Thanks, Varun. Please also fill out a page on the wiki using this template: http://www.gluster.org/community/documentation/index.php/Features/Feature_Template And put the finished page in this directory: http://www.gluster.org/community/documentation/index.php/Features/<ngquota_page> Thanks! -JM ----- Original Message ----- > Hi Everyone, > As gluster quota was facing some issues in its functionality, its required to > make it fool-proof, robust and reliable. So, below are the some of the major > problems we are facing and the modifications to overcome the same. > Current implementation > * Client side implementation of quota > - Not secure > - Increased traffic in updating the ctx > - Relying on xattrs updation through lookup calls > * Problem with NFS mount > - lack of lookups (handling through 'file handles') > So, the new design is proposed, > * Two level of quota implementation soft and hard quota, similar to the XFS's > quota, is introduced. > A message is logged on reaching soft quota and no more writes allowed after > hard limit. > * Quota is moved to server-side. > Server side implementation removes the client dependability for specific > calls and secures the quota from mounting with modified volfile. > To get the cluster view, > A trusted quota client process will be spawned, on set of random 'n' bricks, > containing only the cluster xlators, to aggregate the size on all the bricks > of the volume. By querying for getxattrs on the directories, for a fixed > time interval (say t secs), it updates the context of the quota xlator in > server graph, by sending the setxattr with a key in dict. The t depends on > lists, in the descending order for, 1. below soft limit 2. above soft limit; > AND it is tunable. > Thus in the current implementation we'll have 2 quota xlators: one in server > graph, and one in trusted client of which the sole purpose will be to > aggregate the quota xattrs on all the bricks and send the same to server > quota xlator. > So, please share your opinion/suggestion/concerns about the above draft. > Thanks-to: Vijay, Amar, Raghavendra & Junaid. > Regards > Varun Shastry > _______________________________________________ > Gluster-devel mailing list > Gluster-devel@xxxxxxxxxx > https://lists.nongnu.org/mailman/listinfo/gluster-devel
