radosgw 各个pool作用及联系
本节主要讲述一下radosgw中各个pool的作用，及相应的操作命令.
1. 列出所有的池
执行如下命令列出所有的池：
# rados lspools .rgw.root default.rgw.control default.rgw.data.root default.rgw.gc default.rgw.log default.rgw.users.uid default.rgw.users.keys default.rgw.buckets.index default.rgw.usage default.rgw.buckets.data default.rgw.buckets.non-ec default.rgw.users.swift default.rgw.users.email
2. 各个pool的作用
1) .rgw.root
本pool中包含realm、zonegroup和zone：
# rados -p .rgw.root ls zone_info.78b9bcbb-b328-4e4a-8417-4ed933be88bb zonegroup_info.8a40abe8-c081-4065-8aea-bd0a3745cd2c zone_names.default zonegroups_names.default
2) default.rgw.control
在RGW上电时， 在control pool创建若干个对象用于watch-notify，主要作用为当一个zone对应多个RGW且cache使能时，保证数据的一致性。其基本原理为利用librados提供的对象watch-notify功能，当有数据更新时，通知其他RGW刷新cache，后面会有文档专门描述RGW cache。
# rados -p default.rgw.control ls notify.1 notify.7 notify.5 notify.6 notify.2 notify.4 notify.3 notify.0
3) default.rgw.data.root
包含bucket和bucket元数据，bucket创建了两个对象， 一个是<bucket_name>，另一个是.bucket.meta.<bucket_name>.<marker>。这个marker是创建bucket时生成的。同时用户创建的bucket在default.rgw.buckets.index中都对应一个object对象，其命名格式为.dir.<marker>.
# rados -p default.rgw.data.root ls .bucket.meta.app_wangpan_uat_liuzy28_bucket:78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11 app_wangpan_uat_liuzy28_bucket # rados -p default.rgw.buckets.index ls .dir.78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11
4） default.rgw.gc
RGW中大文件数据一般在后台删除，该pool用于记录那些待删除的文件对象。
# rados -p default.rgw.gc ls | more gc.132 gc.597 gc.250 gc.197 gc.949 gc.650 gc.446 gc.218 gc.333 gc.1000 gc.299 gc.423 ...
5） default.rgw.log
各种log信息。
# rados -p default.rgw.log ls | more obj_delete_at_hint.0000000078 obj_delete_at_hint.0000000070 obj_delete_at_hint.0000000104 obj_delete_at_hint.0000000026 obj_delete_at_hint.0000000028 obj_delete_at_hint.0000000040 obj_delete_at_hint.0000000015 obj_delete_at_hint.0000000069 obj_delete_at_hint.0000000095 obj_delete_at_hint.0000000003 obj_delete_at_hint.0000000047
6) default.rgw.users.uid
保存用户信息和用户下的bucket信息。
# rados -p default.rgw.users.uid ls app_wangpan_uat_liuzy28.buckets app_wangpan_uat_liuzy28 # rados -p default.rgw.users.uid listomapkeys app_wangpan_uat_liuzy28.buckets app_wangpan_uat_liuzy28_bucket
上面可以看到，用户liuzy28创建了一个bucket。
7) ** default.rgw.users.keys**
包含注册用户的access_key。
# rados -p default.rgw.users.keys ls 7ACMGKB778ADFXHN4UB5 3FD061FOB9MBI3792OK6 8OGTPS5BP8D91K2WB16X 412ON3GMI1F9H6868EDU 4JGRS8LFTJA5B9JZZDCN BO2OKHSNRFX39C8FTUXI PVBNC7HS7UE4RA7I76GI 3GCOA1BH97LVAFCVZIBL 8L9FXBWCZXPS3I8ZJ8ZU NH4N19Y9IICLAGPZ7EG1 ...
8） default.rgw.users.swift
包含注册的子用户(用于swift)。
# rados -p default.rgw.users.swift ls
9) default.rgw.buckets.index
包含bucket信息，和default.rgw.data.root对应。
# rados -p default.rgw.buckets.index ls .dir.78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11
10) default.rgw.buckets.data
包含每个bucket目录下的object。
# rados -p default.rgw.buckets.data ls | grep "78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11"
78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11__multipart_f90bc5b01ee550a61ca3d7a6993e863c_1.2~gii8SrB-7mFepWvb_flR_vZ-rwcyL_n.3
78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11__multipart_931ed2b0edcea755675d67d1bf5edef1_19.2~3wDME9d_ntrl-l_MF5dpi70ycL-35lm.3
78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11__multipart_2e58afcfaee9fef3b2be9963e45c986a_1.2~pcoCTx8dG4JwRtxxYwh2e5Dgaqm9Jnq.1
78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11__multipart_ad5496efb007cd3726b331490987fd03_1.2~BvnuoIfhpzgskVzH7yNdGJKXbE89P5f.1
78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11__multipart_701d70d3033f0a885f4c0ba792bc4597_1.2~X-omYr0C4kGS6l5XqUn0VxNbUrjUzZG.4
78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11__multipart_701d70d3033f0a885f4c0ba792bc4597_1.2~X-omYr0C4kGS6l5XqUn0VxNbUrjUzZG.7
78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11__multipart_931ed2b0edcea755675d67d1bf5edef1_19.2~3wDME9d_ntrl-l_MF5dpi70ycL-35lm.19
78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11__multipart_80a61aa9359429c0c103a204ddcea5f2_1.2~MUAMe80jwm9K-kyYzXA6Arw5iVl2YXP.1
78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11_f90bc5b01ee550a61ca3d7a6993e863c_1
....
# rados -p default.rgw.buckets.index listomapkeys .dir.78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11
28fb479ea32e0037590e32ca48ff189d_1
2e58afcfaee9fef3b2be9963e45c986a_1
701d70d3033f0a885f4c0ba792bc4597_1
80a61aa9359429c0c103a204ddcea5f2_1
931ed2b0edcea755675d67d1bf5edef1_19
ad5496efb007cd3726b331490987fd03_1
b464a8dfbe27c555ea84843557f70926_1
d2a6727a280b020c7f7edc0182cd89b0_1
f90bc5b01ee550a61ca3d7a6993e863c_1
# radosgw-admin bucket list --bucket=app_wangpan_uat_liuzy28_bucket | grep -w name
"name": "28fb479ea32e0037590e32ca48ff189d_1",
"name": "2e58afcfaee9fef3b2be9963e45c986a_1",
"name": "701d70d3033f0a885f4c0ba792bc4597_1",
"name": "80a61aa9359429c0c103a204ddcea5f2_1",
"name": "931ed2b0edcea755675d67d1bf5edef1_19",
"name": "ad5496efb007cd3726b331490987fd03_1",
"name": "b464a8dfbe27c555ea84843557f70926_1",
"name": "d2a6727a280b020c7f7edc0182cd89b0_1",
"name": "f90bc5b01ee550a61ca3d7a6993e863c_1",
上面可以看到bucket下有9个文件。
# rados -p default.rgw.buckets.data listxattr \ 78b9bcbb-b328-4e4a-8417-4ed933be88bb.113396.11__multipart_f90bc5b01ee550a61ca3d7a6993e863c_1.2~gii8SrB-7mFepWvb_flR_vZ-rwcyL_n.3 user.rgw.acl user.rgw.content_type user.rgw.etag user.rgw.pg_ver user.rgw.source_zone user.rgw.x-amz-date user.rgw.x-amz-user-agent
对于每个object都包含相应的属性。
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