On 11/26/2012 04:10 PM, brady wrote:
Hello, I have a general question. Is there a specific character limit for rbd block devices? In attempting to map a block device with a name that is 36 characters or more, I am getting the following error:rbd map (36+ character name) --user admin --secret /etc/ceph/keyring.key add failed: (2) No such file or directory When using the same command to map a device with 35 characters or less, the device is mapped as expected. Any insight into this issue would be greatly appreciated. -Brady
Which kernel version are you using? A year ago there was a 40-char limit on objects names in the kernel's libceph module, hence the failure at 36 char rbd image names (36 char name + ".rbd" is the format 1 header object name). This was extended to a 96-char limit in linux 3.2. There's no real limit in userspace still (http://tracker.newdream.net/issues/1701). Josh -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
