两个filer分别起了两个mount服务挂载，结果两个路径显示的文件列表不一致

[Leif160519]

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#1005
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#1008

Describe the bug
为了实现filer的高可用，我启动了两个filer服务，然后每个filer我也分别启动了mount服务，分别挂载到了本地，但是当我在其中一个挂载点里新建文件时，另外一个挂载点并不能同步第一个挂载点里新增的那个文件，但如果是在浏览器中随机选择一个filer进行上传文件的话，两个挂载点都能看到相同的文件列表。两个filer用的都是redis作为元数据的存储介质，然而在浏览器端查看两个filer，他们的数据列表都是一致的

System Setup
filer1.service

/usr/local/bin/weed -logdir=/seaweedfs/log/filer1 filer -master=10.5.2.222:9331,10.5.2.222:9332,10.5.2.222:9333 -port=8888 -defaultReplicaPlacement=001

filer2.service

/usr/local/bin/weed -logdir=/seaweedfs/log/filer2 filer -master=10.5.2.222:9331,10.5.2.222:9332,10.5.2.222:9333 -port=8889 -defaultReplicaPlacement=001

mount1.service

/usr/local/bin/weed -logdir=/seaweedfs/log/mount1 mount -filer=10.5.2.222:8888 -dir=/seaweedfs/mount1

mount2,service

/usr/local/bin/weed -logdir=/seaweedfs/log/mount2 mount -filer=10.5.2.222:8889 -dir=/seaweedfs/mount2

root@ubuntu:/seaweedfs/mount1# ll
total 0
drwxr-xr-- 1 root root 0 Aug 11 20:50 topics/
drwxr-xr-x 1 root root 0 Aug 12 03:52 1/
drwxr-xr-x 1 root root 0 Aug 12 03:55 2/

root@ubuntu:/seaweedfs/mount2# ll
total 20K
drwxr-xr-- 1 root root    0 Aug 11 20:50  topics/
drwxr-xr-x 1 root root    0 Aug 12 03:55  2/

• Ubuntu 18.04
• 1.87 a6b59d5
• if using filer, show the content of filer.toml

/etc/seaweedfs/filer.toml

# A sample TOML config file for SeaweedFS filer store
# Used with "weed filer" or "weed server -filer"
# Put this file to one of the location, with descending priority
#    ./filer.toml
#    $HOME/.seaweedfs/filer.toml
#    /etc/seaweedfs/filer.toml

####################################################
# Customizable filer server options
####################################################
[filer.options]
# with http DELETE, by default the filer would check whether a folder is empty.
# recursive_delete will delete all sub folders and files, similar to "rm -Rf"
recursive_delete = false
# directories under this folder will be automatically creating a separate bucket
buckets_folder = "/buckets"
buckets_fsync = [          # a list of buckets with all write requests fsync=true
	"important_bucket",
	"should_always_fsync",
]

####################################################
# The following are filer store options
####################################################

[leveldb2]
# local on disk, mostly for simple single-machine setup, fairly scalable
# faster than previous leveldb, recommended.
enabled = false
dir = "."					# directory to store level db files

[mysql]  # or tidb
# CREATE TABLE IF NOT EXISTS filemeta (
#   dirhash     BIGINT         COMMENT 'first 64 bits of MD5 hash value of directory field',
#   name        VARCHAR(1000)  COMMENT 'directory or file name',
#   directory   TEXT           COMMENT 'full path to parent directory',
#   meta        LONGBLOB,
#   PRIMARY KEY (dirhash, name)
# ) DEFAULT CHARSET=utf8;

enabled = false
hostname = "localhost"
port = 3306
username = "root"
password = ""
database = ""              # create or use an existing database
connection_max_idle = 2
connection_max_open = 100
interpolateParams = false

[postgres] # or cockroachdb
# CREATE TABLE IF NOT EXISTS filemeta (
#   dirhash     BIGINT,
#   name        VARCHAR(65535),
#   directory   VARCHAR(65535),
#   meta        bytea,
#   PRIMARY KEY (dirhash, name)
# );
enabled = false
hostname = "localhost"
port = 5432
username = "postgres"
password = ""
database = ""              # create or use an existing database
sslmode = "disable"
connection_max_idle = 100
connection_max_open = 100

[cassandra]
# CREATE TABLE filemeta (
#    directory varchar,
#    name varchar,
#    meta blob,
#    PRIMARY KEY (directory, name)
# ) WITH CLUSTERING ORDER BY (name ASC);
enabled = false
keyspace="seaweedfs"
hosts=[
	"localhost:9042",
]

[redis2]
enabled = true
address  = "localhost:6379"
password = ""
database = 0

[redis_cluster2]
enabled = false
addresses = [
    "localhost:30001",
    "localhost:30002",
    "localhost:30003",
    "localhost:30004",
    "localhost:30005",
    "localhost:30006",
]
password = ""
# allows reads from slave servers or the master, but all writes still go to the master
readOnly = true
# automatically use the closest Redis server for reads
routeByLatency = true

[etcd]
enabled = false
servers = "localhost:2379"
timeout = "3s"

[mongodb]
enabled = false
uri = "mongodb://localhost:27017"
option_pool_size = 0
database = "seaweedfs"

Expected behavior
不同的挂载点，文件列表显示一致

Screenshots
由于网络策略限制，我无法上传图片

Additional context
无

[chrislusf]

this is not supported yet.

Use one filer for multiple mounts for now.

[Leif160519]

this is not supported yet.

Use one filer for multiple mounts for now.

那请问一下，filer服务的高可用没有别的方案了吗，如果数以千万计的文件服务，下面还有数百个Linux需要挂载它，如果只有一个filer，挂掉的话就很难办了

[chrislusf]

you can mount different sub folders.

[Leif160519]

您可以装载不同的子文件夹。

那您的意思就是，整个seaweedfs只提供一个filer，然后可以用多个mount服务去挂载不同的路径对嘛

[chrislusf]

you can start multiple filers. But each mount only mount one folder not shared with each other.

[Leif160519]

您可以启动多个文件管理器。但是每个挂载只挂载一个不共享的文件夹。

好的，我明白了您的意思，谢谢！

[xpader]

2024 年了，现在可以共享挂载了吗？

[lfhy]

2024 年了，现在可以共享挂载了吗？

视图是一致的吧，mount服务会订阅filer变更，当触发元数据更新的时候也会更新mount本地的元数据缓存