# The Linux version of Redis relies on the system call fork() to perform

# point-in-time snapshots of the heap. In addition to the AOF and RDB backup

# mechanism, the master-slave synchronization and clustering features are

# dependent on this behavior of fork(). In order for the Windows version to

# perform like the Linux version we had to simulate this aspect of fork().

# Doing so meant moving the Redis heap into a memory mapped file that can

# be shared with a child process.

#

# *** There must be disk space available for this file in order for Redis

# to launch. *** The default configuration places this file in the local

# appdata directory. If you wish to move this file to another local disk,

# use the heapdir flag as described below.

#

# The maxheap flag controls the maximum size of this memory mapped file,

# as well as the total usable space for the Redis heap. Running Redis

# without either maxheap or maxmemory will result in a memory mapped file

# being created that is equal to the size of physical memory. During

# fork() operations the total page file commit will max out at around:

#

#    (size of physical memory) + (2 * size of maxheap)

#

# For instance, on a machine with 8GB of physical RAM, the max page file

# commit with the default maxheap size will be (8)+(2*8) GB , or 24GB. The

# default page file sizing of Windows will allow for this without having

# to reconfigure the system. Larger heap sizes are possible, but the maximum

# page file size will have to be increased accordingly.

#

# The Redis heap must be larger than the value specified by the maxmemory

# flag, as the heap allocator has its own memory requirements and

# fragmentation of the heap is inevitable. If only the maxmemory flag is

# specified, maxheap will be set at 1.5*maxmemory. If the maxheap flag is

# specified along with maxmemory, the maxheap flag will be automatically

# increased if it is smaller than 1.5*maxmemory.

#

# maxheap <bytes>

# The heap memory mapped file must reside on a local path for heap sharing

# between processes to work. A UNC path will not suffice here. For maximum

# performance this should be located on the fastest local drive available.

# This value defaults to the local application data folder(e.g.,

# "%USERPROFILE%\AppData\Local"). Since this file can be very large, you

# may wish to place this on a drive other than the one the operating system

# is installed on.

#

# Note that you must specify a directory here, not a file name.

# heapdir <directory path(absolute or relative)>

heapdir ./

redis-server.exe  redis.windows.conf

redis-server --service-install redis.windows.conf