Hi , I have recently been working the preliminary research whether ceph can use at our cloud computing storage system in the future , ceph is a very very excellent file system.But ,Now ,i hit a very important problem for us: Normally, as ceph described , all of the data are saved at OSDs with CRUSHMAP at ceph system. but my goal is to : 1. add a ext3 disk to ceph system ,but doesn't set it as a OSD; 2. save the normal data at the OSDs of a ceph system; 3. save the special data to a local ext3 disk at a ceph system, the ext3 disk is not set as a ceph OSD,but its infos are added to MDS and MON,when Write the special data at a ceph client ,these special data are not saved to ceph server OSDs ,but saved at the local ext3 disk. like this: At ceph client: $ mount.ceph 1.2.3.4:6789:/ /ceph $ cd /ceph $ ls cloud user secret when do writing,"cloud and user" folder data are saved to ceph OSDs , but "secret" folder data are saved to a local ext3 disk . My question is: Q1- If i add a new OSD to the ceph system ,but i do a special CRUSH placement map . Could this ways solved this problem ?,If can ,How ? Q2 - If to implement this function as a patch myself, Could you give me any ideas ? or what parts of ceph codes(server/client) that i need look into ? Thanks for all help and reply . Jeff.Wu Transoft.inc ,Sr.software engineer. ãã -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
