph-10.1.1, when I write data to rbd image, I found that there are many operations about omap. Especially when I use small IO block size, e.g. 1K, to write 64MB data into rbd image, the data of omap put though rocksdb can be almost 64MB, that is a big write a

[ceph-users] bluestore overlay write failure

Hi All I'm using ceph-10.1.1, when I open overlay write, some OSDs will down and out when I use fio to test 4K IO write of rbd.The default option is below :OPTION(bluestore_overlay_max, OPT_INT, 0) I change the 0 to 512 to make data write that small than 64K processed by overlay, then some OSD

Re: [ceph-users] Ceph 10.1.1 rbd map fail

der 22 (4096 kB objects) block_name_prefix: rbd_data.5e3074b0dc51 format: 2 features: layering, exclusive-lock, object-map, fast-diff, deep-flatten flags: It looks like that some of the features are not supported by my rbd kernel module. Because when I get rid of the last 4 features, and on

Re: [ceph-users] Ceph 10.1.1 rbd map fail

could mean that I need to upgrade kernel client up to 3.15 or disable tunable 3 features. Our cluster is not convenient to upgrade. Could you tell me how to disable tunable 3 features? Thanks! Kind Regards, Haitao Wang At 2016-06-22 12:33:42, "Brad Hubbard" wrote: >On Wed, Jun

[ceph-users] Ceph 10.1.1 rbd map fail

Hi All I'm using ceph-10.1.1 to map a rbd image ,but it dosen't work ,the error messages are:root@heaven:~#rbd map rbd/myimage --id admin 2016-06-22 11:16:34.546623 7fc87ca53d80 -1 WARNING: the following dangerous and experimental features are enabled: bluestore,rocksdb 2016-06-22 11:16:34.54716