Provided by: varnish_3.0.5-2ubuntu0.1_amd64 
NAME
varnishd - HTTP accelerator daemon
SYNOPSIS
varnishd [-a address[:port]] [-b host[:port]] [-d] [-F] [-f config]
[-g group] [-h type[,options]] [-i identity] [-l shmlogsize] [-n name] [-P file]
[-p param=value] [-s type[,options]] [-T address[:port]] [-t ttl] [-u user] [-V]
[-w min[,max[,timeout]]]
DESCRIPTION
The varnishd daemon accepts HTTP requests from clients, passes them on to a backend server
and caches the returned documents to better satisfy future requests for the same document.
OPTIONS
-a address[:port][,address[:port][...]
Listen for client requests on the specified address and port. The address can be a
host name (“localhost”), an IPv4 dotted-quad (“127.0.0.1”), or an IPv6 address
enclosed in square brackets (“[::1]”). If address is not specified, varnishd will
listen on all available IPv4 and IPv6 interfaces. If port is not specified, the
default HTTP port as listed in /etc/services is used. Multiple listening addresses
and ports can be speci‐ fied as a whitespace- or comma-separated list.
-b host[:port]
Use the specified host as backend server. If port is not specified, the default is
8080.
-C Print VCL code compiled to C language and exit. Specify the VCL file to compile
with the -f option.
-d Enables debugging mode: The parent process runs in the foreground with a CLI
connection on stdin/stdout, and the child process must be started explicitly with a
CLI command. Terminating the parent process will also terminate the child.
-F Run in the foreground.
-f config
Use the specified VCL configuration file instead of the builtin default. See
vcl(7) for details on VCL syntax. When no configuration is supplied varnishd will
not start the cache process.
-g group
Specifies the name of an unprivileged group to which the child process should
switch before it starts accepting connections. This is a shortcut for specifying
the group run-time parameter.
-h type[,options]
Specifies the hash algorithm. See Hash Algorithms for a list of supported
algorithms.
-i identity
Specify the identity of the varnish server. This can be accessed using
server.identity from VCL
-l shmlogsize
Specify size of shmlog file. Scaling suffixes like 'k', 'm' can be used up to
(e)tabytes. Default is 80 Megabytes. Specifying less than 8 Megabytes is unwise.
-n name
Specify a name for this instance. Amonst other things, this name is used to
construct the name of the directory in which varnishd keeps temporary files and
persistent state. If the specified name begins with a forward slash, it is
interpreted as the absolute path to the directory which should be used for this
purpose.
-P file
Write the process's PID to the specified file.
-p param=value
Set the parameter specified by param to the specified value. See Run-Time
Parameters for a list of parameters. This option can be used multiple times to
specify multiple parameters.
-S file
Path to a file containing a secret used for authorizing access to the management
port.
-s [name=]type[,options]
Use the specified storage backend. See Storage Types for a list of supported
storage types. This option can be used multiple times to specify multiple storage
files. You can name the different backends. Varnish will then reference that
backend with the given name in logs, statistics, etc.
-T address[:port]
Offer a management interface on the specified address and port. See Management
Interface for a list of management commands.
-M address:port
Connect to this port and offer the command line interface. Think of it as a reverse
shell. When running with -M and there is no backend defined the child process (the
cache) will not start initially.
-t ttl Specifies a hard minimum time to live for cached documents. This is a shortcut for
specifying the default_ttl run-time parameter.
-u user
Specifies the name of an unprivileged user to which the child process should switch
before it starts accepting connections. This is a shortcut for specifying the user
run- time parameter.
If specifying both a user and a group, the user should be specified first.
-V Display the version number and exit.
-w min[,max[,timeout]]
Start at least min but no more than max worker threads with the specified idle timeout.
This is a shortcut for specifying the thread_pool_min, thread_pool_max and
thread_pool_timeout run-time parameters.
If only one number is specified, thread_pool_min and thread_pool_max are both set to
this number, and thread_pool_timeout has no effect.
Hash Algorithms
The following hash algorithms are available:
simple_list
A simple doubly-linked list. Not recommended for production use.
classic[,buckets]
A standard hash table. This is the default. The hash key is the CRC32 of the
object's URL modulo the size of the hash table. Each table entry points to a list
of elements which share the same hash key. The buckets parameter specifies the
number of entries in the hash table. The default is 16383.
critbit
A self-scaling tree structure. The default hash algorithm in 2.1. In comparison to
a more traditional B tree the critbit tree is almost completely lockless.
Storage Types
The following storage types are available:
malloc[,size]
Malloc is a memory based backend. Each object will be allocated from memory. If your
system runs low on memory swap will be used. Be aware that the size limitation only
limits the actual storage and that approximately 1k of memory per object will be used
for various internal structures.
The size parameter specifies the maximum amount of memory varnishd will allocate. The
size is assumed to be in bytes, unless followed by one of the following suffixes:
K, k The size is expressed in kibibytes.
M, m The size is expressed in mebibytes.
G, g The size is expressed in gibibytes.
T, t The size is expressed in tebibytes.
The default size is unlimited.
Mallocs performance is bound by memory speed so it is very fast.
file[,path[,size[,granularity]]]
The file backend stores objects in memory backed by a file on disk with mmap. This is
the default storage backend and unless you specify another storage this one will used
along with Transient storage.
The path parameter specifies either the path to the backing file or the path to a
directory in which varnishd will create the backing file. The default is /tmp.
The size parameter specifies the size of the backing file. The size is assumed to be
in bytes, unless fol‐ lowed by one of the following suffixes:
K, k The size is expressed in kibibytes.
M, m The size is expressed in mebibytes.
G, g The size is expressed in gibibytes.
T, t The size is expressed in tebibytes.
% The size is expressed as a percentage of the free space on the
file system where it resides.
The default size is 50%.
If the backing file already exists, it will be truncated or expanded to the specified
size.
Note that if varnishd has to create or expand the file, it will not pre-allocate the
added space, leading to fragmentation, which may adversely impact performance.
Pre-creating the storage file using dd(1) will reduce fragmentation to a minimum.
The granularity parameter specifies the granularity of allocation. All allocations are
rounded up to this size. The size is assumed to be in bytes, unless followed by one of
the suffixes described for size except for %.
The default size is the VM page size. The size should be reduced if you have many
small objects.
File performance is typically limited by the write speed of the device, and depending
on use, the seek time.
persistent,path,size {experimental}
Persistent storage. Varnish will store objects in a file in a manner that will secure
the survival of most of the objects in the event of a planned or unplanned shutdown of
Varnish.
The path parameter specifies the path to the backing file. If the file doesn't exist
Varnish will create it.
The size parameter specifies the size of the backing file. The size is assumed to be
in bytes, unless followed by one of the following suffixes:
K, k The size is expressed in kibibytes.
M, m The size is expressed in mebibytes.
G, g The size is expressed in gibibytes.
T, t The size is expressed in tebibytes.
Varnish will split the file into logical silos and write to the silos in the manner of
a circular buffer. Only one silo will be kept open at any given point in time. Full
silos are sealed. When Varnish starts after a shutdown it will discard the content of
any silo that isn't sealed.
Transient Storage
If you name any of your storage backend "Transient" it will be used for transient
(short lived) objects. By default Varnish would use an unlimited malloc backend for
this.
Management Interface
If the -T option was specified, varnishd will offer a command-line management interface on
the specified address and port. The recommended way of connecting to the command-line
management interface is through varnishadm(1).
The commands available are documented in varnish(7).
Run-Time Parameters
Runtime parameters are marked with shorthand flags to avoid repeating the same text over
and over in the table below. The meaning of the flags are:
experimental
We have no solid information about good/bad/optimal values for this parameter.
Feedback with experience and observations are most welcome.
delayed
This parameter can be changed on the fly, but will not take effect immediately.
restart
The worker process must be stopped and restarted, before this parameter takes
effect.
reload The VCL programs must be reloaded for this parameter to take effect.
Here is a list of all parameters, current as of last time we remembered to update the
manual page. This text is produced from the same text you will find in the CLI if you use
the param.show command, so should there be a new parameter which is not listed here, you
can find the description using the CLI commands.
Be aware that on 32 bit systems, certain default values, such as workspace_client (=16k),
thread_pool_workspace (=16k), http_resp_size (=8k), http_req_size (=12k),
gzip_stack_buffer (=4k) and thread_pool_stack (=64k) are reduced relative to the values
listed here, in order to conserve VM space.
acceptor_sleep_decay
• Default: 0.900
• Flags: experimental
If we run out of resources, such as file descriptors or worker threads, the
acceptor will sleep between accepts. This parameter (multiplicatively) reduce the
sleep duration for each succesfull accept. (ie: 0.9 = reduce by 10%)
acceptor_sleep_incr
• Units: s
• Default: 0.001
• Flags: experimental
If we run out of resources, such as file descriptors or worker threads, the
acceptor will sleep between accepts. This parameter control how much longer we
sleep, each time we fail to accept a new connection.
acceptor_sleep_max
• Units: s
• Default: 0.050
• Flags: experimental
If we run out of resources, such as file descriptors or worker threads, the
acceptor will sleep between accepts. This parameter limits how long it can sleep
between attempts to accept new connections.
auto_restart
• Units: bool
• Default: on
Restart child process automatically if it dies.
ban_dups
• Units: bool
• Default: on
Detect and eliminate duplicate bans.
ban_lurker_sleep
• Units: s
• Default: 0.01
How long time does the ban lurker thread sleeps between successful attempts to push
the last item up the ban list. It always sleeps a second when nothing can be
done. A value of zero disables the ban lurker.
between_bytes_timeout
• Units: s
• Default: 60
Default timeout between bytes when receiving data from backend. We only wait for
this many seconds between bytes before giving up. A value of 0 means it will never
time out. VCL can override this default value for each backend request and backend
request. This parameter does not apply to pipe.
cc_command
• Default: exec gcc -std=gnu99 -pthread -fpic -shared -Wl,-x -o %o %s
• Flags: must_reload
Command used for compiling the C source code to a dlopen(3) loadable object. Any
occurrence of %s in the string will be replaced with the source file name, and %o
will be replaced with the output file name.
cli_buffer
• Units: bytes
• Default: 8192
Size of buffer for CLI input. You may need to increase this if you have big VCL
files and use the vcl.inline CLI command. NB: Must be specified with -p to have
effect.
cli_timeout
• Units: seconds
• Default: 10
Timeout for the childs replies to CLI requests from the master.
clock_skew
• Units: s
• Default: 10
How much clockskew we are willing to accept between the backend and our own clock.
connect_timeout
• Units: s
• Default: 0.7
Default connection timeout for backend connections. We only try to connect to the
backend for this many seconds before giving up. VCL can override this default value
for each backend and backend request.
critbit_cooloff
• Units: s
• Default: 180.0
• Flags:
How long time the critbit hasher keeps deleted objheads on the cooloff list.
default_grace
• Units: seconds
• Default: 10
• Flags: delayed
Default grace period. We will deliver an object this long after it has expired,
provided another thread is attempting to get a new copy. Objects already cached
will not be affected by changes made until they are fetched from the backend again.
default_keep
• Units: seconds
• Default: 0
• Flags: delayed
Default keep period. We will keep a useless object around this long, making it
available for conditional backend fetches. That means that the object will be
removed from the cache at the end of ttl+grace+keep.
default_ttl
• Units: seconds
• Default: 120
The TTL assigned to objects if neither the backend nor the VCL code assigns one.
Objects already cached will not be affected by changes made until they are fetched
from the backend again. To force an immediate effect at the expense of a total
flush of the cache use "ban.url ."
diag_bitmap
• Units: bitmap
• Default: 0
Bitmap controlling diagnostics code:
0x00000001 - CNT_Session states.
0x00000002 - workspace debugging.
0x00000004 - kqueue debugging.
0x00000008 - mutex logging.
0x00000010 - mutex contests.
0x00000020 - waiting list.
0x00000040 - object workspace.
0x00001000 - do not core-dump child process.
0x00002000 - only short panic message.
0x00004000 - panic to stderr.
0x00010000 - synchronize shmlog.
0x00020000 - synchronous start of persistence.
0x00040000 - release VCL early.
0x00080000 - ban-lurker debugging.
0x80000000 - do edge-detection on digest.
System Message: WARNING/2 (../../doc/sphinx/reference/params.rst:, line 132)
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esi_syntax
• Units: bitmap
• Default: 0
Bitmap controlling ESI parsing code:
0x00000001 - Don't check if it looks like XML
0x00000002 - Ignore non-esi elements
0x00000004 - Emit parsing debug records
0x00000008 - Force-split parser input (debugging)
System Message: WARNING/2 (../../doc/sphinx/reference/params.rst:, line 144)
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expiry_sleep
• Units: seconds
• Default: 1
How long the expiry thread sleeps when there is nothing for it to do.
fetch_chunksize
• Units: kilobytes
• Default: 128
• Flags: experimental
The default chunksize used by fetcher. This should be bigger than the majority of
objects with short TTLs. Internal limits in the storage_file module makes
increases above 128kb a dubious idea.
fetch_maxchunksize
• Units: kilobytes
• Default: 262144
• Flags: experimental
The maximum chunksize we attempt to allocate from storage. Making this too large
may cause delays and storage fragmentation.
first_byte_timeout
• Units: s
• Default: 60
Default timeout for receiving first byte from backend. We only wait for this many
seconds for the first byte before giving up. A value of 0 means it will never time
out. VCL can override this default value for each backend and backend request. This
parameter does not apply to pipe.
group
• Default: magic
• Flags: must_restart
The unprivileged group to run as.
gzip_level
• Default: 6
Gzip compression level: 0=debug, 1=fast, 9=best
gzip_memlevel
• Default: 8
Gzip memory level 1=slow/least, 9=fast/most compression. Memory impact is 1=1k,
2=2k, ... 9=256k.
gzip_stack_buffer
• Units: Bytes
• Default: 32768
• Flags: experimental
Size of stack buffer used for gzip processing. The stack buffers are used for
in-transit data, for instance gunzip'ed data being sent to a client.Making this
space to small results in more overhead, writes to sockets etc, making it too big
is probably just a waste of memory.
gzip_tmp_space
• Default: 0
• Flags: experimental
Where temporary space for gzip/gunzip is allocated:
0 - malloc
1 - session workspace
2 - thread workspace
System Message: WARNING/2 (../../doc/sphinx/reference/params.rst:, line 207)
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If you have much gzip/gunzip activity, it may be an advantage to use workspace for
these allocations to reduce malloc activity. Be aware that gzip needs 256+KB and
gunzip needs 32+KB of workspace (64+KB if ESI processing).
gzip_window
• Default: 15
Gzip window size 8=least, 15=most compression. Memory impact is 8=1k, 9=2k, ...
15=128k.
http_gzip_support
• Units: bool
• Default: on
• Flags: experimental
Enable gzip support. When enabled Varnish will compress uncompressed objects before
they are stored in the cache. If a client does not support gzip encoding Varnish
will uncompress compressed objects on demand. Varnish will also rewrite the
Accept-Encoding header of clients indicating support for gzip to:
System Message: WARNING/2 (../../doc/sphinx/reference/params.rst:, line 222)
Literal block expected; none found.
Accept-Encoding: gzip
Clients that do not support gzip will have their Accept-Encoding header removed.
For more information on how gzip is implemented please see the chapter on gzip in
the Varnish reference.
http_max_hdr
• Units: header lines
• Default: 64
Maximum number of HTTP headers we will deal with in client request or backend
reponses. Note that the first line occupies five header fields. This paramter
does not influence storage consumption, objects allocate exact space for the
headers they store.
http_range_support
• Units: bool
• Default: on
Enable support for HTTP Range headers.
http_req_hdr_len
• Units: bytes
• Default: 8192
Maximum length of any HTTP client request header we will allow. The limit is
inclusive its continuation lines.
http_req_size
• Units: bytes
• Default: 32768
Maximum number of bytes of HTTP client request we will deal with. This is a limit
on all bytes up to the double blank line which ends the HTTP request. The memory
for the request is allocated from the client workspace (param: workspace_client)
and this parameter limits how much of that the request is allowed to take up.
http_resp_hdr_len
• Units: bytes
• Default: 8192
Maximum length of any HTTP backend response header we will allow. The limit is
inclusive its continuation lines.
http_resp_size
• Units: bytes
• Default: 32768
Maximum number of bytes of HTTP backend resonse we will deal with. This is a limit
on all bytes up to the double blank line which ends the HTTP request. The memory
for the request is allocated from the thread pool workspace (param:
thread_pool_workspace) and this parameter limits how much of that the request is
allowed to take up.
idle_send_timeout
• Units: seconds
• Default: 60
• Flags: delayed
Time to wait with no data sent. If no data has been transmitted in this many
seconds the session is closed. See setsockopt(2) under SO_SNDTIMEO for more
information.
listen_address
• Default: :80
• Flags: must_restart
Whitespace separated list of network endpoints where Varnish will accept requests.
Possible formats: host, host:port, :port
listen_depth
• Units: connections
• Default: 1024
• Flags: must_restart
Listen queue depth.
log_hashstring
• Units: bool
• Default: on
Log the hash string components to shared memory log.
log_local_address
• Units: bool
• Default: off
Log the local address on the TCP connection in the SessionOpen shared memory
record.
lru_interval
• Units: seconds
• Default: 2
• Flags: experimental
Grace period before object moves on LRU list. Objects are only moved to the front
of the LRU list if they have not been moved there already inside this timeout
period. This reduces the amount of lock operations necessary for LRU list access.
max_esi_depth
• Units: levels
• Default: 5
Maximum depth of esi:include processing.
max_restarts
• Units: restarts
• Default: 4
Upper limit on how many times a request can restart. Be aware that restarts are
likely to cause a hit against the backend, so don't increase thoughtlessly.
nuke_limit
• Units: allocations
• Default: 50
• Flags: experimental
Maximum number of objects we attempt to nuke in orderto make space for a object
body.
pcre_match_limit
• Default: 10000
The limit for the number of internal matching function calls in a pcre_exec()
execution.
pcre_match_limit_recursion
• Default: 10000
The limit for the number of internal matching function recursions in a pcre_exec()
execution.
ping_interval
• Units: seconds
• Default: 3
• Flags: must_restart
Interval between pings from parent to child. Zero will disable pinging entirely,
which makes it possible to attach a debugger to the child.
pipe_timeout
• Units: seconds
• Default: 60
Idle timeout for PIPE sessions. If nothing have been received in either direction
for this many seconds, the session is closed.
prefer_ipv6
• Units: bool
• Default: off
Prefer IPv6 address when connecting to backends which have both IPv4 and IPv6
addresses.
queue_max
• Units: %
• Default: 100
• Flags: experimental
Percentage permitted queue length.
This sets the ratio of queued requests to worker threads, above which sessions will
be dropped instead of queued.
rush_exponent
• Units: requests per request
• Default: 3
• Flags: experimental
How many parked request we start for each completed request on the object. NB:
Even with the implict delay of delivery, this parameter controls an exponential
increase in number of worker threads.
saintmode_threshold
• Units: objects
• Default: 10
• Flags: experimental
The maximum number of objects held off by saint mode before no further will be made
to the backend until one times out. A value of 0 disables saintmode.
send_timeout
• Units: seconds
• Default: 600
• Flags: delayed
Send timeout for client connections. If the HTTP response hasn't been transmitted
in this many seconds the session is closed. See setsockopt(2) under SO_SNDTIMEO
for more information.
sess_timeout
• Units: seconds
• Default: 5
Idle timeout for persistent sessions. If a HTTP request has not been received in
this many seconds, the session is closed.
session_linger
• Units: ms
• Default: 50
• Flags: experimental
How long time the workerthread lingers on the session to see if a new request
appears right away. If sessions are reused, as much as half of all reuses happen
within the first 100 msec of the previous request completing. Setting this too
high results in worker threads not doing anything for their keep, setting it too
low just means that more sessions take a detour around the waiter.
session_max
• Units: sessions
• Default: 100000
Maximum number of sessions we will allocate before just dropping connections. This
is mostly an anti-DoS measure, and setting it plenty high should not hurt, as long
as you have the memory for it.
shm_reclen
• Units: bytes
• Default: 255
Maximum number of bytes in SHM log record. Maximum is 65535 bytes.
shm_workspace
• Units: bytes
• Default: 8192
• Flags: delayed
Bytes of shmlog workspace allocated for worker threads. If too big, it wastes some
ram, if too small it causes needless flushes of the SHM workspace. These flushes
show up in stats as "SHM flushes due to overflow". Minimum is 4096 bytes.
shortlived
• Units: s
• Default: 10.0
Objects created with TTL shorter than this are always put in transient storage.
syslog_cli_traffic
• Units: bool
• Default: on
Log all CLI traffic to syslog(LOG_INFO).
thread_pool_add_delay
• Units: milliseconds
• Default: 2
Wait at least this long between creating threads.
Setting this too long results in insuffient worker threads.
Setting this too short increases the risk of worker thread pile-up.
thread_pool_add_threshold
• Units: requests
• Default: 2
• Flags: experimental
Overflow threshold for worker thread creation.
Setting this too low, will result in excess worker threads, which is generally a
bad idea.
Setting it too high results in insuffient worker threads.
thread_pool_fail_delay
• Units: milliseconds
• Default: 200
• Flags: experimental
Wait at least this long after a failed thread creation before trying to create
another thread.
Failure to create a worker thread is often a sign that the end is near, because
the process is running out of RAM resources for thread stacks. This delay tries to
not rush it on needlessly.
If thread creation failures are a problem, check that thread_pool_max is not too
high.
It may also help to increase thread_pool_timeout and thread_pool_min, to reduce the
rate at which treads are destroyed and later recreated.
thread_pool_max
• Units: threads
• Default: 500
• Flags: delayed, experimental
The maximum number of worker threads in each pool.
Do not set this higher than you have to, since excess worker threads soak up RAM
and CPU and generally just get in the way of getting work done.
thread_pool_min
• Units: threads
• Default: 5
• Flags: delayed, experimental
The minimum number of worker threads in each pool.
Increasing this may help ramp up faster from low load situations where threads have
expired.
Minimum is 2 threads.
thread_pool_purge_delay
• Units: milliseconds
• Default: 1000
• Flags: delayed, experimental
Wait this long between purging threads.
This controls the decay of thread pools when idle(-ish).
Minimum is 100 milliseconds.
thread_pool_stack
• Units: bytes
• Default: -1
• Flags: experimental
Worker thread stack size. On 32bit systems you may need to tweak this down to fit
many threads into the limited address space.
thread_pool_timeout
• Units: seconds
• Default: 300
• Flags: delayed, experimental
Thread idle threshold.
Threads in excess of thread_pool_min, which have been idle for at least this long
are candidates for purging.
Minimum is 1 second.
thread_pool_workspace
• Units: bytes
• Default: 65536
• Flags: delayed
Bytes of HTTP protocol workspace allocated for worker threads. This space must be
big enough for the backend request and responses, and response to the client plus
any other memory needs in the VCL code.Minimum is 1024 bytes.
thread_pools
• Units: pools
• Default: 2
• Flags: delayed, experimental
Number of worker thread pools.
Increasing number of worker pools decreases lock contention.
Too many pools waste CPU and RAM resources, and more than one pool for each CPU is
probably detrimal to performance.
Can be increased on the fly, but decreases require a restart to take effect.
thread_stats_rate
• Units: requests
• Default: 10
• Flags: experimental
Worker threads accumulate statistics, and dump these into the global stats counters
if the lock is free when they finish a request. This parameters defines the
maximum number of requests a worker thread may handle, before it is forced to dump
its accumulated stats into the global counters.
user
• Default: magic
• Flags: must_restart
The unprivileged user to run as. Setting this will also set "group" to the
specified user's primary group.
vcc_err_unref
• Units: bool
• Default: on
Unreferenced VCL objects result in error.
vcl_dir
• Default: /usr/local/etc/varnish
Directory from which relative VCL filenames (vcl.load and include) are opened.
vcl_trace
• Units: bool
• Default: off
Trace VCL execution in the shmlog. Enabling this will allow you to see the path
each request has taken through the VCL program. This generates a lot of logrecords
so it is off by default.
vmod_dir
• Default: /usr/local/lib/varnish/vmods
Directory where VCL modules are to be found.
waiter
• Default: default
• Flags: must_restart, experimental
Select the waiter kernel interface.
SEE ALSO
• varnish-cli(7)
• varnishlog(1)
• varnishhist(1)
• varnishncsa(1)
• varnishstat(1)
• varnishtop(1)
• vcl(7)
HISTORY
The varnishd daemon was developed by Poul-Henning Kamp in cooperation with Verdens Gang
AS, Varnish Software AS and Varnish Software.
This manual page was written by Dag-Erling Smørgrav with updates by Stig Sandbeck Mathisen
⟨ssm@debian.org⟩
COPYRIGHT
This document is licensed under the same licence as Varnish itself. See LICENCE for
details.
• Copyright (c) 2007-2011 Varnish Software AS
AUTHOR
Dag-Erling Smørgrav, Stig Sandbeck Mathisen, Per Buer