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Possibility to physically reserve space without writing leaf blocks


 204                 SPA_FEATURE_NONE
 205         };
 206         zfeature_register(SPA_FEATURE_BOOKMARKS,
 207             "com.delphix:bookmarks", "bookmarks",
 208             "\"zfs bookmark\" command",
 209             B_TRUE, B_FALSE, B_FALSE, bookmarks_deps);
 210 
 211         static const spa_feature_t filesystem_limits_deps[] = {
 212             SPA_FEATURE_EXTENSIBLE_DATASET,
 213             SPA_FEATURE_NONE
 214         };
 215         zfeature_register(SPA_FEATURE_FS_SS_LIMIT,
 216             "com.joyent:filesystem_limits", "filesystem_limits",
 217             "Filesystem and snapshot limits.", B_TRUE, B_FALSE, B_FALSE,
 218             filesystem_limits_deps);
 219 
 220         zfeature_register(SPA_FEATURE_EMBEDDED_DATA,
 221             "com.delphix:embedded_data", "embedded_data",
 222             "Blocks which compress very well use even less space.",
 223             B_FALSE, B_TRUE, B_TRUE, NULL);





 224 }


 204                 SPA_FEATURE_NONE
 205         };
 206         zfeature_register(SPA_FEATURE_BOOKMARKS,
 207             "com.delphix:bookmarks", "bookmarks",
 208             "\"zfs bookmark\" command",
 209             B_TRUE, B_FALSE, B_FALSE, bookmarks_deps);
 210 
 211         static const spa_feature_t filesystem_limits_deps[] = {
 212             SPA_FEATURE_EXTENSIBLE_DATASET,
 213             SPA_FEATURE_NONE
 214         };
 215         zfeature_register(SPA_FEATURE_FS_SS_LIMIT,
 216             "com.joyent:filesystem_limits", "filesystem_limits",
 217             "Filesystem and snapshot limits.", B_TRUE, B_FALSE, B_FALSE,
 218             filesystem_limits_deps);
 219 
 220         zfeature_register(SPA_FEATURE_EMBEDDED_DATA,
 221             "com.delphix:embedded_data", "embedded_data",
 222             "Blocks which compress very well use even less space.",
 223             B_FALSE, B_TRUE, B_TRUE, NULL);
 224 
 225         zfeature_register(SPA_FEATURE_SPACE_RESERVATION,
 226             "org.nexenta:space_reservation", "space_reservation",
 227             "Possibility to physically reserve space on disk", B_FALSE, B_FALSE,
 228             B_FALSE, NULL);
 229 }