.. _h2load-1-output:

OUTPUT
------

requests
  total
    The number of requests h2load was instructed to make.
  started
    The number of requests h2load has started.
  done
    The number of requests completed.
  succeeded
    The number of requests completed successfully.  Only HTTP status
    code 2xx or3xx are considered as success.
  failed
    The number of requests failed, including HTTP level failures
    (non-successful HTTP status code).
  errored
    The number of requests failed, except for HTTP level failures.
    This is the subset of the number reported in ``failed`` and most
    likely the network level failures or stream was reset by
    RST_STREAM.
  timeout
    The number of requests whose connection timed out before they were
    completed.   This  is  the  subset   of  the  number  reported  in
    ``errored``.

status codes
  The number of status code h2load received.

traffic
  total
    The number of bytes received from the server "on the wire".  If
    requests were made via TLS, this value is the number of decrypted
    bytes.
  headers
    The  number  of response  header  bytes  from the  server  without
    decompression.  The  ``space savings`` shows efficiency  of header
    compression.  Let ``decompressed(headers)`` to the number of bytes
    used for header fields after decompression.  The ``space savings``
    is calculated  by (1 - ``headers``  / ``decompressed(headers)``) *
    100.  For HTTP/1.1, this is usually  0.00%, since it does not have
    header compression.  For HTTP/2 and SPDY, it shows some insightful
    numbers.
  data
    The number of response body bytes received from the server.

time for request
  min
    The minimum time taken for request and response.
  max
    The maximum time taken for request and response.
  mean
    The mean time taken for request and response.
  sd
    The standard deviation of the time taken for request and response.
  +/- sd
    The fraction of the number of requests within standard deviation
    range (mean +/- sd) against total number of successful requests.

time for connect
  min
    The minimum time taken to connect to a server.
  max
    The maximum time taken to connect to a server.
  mean
    The mean time taken to connect to a server.
  sd
    The standard deviation of the time taken to connect to a server.
  +/- sd
    The  fraction  of  the   number  of  connections  within  standard
    deviation range (mean  +/- sd) against total  number of successful
    connections.

time for 1st byte (of (decrypted in case of TLS) application data)
  min
    The minimum time taken to get 1st byte from a server.
  max
    The maximum time taken to get 1st byte from a server.
  mean
    The mean time taken to get 1st byte from a server.
  sd
    The standard deviation of the time taken to get 1st byte from a
    server.
  +/- sd
    The fraction of the number of connections within standard
    deviation range (mean +/- sd) against total number of successful
    connections.

req/s (client)
  min
    The minimum request per second among all clients.
  max
    The maximum request per second among all clients.
  mean
    The mean request per second among all clients.
  sd
    The standard deviation of request per second among all clients.
    server.
  +/- sd
    The fraction of the number of connections within standard
    deviation range (mean +/- sd) against total number of successful
    connections.

FLOW CONTROL
------------

h2load sets large flow control window by default, and effectively
disables flow control to avoid under utilization of server
performance.  To set smaller flow control window, use :option:`-w` and
:option:`-W` options.  For example, use ``-w16 -W16`` to set default
window size described in HTTP/2 and SPDY protocol specification.

SEE ALSO
--------

:manpage:`nghttp(1)`, :manpage:`nghttpd(1)`, :manpage:`nghttpx(1)`