drivers/staging/lustre/sysfs-fs-lustre

   1 What:           /sys/fs/lustre/version
   2 Date:           May 2015
   3 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
   4 Description:
   5                 Shows current running lustre version.
   6
   7 What:           /sys/fs/lustre/pinger
   8 Date:           May 2015
   9 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  10 Description:
  11                 Shows if the lustre module has pinger support.
  12                 "on" means yes and "off" means no.
  13
  14 What:           /sys/fs/lustre/health
  15 Date:           May 2015
  16 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  17 Description:
  18                 Shows whenever current system state believed to be "healthy",
  19                 "NOT HEALTHY", or "LBUG" whenever lustre has experienced
  20                 an internal assertion failure
  21
  22 What:           /sys/fs/lustre/jobid_name
  23 Date:           May 2015
  24 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  25 Description:
  26                 Currently running job "name" for this node to be transferred
  27                 to Lustre servers for purposes of QoS and statistics gathering.
  28                 Writing into this file will change the name, reading outputs
  29                 currently set value.
  30
  31 What:           /sys/fs/lustre/jobid_var
  32 Date:           May 2015
  33 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  34 Description:
  35                 Control file for lustre "jobstats" functionality, write new
  36                 value from the list below to change the mode:
  37                 disable - disable job name reporting to the servers (default)
  38                 procname_uid - form the job name as the current running
  39                                command name and pid with a dot in between
  40                                e.g. dd.1253
  41                 nodelocal - use jobid_name value from above.
  42
  43 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/blocksize
  44 Date:           May 2015
  45 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  46 Description:
  47                 Biggest blocksize on object storage server for this filesystem.
  48
  49 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/kbytestotal
  50 Date:           May 2015
  51 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  52 Description:
  53                 Shows total number of kilobytes of space on this filesystem
  54
  55 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/kbytesfree
  56 Date:           May 2015
  57 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  58 Description:
  59                 Shows total number of free kilobytes of space on this filesystem
  60
  61 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/kbytesavail
  62 Date:           May 2015
  63 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  64 Description:
  65                 Shows total number of free kilobytes of space on this filesystem
  66                 actually available for use (taking into account per-client
  67                 grants and filesystem reservations).
  68
  69 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/filestotal
  70 Date:           May 2015
  71 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  72 Description:
  73                 Shows total number of inodes on the filesystem.
  74
  75 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/filesfree
  76 Date:           May 2015
  77 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  78 Description:
  79                 Shows estimated number of free inodes on the filesystem
  80
  81 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/client_type
  82 Date:           May 2015
  83 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  84 Description:
  85                 Shows whenever this filesystem considers this client to be
  86                 compute cluster-local or remote. Remote clients have
  87                 additional uid/gid convrting logic applied.
  88
  89 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/fstype
  90 Date:           May 2015
  91 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  92 Description:
  93                 Shows filesystem type of the filesystem
  94
  95 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/uuid
  96 Date:           May 2015
  97 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
  98 Description:
  99                 Shows this filesystem superblock uuid
 100
 101 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/max_read_ahead_mb
 102 Date:           May 2015
 103 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 104 Description:
 105                 Sets maximum number of megabytes in system memory to be
 106                 given to read-ahead cache.
 107
 108 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/max_read_ahead_per_file_mb
 109 Date:           May 2015
 110 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 111 Description:
 112                 Sets maximum number of megabytes to read-ahead for a single file
 113
 114 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/max_read_ahead_whole_mb
 115 Date:           May 2015
 116 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 117 Description:
 118                 For small reads, how many megabytes to actually request from
 119                 the server as initial read-ahead.
 120
 121 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/checksum_pages
 122 Date:           May 2015
 123 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 124 Description:
 125                 Enables or disables per-page checksum at llite layer, before
 126                 the pages are actually given to lower level for network transfer
 127
 128 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/stats_track_pid
 129 Date:           May 2015
 130 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 131 Description:
 132                 Limit Lustre vfs operations gathering to just a single pid.
 133                 0 to track everything.
 134
 135 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/stats_track_ppid
 136 Date:           May 2015
 137 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 138 Description:
 139                 Limit Lustre vfs operations gathering to just a single ppid.
 140                 0 to track everything.
 141
 142 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/stats_track_gid
 143 Date:           May 2015
 144 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 145 Description:
 146                 Limit Lustre vfs operations gathering to just a single gid.
 147                 0 to track everything.
 148
 149 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/statahead_max
 150 Date:           May 2015
 151 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 152 Description:
 153                 Controls maximum number of statahead requests to send when
 154                 sequential readdir+stat pattern is detected.
 155
 156 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/statahead_agl
 157 Date:           May 2015
 158 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 159 Description:
 160                 Controls if AGL (async glimpse ahead - obtain object information
 161                 from OSTs in parallel with MDS during statahead) should be
 162                 enabled or disabled.
 163                 0 to disable, 1 to enable.
 164
 165 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/lazystatfs
 166 Date:           May 2015
 167 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 168 Description:
 169                 Controls statfs(2) behaviour in the face of down servers.
 170                 If 0, always wait for all servers to come online,
 171                 if 1, ignote inactive servers.
 172
 173 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/max_easize
 174 Date:           May 2015
 175 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 176 Description:
 177                 Shows maximum number of bytes file striping data could be
 178                 in current configuration of storage.
 179
 180 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/default_easize
 181 Date:           May 2015
 182 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 183 Description:
 184                 Shows maximum observed file striping data seen by this
 185                 filesystem client instance.
 186
 187 What:           /sys/fs/lustre/llite/<fsname>-<uuid>/xattr_cache
 188 Date:           May 2015
 189 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 190 Description:
 191                 Controls extended attributes client-side cache.
 192                 1 to enable, 0 to disable.
 193
 194 What:           /sys/fs/lustre/ldlm/cancel_unused_locks_before_replay
 195 Date:           May 2015
 196 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 197 Description:
 198                 Controls if client should replay unused locks during recovery
 199                 If a client tends to have a lot of unused locks in LRU,
 200                 recovery times might become prolonged.
 201                 1 - just locally cancel unused locks (default)
 202                 0 - replay unused locks.
 203
 204 What:           /sys/fs/lustre/ldlm/namespaces/<name>/resource_count
 205 Date:           May 2015
 206 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 207 Description:
 208                 Displays number of lock resources (objects on which individual
 209                 locks are taken) currently allocated in this namespace.
 210
 211 What:           /sys/fs/lustre/ldlm/namespaces/<name>/lock_count
 212 Date:           May 2015
 213 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 214 Description:
 215                 Displays number or locks allocated in this namespace.
 216
 217 What:           /sys/fs/lustre/ldlm/namespaces/<name>/lru_size
 218 Date:           May 2015
 219 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 220 Description:
 221                 Controls and displays LRU size limit for unused locks for this
 222                 namespace.
 223                 0 - LRU size is unlimited, controlled by server resources
 224                 positive number - number of locks to allow in lock LRU list
 225
 226 What:           /sys/fs/lustre/ldlm/namespaces/<name>/lock_unused_count
 227 Date:           May 2015
 228 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 229 Description:
 230                 Display number of locks currently sitting in the LRU list
 231                 of this namespace
 232
 233 What:           /sys/fs/lustre/ldlm/namespaces/<name>/lru_max_age
 234 Date:           May 2015
 235 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 236 Description:
 237                 Maximum number of milliseconds a lock could sit in LRU list
 238                 before client would voluntarily cancel it as unused.
 239
 240 What:           /sys/fs/lustre/ldlm/namespaces/<name>/early_lock_cancel
 241 Date:           May 2015
 242 Contact:        "Oleg Drokin" <oleg.drokin@intel.com>
 243 Description:
 244                 Controls "early lock cancellation" feature on this namespace
 245                 if supported by the server.
 246                 When enabled, tries to preemtively cancel locks that would be
 247                 cancelled by verious operations and bundle the cancellation
 248                 requests in the same RPC as the main operation, which results
 249                 in significant speedups due to reduced lock-pingpong RPCs.
 250                 0 - disabled
 251                 1 - enabled (default)