NAME

       volume.config - Traffic Server cache volume configuration file

       The volume.config file enables you to manage your cache space more efficiently and restrict disk usage by
       creating  cache  volumes  of  different sizes. By distributing the cache across multiple volumes, you can
       help decrease single-lock pressure when there are not many hard drives present. You can further configure
       these volumes to store data from certain origin servers and/or domains in the hosting.config file.

FORMAT

       For each volume you want to create, enter a line with the following format:

          volume=volume_number  scheme=protocol_type  size=volume_size

       where volume_number is a  number  between  1  and  255  (the  maximum  number  of  volumes  is  255)  and
       protocol_type  is  http. Traffic Server supports http for HTTP volume types; volume_size is the amount of
       cache space allocated to the volume. This value can be either a percentage of the total cache space or an
       absolute value. The absolute value must be a multiple of 128 MB, where 128 MB is the smallest value.   If
       you specify a percentage, then the size is rounded down to the closest multiple of 128 MB.

       Each  volume  is  striped  across  several  disks to achieve parallel I/O. For example: if there are four
       disks, then a 1-GB volume will have 256 MB on each  disk  (assuming  each  disk  has  enough  free  space
       available).  If  you  do  not  allocate all the disk space in the cache, then the extra disk space is not
       used. You can use the extra space later to create new volumes without deleting and clearing the  existing
       volumes.

EXAMPLES

       The  following  example  partitions  the  cache across 5 volumes to decreasing single-lock pressure for a
       machine with few drives.:

          volume=1 scheme=http size=20%
          volume=2 scheme=http size=20%
          volume=3 scheme=http size=20%
          volume=4 scheme=http size=20%
          volume=5 scheme=http size=20%

COPYRIGHT

       2020, dev@trafficserver.apache.org

8.0                                               Feb 03, 2020                                  VOLUME.CONFIG(5)