FastDFS Storage端配置文件详解及启动注意事项

不多说，直接上代码

# is this config file disabled
# false for enabled
# true for disabled
disabled=false
#当前配置文件是否不可用false可用，true不可用

# the name of the group this storage server belongs to
group_name=group1
#当前storage服务器处于哪个组group1组名

# bind an address of this host
# empty for bind all addresses of this host
bind_addr=
#绑定哪个IP地址，一个服务器上会有多个网卡，多个地址，具体使用哪个

# if bind an address of this host when connect to other servers 
# (this storage server as a client)
# true for binding the address configed by above parameter: "bind_addr"
# false for binding any address of this host
client_bind=true
#bind_addr绑定IP后此参数才有用
#本storage server作为client连接其他服务器（如tracker server、其他storage server），是否绑定bind_addr。

# the storage server port
port=23000
#storage server的端口

# connect timeout in seconds
# default value is 30s
connect_timeout=30
#连接超时时间，单位秒

# network timeout in seconds
# default value is 30s
network_timeout=60
#网络超时时间，单位秒
#发送或接收数据时，如果在超时时间后还不能发送或接收数据，则本次网络通信失败。

# heart beat interval in seconds
heart_beat_interval=30
#心跳包发送周期，单位秒

# disk usage report interval in seconds
stat_report_interval=60
#storage server向tracker server报告磁盘剩余空间的时间间隔，单位为秒。

# the base path to store data and log files
base_path=/home/fdfs
#文件及日志保存路径

# max concurrent connections the server supported
# default value is 256
# more max_connections means more memory will be used
max_connections=256
#最大连接数

# the buff size to recv / send data
# this parameter must more than 8KB
# default value is 64KB
# since V2.00
buff_size = 256KB
#缓冲区大小

# work thread count, should <= max_connections
# work thread deal network io
# default value is 4
# since V2.00
work_threads=4
#工作线程数

# if disk read / write separated
##  false for mixed read and write
##  true for separated read and write
# default value is true
# since V2.00
disk_rw_separated = true
#磁盘IO读写是否分离，缺省是分离的。

# disk reader thread count per store base path
# for mixed read / write, this parameter can be 0
# default value is 1
# since V2.00
disk_reader_threads = 1
#针对单个存储路径的读线程数，缺省值为1。
#读写分离时，系统中的读线程数 = disk_reader_threads * store_path_count
#读写混合时，系统中的读写线程数 = (disk_reader_threads + disk_writer_threads) * store_path_count

# disk writer thread count per store base path
# for mixed read / write, this parameter can be 0
# default value is 1
# since V2.00
disk_writer_threads = 1
#针对单个存储路径的写线程数，缺省值为1。
#读写分离时，系统中的写线程数 = disk_writer_threads * store_path_count
#读写混合时，系统中的读写线程数 = (disk_reader_threads + disk_writer_threads) * store_path_count

# when no entry to sync, try read binlog again after X milliseconds
# must > 0, default value is 200ms
sync_wait_msec=50
#同步文件时，如果从binlog中没有读到要同步的文件，休眠N毫秒后重新读取。0表示不休眠，立即再次尝试读取。
#出于CPU消耗考虑，不建议设置为0。如何希望同步尽可能快一些，可以将本参数设置得小一些，比如设置为10ms

# after sync a file, usleep milliseconds
# 0 for sync successively (never call usleep)
sync_interval=0
#同步上一个文件后，再同步下一个文件的时间间隔，单位为毫秒，0表示不休眠，直接同步下一个文件。

# storage sync start time of a day, time format: Hour:Minute
# Hour from 0 to 23, Minute from 0 to 59
sync_start_time=00:00
#同步开始时间

# storage sync end time of a day, time format: Hour:Minute
# Hour from 0 to 23, Minute from 0 to 59
sync_end_time=23:59
#同步结束时间

# write to the mark file after sync N files
# default value is 500
write_mark_file_freq=500
#同步完N个文件后，把storage的mark文件同步到磁盘

# path(disk or mount point) count, default value is 1
store_path_count=1
#存放文件时storage server支持多个路径（例如磁盘）。这里配置存放文件的基路径数目，通常只配一个目录。

# store_path#, based 0, if store_path0 not exists, it's value is base_path
# the paths must be exist
store_path0=/home/fdfs
#store_path1=/home/yuqing/fastdfs2
#逐一配置store_path个路径，索引号基于0。注意配置方法后面有0,1,2 ......，需要配置0到store_path - 1。
#如果不配置base_path0，那边它就和base_path对应的路径一样。

# subdir_count  * subdir_count directories will be auto created under each 
# store_path (disk), value can be 1 to 256, default value is 256
subdir_count_per_path=256
#FastDFS存储文件时，采用了两级目录。这里配置存放文件的目录个数 (系统的存储机制,大家看看文件存储的目录就知道了)
#如果本参数只为N（如：256），那么storage server在初次运行时，会自动创建 N * N 个存放文件的子目录。

# tracker_server can ocur more than once, and tracker_server format is
#  "host:port", host can be hostname or ip address
tracker_server=192.168.1.201:22122
#tracker_server 的列表
#有多个tracker server时，每个tracker server写一行

#standard log level as syslog, case insensitive, value list:
### emerg for emergency
### alert
### crit for critical
### error
### warn for warning
### notice
### info
### debug
log_level=info
#系统日志级别

#unix group name to run this program, 
#not set (empty) means run by the group of current user
run_by_group=
#使用那个系统用户组运行FastDFS，默认为启动线程的用户组

#unix username to run this program,
#not set (empty) means run by current user
run_by_user=
#使用那个系统用户运行FastDFS。默认为启动线程的用户

# allow_hosts can ocur more than once, host can be hostname or ip address,
# "*" means match all ip addresses, can use range like this: 10.0.1.[1-15,20] or
# host[01-08,20-25].domain.com, for example:
# allow_hosts=10.0.1.[1-15,20]
# allow_hosts=host[01-08,20-25].domain.com
allow_hosts=*
#设置可以连接当前storage server的IP范围，包括client和store_server

# the mode of the files distributed to the data path
# 0: round robin(default)
# 1: random, distributted by hash code
file_distribute_path_mode=0
#文件在data目录下分散存储策略。
#0: 轮流存放，在一个目录下存储设置的文件数后（参数file_distribute_rotate_count中设置文件数），使用下一个目录进行存储。
#1: 随机存储，根据文件名对应的hash code来分散存储。

# valid when file_distribute_to_path is set to 0 (round robin), 
# when the written file count reaches this number, then rotate to next path
# default value is 100
file_distribute_rotate_count=100
# 当上面的参数file_distribute_path_mode配置为0（轮流存放方式）时，本参数有效。
# 当一个目录下的文件存放的文件数达到本参数值时，后续上传的文件存储到下一个目录中。

# call fsync to disk when write big file
# 0: never call fsync
# other: call fsync when written bytes >= this bytes
# default value is 0 (never call fsync)
fsync_after_written_bytes=0
#当写入大文件时，每写入N个字节，调用一次系统函数fsync将内容强行同步到硬盘。0表示从不调用fsync 

# sync log buff to disk every interval seconds
# must > 0, default value is 10 seconds
sync_log_buff_interval=10
#同步或刷新日志信息到硬盘的时间间隔，单位为秒
#注意：storage server 的日志信息不是时时写硬盘的，而是先写内存。

# sync binlog buff / cache to disk every interval seconds
# default value is 60 seconds
sync_binlog_buff_interval=10
#同步binglog（更新操作日志）到硬盘的时间间隔，单位为秒
#本参数会影响新上传文件同步延迟时间

# sync storage stat info to disk every interval seconds
# default value is 300 seconds
sync_stat_file_interval=300
#把storage的stat文件同步到磁盘的时间间隔，单位为秒。
#注：如果stat文件内容没有变化，不会进行同步

# thread stack size, should >= 512KB
# default value is 512KB
thread_stack_size=512KB
#线程栈的大小。FastDFS server端采用了线程方式。

# the priority as a source server for uploading file.
# the lower this value, the higher its uploading priority.
# default value is 10
upload_priority=10
#本storage server作为源服务器，上传文件的优先级，可以为负数。值越小，优先级越高。这里就和 tracker.conf 中store_server= 2时的配置相对应了

# the NIC alias prefix, such as eth in Linux, you can see it by ifconfig -a
# multi aliases split by comma. empty value means auto set by OS type
# default values is empty
if_alias_prefix=

# if check file duplicate, when set to true, use FastDHT to store file indexes
# 1 or yes: need check
# 0 or no: do not check
# default value is 0
check_file_duplicate=0
#是否检测上传文件已经存在。如果已经存在，则不存在文件内容，建立一个符号链接以节省磁盘空间。 
#这个应用要配合FastDHT 使用，所以打开前要先安装FastDHT 
#1或yes 是检测，0或no 是不检测

# file signature method for check file duplicate
## hash: four 32 bits hash code
## md5: MD5 signature
# default value is hash
# since V4.01
file_signature_method=hash
#文件去重时，文件内容的签名方式：
## hash： 4个hash code
## md5：MD5

# namespace for storing file indexes (key-value pairs)
# this item must be set when check_file_duplicate is true / on
key_namespace=FastDFS
#当上个参数设定为1 或 yes时 (true/on也是可以的) ， 在FastDHT中的命名空间。

# set keep_alive to 1 to enable persistent connection with FastDHT servers
# default value is 0 (short connection)
keep_alive=0
#与FastDHT servers 的连接方式 (是否为持久连接) ，默认是0（短连接方式）。可以考虑使用长连接，这要看FastDHT server的连接数是否够用。

# you can use "#include filename" (not include double quotes) directive to 
# load FastDHT server list, when the filename is a relative path such as 
# pure filename, the base path is the base path of current/this config file.
# must set FastDHT server list when check_file_duplicate is true / on
# please see INSTALL of FastDHT for detail
##include /home/yuqing/fastdht/conf/fdht_servers.conf

# if log to access log
# default value is false
# since V4.00
use_access_log = false
#是否将文件操作记录到access log

# if rotate the access log every day
# default value is false
# since V4.00
rotate_access_log = false
#是否定期轮转access log，目前仅支持一天轮转一次

# rotate access log time base, time format: Hour:Minute
# Hour from 0 to 23, Minute from 0 to 59
# default value is 00:00
# since V4.00
access_log_rotate_time=00:00
#access log定期轮转的时间点，只有当rotate_access_log设置为true时有效

# if rotate the error log every day
# default value is false
# since V4.02
rotate_error_log = false
#是否定期轮转error log，目前仅支持一天轮转一次

# rotate error log time base, time format: Hour:Minute
# Hour from 0 to 23, Minute from 0 to 59
# default value is 00:00
# since V4.02
error_log_rotate_time=00:00
#error log定期轮转的时间点，只有当rotate_error_log设置为true时有效

# rotate access log when the log file exceeds this size
# 0 means never rotates log file by log file size
# default value is 0
# since V4.02
rotate_access_log_size = 0
# access log按文件大小轮转
# 设置为0表示不按文件大小轮转，否则当access log达到该大小，就会轮转到新文件中

# rotate error log when the log file exceeds this size
# 0 means never rotates log file by log file size
# default value is 0
# since V4.02
rotate_error_log_size = 0
# error log按文件大小轮转
# 设置为0表示不按文件大小轮转，否则当error log达到该大小，就会轮转到新文件中

# if skip the invalid record when sync file
# default value is false
# since V4.02
file_sync_skip_invalid_record=false
# 文件同步的时候，是否忽略无效的binlog记录

# if use connection pool
# default value is false
# since V4.05
use_connection_pool = false

# connections whose the idle time exceeds this time will be closed
# unit: second
# default value is 3600
# since V4.05
connection_pool_max_idle_time = 3600

# use the ip address of this storage server if domain_name is empty,
# else this domain name will ocur in the url redirected by the tracker server
http.domain_name=

# the port of the web server on this storage server
http.server_port=8888

注意事项与Tracker端一样，