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 for specific protocols. You can further configure these volumes
       to store data from certain origin servers and/or domains in the hosting.config file.

       IMPORTANT:
          The  volume  configuration  must  be  the same on all nodes in a cluster. You must stop Traffic Server
          before you change the cache volume size and protocol assignment. For step-by-step  instructions  about
          partitioning the cache, refer to partitioning-the-cache.

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 evenly between HTTP and HTTPS requests:

          volume=1 scheme=http size=50%
          volume=2 scheme=https size=50%

COPYRIGHT

       2014, dev@trafficserver.apache.org

5.3                                              April 18, 2016                                 VOLUME.CONFIG(5)