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=http size=50%

COPYRIGHT

       2018, dev@trafficserver.apache.org