Nicholas Henke wrote: > Andreas Dilger wrote: >> >> It wasn't mentioned here, but this is already planned. There will be >> new commands "lctl get_param" and "lctl set_param" (or similar) that >> will be usable by scripts to get/set Lustre tunables. This will work >> with both /proc and .../.lustre files so will allow scripts to move >> over to the new mechanism. >> >> For user-space servers there will be no alternative but to use the lctl >> mechanism since /proc entries will not exist at all. Then again, there >> will not be any existing systems using the old mechanism since uOSS will >> only work with ZFS. >> > > How is get_param/set_param going to work for the cases like clearing > the LRU - where one might not know the names of all of the parameters: > > for LRU in /proc/fs/lustre/ldlm/namespaces/*/lru_size; do echo clear > > $LRU; done > > Nic In this particular case, there will not be a "namespaces" subdirectory -- there will be different files in the .lustre directories of different mount points: /mnt/test/.lustre/ldlm/lru_size /mnt/fast2/.lustre/ldlm/lru_size etc
But in general, if there are any non-predefined path names for userspace server parameters, we'll have to add a lctl method of listing them. _______________________________________________ Lustre-devel mailing list Lustre-devel@clusterfs.com https://mail.clusterfs.com/mailman/listinfo/lustre-devel
