NAME

       ganesha-cache-config - NFS Ganesha Cache Configuration File

SYNOPSIS

       /etc/ganesha/ganesha.conf

DESCRIPTION

       NFS-Ganesha reads the configuration data from: | /etc/ganesha/ganesha.conf

       This  file lists NFS-Ganesha Cache config options.  These options used to be configured in
       the CACHEINODE block.  They may still be used in that block, but it is deprecated and will
       go away.  The MDCACHE block takes precedence over the CACHEINODE block.

   MDCACHE {}
       NParts (uint32, range 1 to 32633, default 7)
              Partitions in the Cache_Inode tree.

       Cache_Size(uint32, range 1 to UINT32_MAX, default 32633)
              Per-partition hash table size.

       Use_Getattr_Directory_Invalidation(bool, default false)
              Use getattr for directory invalidation.

       Dir_Chunk(uint32, range 0 to UINT32_MAX, default 128)
              Size  of  per-directory  dirent  cache  chunks,  0  means directory chunking is not
              enabled.

       Detached_Mult(uint32, range 1 to UINT32_MAX, default 1)
              Max number of detached directory entries expressed as a multiple of the chunk size.

       Entries_HWMark(uint32, range 1 to UINT32_MAX, default 100000)
              The point at which object cache entries will start being reused.

       Entries_Release_Size(uint32, range 0 to UINT32_MAX, default 100)
              The number of entries attempted to release each time  when  the  handle  cache  has
              exceeded the entries high water mark.

       Chunks_HWMark(uint32, range 1 to UINT32_MAX, default 100000)
              The point at which dirent cache chunks will start being reused.

       LRU_Run_Interval(uint32, range 1 to 24 * 3600, default 90)
              Base interval in seconds between runs of the LRU cleaner thread.

       FD_Limit_Percent(uint32, range 0 to 100, default 99)
              The  percentage  of the system-imposed maximum of file descriptors at which Ganesha
              will deny requests.

       FD_HWMark_Percent(uint32, range 0 to 100, default 90)
              The percentage of the  system-imposed  maximum  of  file  descriptors  above  which
              Ganesha will make greater efforts at reaping.

       FD_LWMark_Percent(uint32, range 0 to 100, default 50)
              The  percentage  of  the  system-imposed  maximum  of  file descriptors below which
              Ganesha will not reap file descriptors.

       Reaper_Work(uint32, range 1 to 2000, default 0)
              Roughly, the amount of work to do on each pass  through  the  thread  under  normal
              conditions.   (Ideally,  a  multiple  of  the  number  of  lanes.)  This setting is
              deprecated.  Please use Reaper_Work_Per_Lane

       Reaper_Work_Per_Lane(uint32, range 1 to UINT32_MAX, default 50)
              This is the number of handles per lane to scan  when  performing  LRU  maintenance.
              This task is performed by the Reaper thread.

       Biggest_Window(uint32, range 1 to 100, default 40)
              The  largest  window  (as  a percentage of the system-imposed limit on FDs) of work
              that we will do in extremis.

       Required_Progress(uint32, range 1 to 50, default 5)
              Percentage of progress toward the high water mark required in in a pass through the
              thread when in extremis

       Futility_Count(uint32, range 1 to 50, default 8)
              Number  of  failures to approach the high watermark before we disable caching, when
              in extremis.

       Dirmap_HWMark(uint32, range 1 to UINT32_MAX, default 10000)
              The point at which dirmap entries are reused.  This puts a practical limit  on  the
              number  of  simultaneous  readdirs  that  may  be  in  progress  on an export for a
              whence-is-name FSAL (currently only FSAL_RGW)

SEE ALSO

       ganesha-config(8)

                                           Sep 13, 2022                   GANESHA-CACHE-CONFIG(8)