##1.引言 本文说明了如何查看每个BUCKET对应的索引信息，以及所在的OSD位置，为以后运维做参考。
##2.实验过程
###2.1 罗列出当前系统下所有的bucket信息
# radosgw-admin bucket list
[
"small_rd_test_bucket",
"mynewtest",
"mytest-2",
"xuwenping-bucket-zj-4",
"big_rd_test_bucket",
"mytest",
"my-scs-test",
"write_test_bucket",
]
上述命令展示了当前Ceph 对象存储系统中涉及到的所有的BUCKET。
###2.2 查看具体某个BUCKET属性
# radosgw-admin bucket stats --bucket=my-scs-test
{
"bucket": "my-scs-test",
"pool": ".rgw.buckets.zj-1",
"index_pool": ".rgw.buckets.index",
"id": "default.784974.1",
"marker": "default.784974.1",
"owner": "zj-user-1",
"ver": "0#1901",
"master_ver": "0#0",
"mtime": "2016-01-07 00:00:23.000000",
"max_marker": "0#",
"usage": {
"rgw.main": {
"size_kb": 1048870,
"size_kb_actual": 1048908,
"num_objects": 17
}
},
"bucket_quota": {
"enabled": false,
"max_size_kb": -1,
"max_objects": -1
}
}
该命令展示了BUCKET的名称，所在的data pool, index pool. BUCKET ID.
2.3 检查对应BUCKET在index中是否存在
# rados -p .rgw.buckets.index ls - | grep "default.784974.1"
.dir.default.784974.1
注：此处需要在BUCKET ID前面加上.dir. 才是它在INDEX POOL中的索引
###2.4 查看对应INDEX中记录的key
# rados -p .rgw.buckets.index listomapkeys .dir.default.784974.1
/home/.TempWrite.py.swp
/home/1024
/home/TempWrite.py
/home/crossdomain.xml
/home/download_url.txt
/home/region.conf.json
/home/region.conf.json.bk
/home/result
/home/s3Test.cpp
/home/s3testInMemory
/home/struct_def.h
/home/user.md.json
/home/user1.md.json
/home/user2.md.json
/home/user3.md.json
/home/user4.md.json
/home/zone.conf.json
统计文件数量
rados -p .rgw.buckets.index listomapkeys .dir.default.104766.19 | wc -l
988847
###2.5 查看对应索引信息存放的物理位置
# ceph osd map .rgw.buckets.index .dir.default.104766.19
osdmap e34039 pool '.rgw.buckets.index' (23) object '.dir.default.104766.19' -> pg 23.e3579e34 (23.34) -> up ([3,16,34], p3) acting ([3,16,34], p3)
通过命令可以看到，BUCKET my-scs-test 的index信息落在OSD 3,16,34上面，其中3为主osd.
##参考： 所有实验过程参考该文章而写