MogileFS DB 表结构
MogileFS数据库使用Innodb数据引擎
以下是所有表：
+----------------------+
|?Tables_in_mogilefs???|
+----------------------+
|?class????????????????|?
|?device???????????????|?
|?domain???????????????|?
|?file?????????????????|?
|?file_on??????????????|?
|?file_on_corrupt??????|?
|?file_to_delete???????|?
|?file_to_delete2??????|?
|?file_to_delete_later?|?
|?file_to_queue????????|?
|?file_to_replicate????|?
|?fsck_log?????????????|?
|?host?????????????????|?
|?server_settings??????|?
|?tempfile?????????????|?
|?unreachable_fids?????|?
+----------------------+
domain（域）：用于记录域信息
+-----------+----------------------+------+-----+---------+-------+
|?Field?????|?Type?????????????????|?Null?|?Key?|?Default?|?Extra?|
+-----------+----------------------+------+-----+---------+-------+
|?dmid??????|?smallint(5)?unsigned?|?NO???|?PRI?|?NULL????|???????|?
|?namespace?|?varchar(255)?????????|?YES??|?UNI?|?NULL????|???????|?
+-----------+----------------------+------+-----+---------+-------+
class（类）：用于记录各域中的类信息，对每个类可定义不同的备份策略
+-------------+----------------------+------+-----+---------+-------+
|?Field???????|?Type?????????????????|?Null?|?Key?|?Default?|?Extra?|
+-------------+----------------------+------+-----+---------+-------+
|?dmid????????|?smallint(5)?unsigned?|?NO???|?PRI?|?NULL????|???????|?
|?classid?????|?tinyint(3)?unsigned??|?NO???|?PRI?|?NULL????|???????|?
|?classname???|?varchar(50)??????????|?YES??|?????|?NULL????|???????|?
|?mindevcount?|?tinyint(3)?unsigned??|?NO???|?????|?NULL????|???????|?
|?replpolicy??|?varchar(255)?????????|?YES??|?????|?NULL????|???????|?
+-------------+----------------------+------+-----+---------+-------+
host（存储节点）：用于记录各存储节点状态和访问的ip和端口等
+---------------+-----------------------------+------+-----+---------+-------+
|?Field?????????|?Type????????????????????????|?Null?|?Key?|?Default?|?Extra?|
+---------------+-----------------------------+------+-----+---------+-------+
|?hostid????????|?mediumint(8)?unsigned???????|?NO???|?PRI?|?NULL????|???????|?
|?status????????|?enum('alive','dead','down')?|?YES??|?????|?NULL????|???????|?
|?http_port?????|?mediumint(8)?unsigned???????|?YES??|?????|?7500????|???????|?
|?http_get_port?|?mediumint(8)?unsigned???????|?YES??|?????|?NULL????|???????|?
|?hostname??????|?varchar(40)?????????????????|?YES??|?UNI?|?NULL????|???????|?
|?hostip????????|?varchar(15)?????????????????|?YES??|?UNI?|?NULL????|???????|?
|?altip?????????|?varchar(15)?????????????????|?YES??|?UNI?|?NULL????|???????|?
|?altmask???????|?varchar(18)?????????????????|?YES??|?????|?NULL????|???????|?
+---------------+-----------------------------+------+-----+---------+-------+
device（设备块）：用于记录各Host中的设备块信息，如总共多大，使用了多少空间，当前设备状态等
+----------+------------------------------------------------+------+-----+---------+-------+
|?Field????|?Type???????????????????????????????????????????|?Null?|?Key?|?Default?|?Extra?|
+----------+------------------------------------------------+------+-----+---------+-------+
|?devid????|?mediumint(8)?unsigned??????????????????????????|?NO???|?PRI?|?NULL????|???????|?
|?hostid???|?mediumint(8)?unsigned??????????????????????????|?NO???|?????|?NULL????|???????|?
|?status???|?enum('alive','dead','down','readonly','drain')?|?YES??|?MUL?|?NULL????|???????|?
|?weight???|?mediumint(9)???????????????????????????????????|?YES??|?????|?100?????|???????|?
|?mb_total?|?mediumint(8)?unsigned??????????????????????????|?YES??|?????|?NULL????|???????|?
|?mb_used??|?mediumint(8)?unsigned??????????????????????????|?YES??|?????|?NULL????|???????|?
|?mb_asof??|?int(10)?unsigned???????????????????????????????|?YES??|?????|?NULL????|???????|?
+----------+------------------------------------------------+------+-----+---------+-------+
server_settings（服务器设置）：服务器的一些配置信息，主要用于记录MogileFS系统执行fsck的相关记录，fsck操作会根据当前mogileFS的备份策略进行文件的备份检查
+--------------------------+----------+
|?field????????????????????|?value????|
+--------------------------+----------+
|?fsck_fids_checked????????|?0????????|?
|?fsck_fid_at_end??????????|?23972852?|?
|?fsck_highest_fid_checked?|?0????????|?
|?fsck_logid_processed?????|?6244097??|?
|?fsck_start_fid???????????|?1121081??|?
|?fsck_start_maxlogid??????|?6244097??|?
|?internal_queue_limit?????|?500??????|?
|?queue_rate_for_fsck??????|?2000?????|?
|?queue_size_for_fsck??????|?20000????|?
|?schema_version???????????|?12???????|?
+--------------------------+----------+
fsck_log（fsck日志记录）：mogileFS执行fsck时的具体操作记录（具体对某个fid文件进行的操作）
+--------+-----------------------+------+-----+---------+----------------+
|?Field??|?Type??????????????????|?Null?|?Key?|?Default?|?Extra??????????|
+--------+-----------------------+------+-----+---------+----------------+
|?logid??|?int(10)?unsigned??????|?NO???|?PRI?|?NULL????|?auto_increment?|?
|?utime??|?int(10)?unsigned??????|?NO???|?MUL?|?NULL????|????????????????|?
|?fid????|?int(10)?unsigned??????|?YES??|?????|?NULL????|????????????????|?
|?evcode?|?char(4)???????????????|?YES??|?????|?NULL????|????????????????|?
|?devid??|?mediumint(8)?unsigned?|?YES??|?????|?NULL????|????????????????|?
+--------+-----------------------+------+-----+---------+----------------+
unreachable_fids（不可达的fid）：不可到达的文件列表
+------------+------------------+------+-----+---------+-------+
|?Field??????|?Type?????????????|?Null?|?Key?|?Default?|?Extra?|
+------------+------------------+------+-----+---------+-------+
|?fid????????|?int(10)?unsigned?|?NO???|?PRI?|?NULL????|???????|?
|?lastupdate?|?int(10)?unsigned?|?NO???|?MUL?|?NULL????|???????|?
+------------+------------------+------+-----+---------+-------+
tempfile（不可达的fid）：复制的临时文件信息
+------------+----------------------+------+-----+---------+----------------+
|?Field??????|?Type?????????????????|?Null?|?Key?|?Default?|?Extra??????????|
+------------+----------------------+------+-----+---------+----------------+
|?fid????????|?int(10)?unsigned?????|?NO???|?PRI?|?NULL????|?auto_increment?|?
|?createtime?|?int(10)?unsigned?????|?NO???|?????|?NULL????|????????????????|?
|?classid????|?tinyint(3)?unsigned??|?NO???|?????|?NULL????|????????????????|?
|?dmid???????|?smallint(5)?unsigned?|?NO???|?????|?NULL????|????????????????|?
|?dkey???????|?varchar(255)?????????|?YES??|?????|?NULL????|????????????????|?
|?devids?????|?varchar(60)??????????|?YES??|?????|?NULL????|????????????????|?
+------------+----------------------+------+-----+---------+----------------+
file（文件基本信息）：记录文件的基本信息，属于哪个域，哪个类，fid对应的dkey、文件大小以及记录该文件的复制份数是多少
+----------+----------------------+------+-----+---------+-------+
|?Field????|?Type?????????????????|?Null?|?Key?|?Default?|?Extra?|
+----------+----------------------+------+-----+---------+-------+
|?fid??????|?int(10)?unsigned?????|?NO???|?PRI?|?NULL????|???????|?
|?dmid?????|?smallint(5)?unsigned?|?NO???|?MUL?|?NULL????|???????|?
|?dkey?????|?varchar(255)?????????|?YES??|?????|?NULL????|???????|?
|?length???|?bigint(20)?unsigned??|?YES??|?????|?NULL????|???????|?
|?classid??|?tinyint(3)?unsigned??|?NO???|?????|?NULL????|???????|?
|?devcount?|?tinyint(3)?unsigned??|?NO???|?????|?NULL????|???????|?
+----------+----------------------+------+-----+---------+-------+
file_on（文件所在设备）：记录每个fid文件在什么设备上，一个fid文件同时存储在多个设备上，则各有一条记录
+-------+-----------------------+------+-----+---------+-------+
|?Field?|?Type??????????????????|?Null?|?Key?|?Default?|?Extra?|
+-------+-----------------------+------+-----+---------+-------+
|?fid???|?int(10)?unsigned??????|?NO???|?PRI?|?NULL????|???????|?
|?devid?|?mediumint(8)?unsigned?|?NO???|?PRI?|?NULL????|???????|?
+-------+-----------------------+------+-----+---------+-------+
file_on_corrupt（损坏的文件）：记录哪一个文件在哪个设备上损坏了
+-------+-----------------------+------+-----+---------+-------+
|?Field?|?Type??????????????????|?Null?|?Key?|?Default?|?Extra?|
+-------+-----------------------+------+-----+---------+-------+
|?fid???|?int(10)?unsigned??????|?NO???|?PRI?|?NULL????|???????|?
|?devid?|?mediumint(8)?unsigned?|?NO???|?PRI?|?NULL????|???????|?
+-------+-----------------------+------+-----+---------+-------+
file_to_delete（要删除的文件）：记录哪些文件需要删除
+-------+------------------+------+-----+---------+-------+
|?Field?|?Type?????????????|?Null?|?Key?|?Default?|?Extra?|
+-------+------------------+------+-----+---------+-------+
|?fid???|?int(10)?unsigned?|?NO???|?PRI?|?NULL????|???????|?
+-------+------------------+------+-----+---------+-------+
file_to_delete2（要删除的文件）：记录删除失败的文件以及再次尝试的时间和失败的总次数
+-----------+---------------------+------+-----+---------+-------+
|?Field?????|?Type????????????????|?Null?|?Key?|?Default?|?Extra?|
+-----------+---------------------+------+-----+---------+-------+
|?fid???????|?int(10)?unsigned????|?NO???|?PRI?|?NULL????|???????|?
|?nexttry???|?int(10)?unsigned????|?NO???|?MUL?|?NULL????|???????|?
|?failcount?|?tinyint(3)?unsigned?|?NO???|?????|?0???????|???????|?
+-----------+---------------------+------+-----+---------+-------+
file_to_delete_later（要延迟删除的文件）：记录要延迟删除的文件
+----------+------------------+------+-----+---------+-------+
|?Field????|?Type?????????????|?Null?|?Key?|?Default?|?Extra?|
+----------+------------------+------+-----+---------+-------+
|?fid??????|?int(10)?unsigned?|?NO???|?PRI?|?NULL????|???????|?
|?delafter?|?int(10)?unsigned?|?NO???|?MUL?|?NULL????|???????|?
+----------+------------------+------+-----+---------+-------+
file_to_queue（当前排队的文件）：不详
+-----------+----------------------+------+-----+---------+-------+
|?Field?????|?Type?????????????????|?Null?|?Key?|?Default?|?Extra?|
+-----------+----------------------+------+-----+---------+-------+
|?fid???????|?int(10)?unsigned?????|?NO???|?PRI?|?NULL????|???????|?
|?devid?????|?int(10)?unsigned?????|?YES??|?????|?NULL????|???????|?
|?type??????|?tinyint(3)?unsigned??|?NO???|?PRI?|?NULL????|???????|?
|?nexttry???|?int(10)?unsigned?????|?NO???|?????|?NULL????|???????|?
|?failcount?|?tinyint(3)?unsigned??|?NO???|?????|?0???????|???????|?
|?flags?????|?smallint(5)?unsigned?|?NO???|?????|?0???????|???????|?
+-----------+----------------------+------+-----+---------+-------+
file_to_replicate（要做复制分发的文件）：要做分发的文件，记录来源设备，失败次数和下次重试的时间等信息。
+-----------+----------------------+------+-----+---------+-------+
|?Field?????|?Type?????????????????|?Null?|?Key?|?Default?|?Extra?|
+-----------+----------------------+------+-----+---------+-------+
|?fid???????|?int(10)?unsigned?????|?NO???|?PRI?|?NULL????|???????|?
|?nexttry???|?int(10)?unsigned?????|?NO???|?MUL?|?NULL????|???????|?
|?fromdevid?|?int(10)?unsigned?????|?YES??|?????|?NULL????|???????|?
|?failcount?|?tinyint(3)?unsigned??|?NO???|?????|?0???????|???????|?
|?flags?????|?smallint(5)?unsigned?|?NO???|?????|?0???????|???????|?
+-----------+----------------------+------+-----+---------+-------+
?
