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What: /sys/fs/lustre/version
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows current running lustre version.
What: /sys/fs/lustre/pinger
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows if the lustre module has pinger support.
"on" means yes and "off" means no.
What: /sys/fs/lustre/health
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows whenever current system state believed to be "healthy",
"NOT HEALTHY", or "LBUG" whenever lustre has experienced
an internal assertion failure
What: /sys/fs/lustre/jobid_name
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Currently running job "name" for this node to be transferred
to Lustre servers for purposes of QoS and statistics gathering.
Writing into this file will change the name, reading outputs
currently set value.
What: /sys/fs/lustre/jobid_var
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Control file for lustre "jobstats" functionality, write new
value from the list below to change the mode:
disable - disable job name reporting to the servers (default)
procname_uid - form the job name as the current running
command name and pid with a dot in between
e.g. dd.1253
nodelocal - use jobid_name value from above.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/blocksize
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Biggest blocksize on object storage server for this filesystem.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/kbytestotal
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows total number of kilobytes of space on this filesystem
What: /sys/fs/lustre/llite/<fsname>-<uuid>/kbytesfree
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows total number of free kilobytes of space on this filesystem
What: /sys/fs/lustre/llite/<fsname>-<uuid>/kbytesavail
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows total number of free kilobytes of space on this filesystem
actually available for use (taking into account per-client
grants and filesystem reservations).
What: /sys/fs/lustre/llite/<fsname>-<uuid>/filestotal
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows total number of inodes on the filesystem.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/filesfree
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows estimated number of free inodes on the filesystem
What: /sys/fs/lustre/llite/<fsname>-<uuid>/client_type
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows whenever this filesystem considers this client to be
compute cluster-local or remote. Remote clients have
additional uid/gid convrting logic applied.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/fstype
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows filesystem type of the filesystem
What: /sys/fs/lustre/llite/<fsname>-<uuid>/uuid
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows this filesystem superblock uuid
What: /sys/fs/lustre/llite/<fsname>-<uuid>/max_read_ahead_mb
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Sets maximum number of megabytes in system memory to be
given to read-ahead cache.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/max_read_ahead_per_file_mb
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Sets maximum number of megabytes to read-ahead for a single file
What: /sys/fs/lustre/llite/<fsname>-<uuid>/max_read_ahead_whole_mb
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
For small reads, how many megabytes to actually request from
the server as initial read-ahead.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/checksum_pages
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Enables or disables per-page checksum at llite layer, before
the pages are actually given to lower level for network transfer
What: /sys/fs/lustre/llite/<fsname>-<uuid>/stats_track_pid
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Limit Lustre vfs operations gathering to just a single pid.
0 to track everything.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/stats_track_ppid
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Limit Lustre vfs operations gathering to just a single ppid.
0 to track everything.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/stats_track_gid
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Limit Lustre vfs operations gathering to just a single gid.
0 to track everything.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/statahead_max
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Controls maximum number of statahead requests to send when
sequential readdir+stat pattern is detected.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/statahead_agl
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Controls if AGL (async glimpse ahead - obtain object information
from OSTs in parallel with MDS during statahead) should be
enabled or disabled.
0 to disable, 1 to enable.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/lazystatfs
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Controls statfs(2) behaviour in the face of down servers.
If 0, always wait for all servers to come online,
if 1, ignote inactive servers.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/max_easize
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows maximum number of bytes file striping data could be
in current configuration of storage.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/default_easize
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Shows maximum observed file striping data seen by this
filesystem client instance.
What: /sys/fs/lustre/llite/<fsname>-<uuid>/xattr_cache
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Controls extended attributes client-side cache.
1 to enable, 0 to disable.
What: /sys/fs/lustre/ldlm/cancel_unused_locks_before_replay
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Controls if client should replay unused locks during recovery
If a client tends to have a lot of unused locks in LRU,
recovery times might become prolonged.
1 - just locally cancel unused locks (default)
0 - replay unused locks.
What: /sys/fs/lustre/ldlm/namespaces/<name>/resource_count
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Displays number of lock resources (objects on which individual
locks are taken) currently allocated in this namespace.
What: /sys/fs/lustre/ldlm/namespaces/<name>/lock_count
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Displays number or locks allocated in this namespace.
What: /sys/fs/lustre/ldlm/namespaces/<name>/lru_size
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Controls and displays LRU size limit for unused locks for this
namespace.
0 - LRU size is unlimited, controlled by server resources
positive number - number of locks to allow in lock LRU list
What: /sys/fs/lustre/ldlm/namespaces/<name>/lock_unused_count
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Display number of locks currently sitting in the LRU list
of this namespace
What: /sys/fs/lustre/ldlm/namespaces/<name>/early_lock_cancel
Date: May 2015
Contact: "Oleg Drokin" <oleg.drokin@intel.com>
Description:
Controls "early lock cancellation" feature on this namespace
if supported by the server.
When enabled, tries to preemtively cancel locks that would be
cancelled by verious operations and bundle the cancellation
requests in the same RPC as the main operation, which results
in significant speedups due to reduced lock-pingpong RPCs.
0 - disabled
1 - enabled (default)
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