compression功能测试方法是什么

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compression功能测试

1.启动compression

功能描述:
1.目前从k版本开始支持compression，目前支持zlib、snappy、zstd，注意从ceph version 12.0.0开始才加入了zstd插件。
2.注意配置的时候如果设置的插件不存在或者名称错误，则不启用压缩特性。
3.目前压缩特性只对data_pool这个pool的数据有效。
4. 可以实时变更插件类型而不影响之前写入的数据访问。（写入object的时候每个object都有一个内置变量标记当前object使用的压缩插件类型。）
5.compression特性对用户透明，用户是无法感知压缩功能是否存在的。

root@demo:/home/user# radosgw-admin zone placement modify --rgw-zone=default --placement-id=default-placement --compression=zstd{    "id": "eab5746a-26fa-42b4-a5f3-5d887ba846f9",    "name": "default",    "domain_root": "default.rgw.data.root",    "control_pool": "default.rgw.control",    "gc_pool": "default.rgw.gc",    "lc_pool": "default.rgw.lc",    "log_pool": "default.rgw.log",    "intent_log_pool": "default.rgw.intent-log",    "usage_log_pool": "default.rgw.usage",    "user_keys_pool": "default.rgw.users.keys",    "user_email_pool": "default.rgw.users.email",    "user_swift_pool": "default.rgw.users.swift",    "user_uid_pool": "default.rgw.users.uid",    "system_key": {        "access_key": "",        "secret_key": ""    },    "placement_pools": [        {            "key": "default-placement",            "val": {                "index_pool": "default.rgw.buckets.index",                "data_pool": "default.rgw.buckets.data",                "data_extra_pool": "default.rgw.buckets.non-ec",                "index_type": 0,                "compression": "zstd" #插件类型            }        },        {            "key": "new",            "val": {                "index_pool": "new.buckets.index",                "data_pool": "new.buckets.data",                "data_extra_pool": "new.buckets.extra",                "index_type": 0,                "compression": "zlib" #插件类型            }        }    ],    "metadata_heap": "",    "tier_config": [],    "realm_id": ""}

2.查看compression配置

root@demo:/home/user# radosgw-admin zone placement list --rgw-zone=default[    {        "key": "default-placement",        "val": {            "index_pool": "default.rgw.buckets.index",            "data_pool": "default.rgw.buckets.data",            "data_extra_pool": "default.rgw.buckets.non-ec",            "index_type": 0,            "compression": "zstd" #插件类型        }    },    {        "key": "new",        "val": {            "index_pool": "new.buckets.index",            "data_pool": "new.buckets.data",            "data_extra_pool": "new.buckets.extra",            "index_type": 0,            "compression": "zlib" #插件类型        }    }]

3.压缩效果对比

测试使用一个iso镜像文件，对比压缩前后的体检差异

root@demo:/home/user# radosgw-admin bucket stats --bucket=snappy-test{    "bucket": "snappy-test",    "pool": "default.rgw.buckets.data",    "index_pool": "default.rgw.buckets.index",    "id": "0fef9464-bfe0-428b-86b5-b8d51876ff81.4274.1",    "marker": "0fef9464-bfe0-428b-86b5-b8d51876ff81.4274.1",    "owner": "u-gfn2636",    "ver": "0#41",    "master_ver": "0#0",    "mtime": "2017-03-21 09:44:13.698936",    "max_marker": "0#",    "usage": {        "rgw.main": {            "size": 258998272,            "size_actual": 248091783 ，#实际文件大小            "size_utilized": 248091783, #压缩后的大小            "size_kb": 252928,            "size_kb_actual": 252928,            "size_kb_utilized": 242278,            "num_objects": 1        },        "rgw.multimeta": {            "size": 0,            "size_actual": 0,            "size_utilized": 0,            "size_kb": 0,            "size_kb_actual": 0,            "size_kb_utilized": 0,            "num_objects": 0        }    },    "bucket_quota": {        "enabled": false,        "check_on_raw": false,        "max_size": -1,        "max_size_kb": 0,        "max_objects": -1    }}

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