Hi,
since last week the scrubbing results in large omap warning.
After some digging I've got these results:
# searching for indexes with large omaps:
$ for i in `rados -p eu-central-1.rgw.buckets.index ls`; do
rados -p eu-central-1.rgw.buckets.index listomapkeys $i | wc -l | tr -d
'\n' >> omapkeys
echo " - ${i}" >> omapkeys
done
$ sort -n omapkeys | tail -n 15
212010 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2342226177.1.0
212460 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2342226177.1.3
212466 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2342226177.1.10
213165 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2342226177.1.4
354692 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.7
354760 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.5
354799 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.1
355040 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.10
355874 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.2
355930 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.3
356499 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.6
356583 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.8
356925 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.4
356935 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.9
358986 - .dir.ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1.0
So I have a bucket (ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1) with
11 shards where each shard got around 350k omapkeys.
When checking what bucket it is is get a total different number:
$ radosgw-admin bucket stats
--bucket-id=ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1
{
"bucket": "bucket",
"num_shards": 11,
"tenant": "",
"zonegroup": "da651dc1-2663-4e1b-af2e-ac4454f24c9d",
"placement_rule": "default-placement",
"explicit_placement": {
"data_pool": "",
"data_extra_pool": "",
"index_pool": ""
},
"id": "ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2421332952.1",
"marker": "ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2296333939.13",
"index_type": "Normal",
"owner": "user",
"ver":
"0#45265,1#44764,2#44631,3#44777,4#44859,5#44637,6#44814,7#44506,8#44853,9#44764,10#44813",
"master_ver": "0#0,1#0,2#0,3#0,4#0,5#0,6#0,7#0,8#0,9#0,10#0",
"mtime": "2022-11-16T08:34:17.298979Z",
"creation_time": "2021-11-16T09:13:34.480637Z",
"max_marker": "0#,1#,2#,3#,4#,5#,6#,7#,8#,9#,10#",
"usage": {
"rgw.main": {
"size": 66897607205,
"size_actual": 68261179392,
"size_utilized": 66897607205,
"size_kb": 65329695,
"size_kb_actual": 66661308,
"size_kb_utilized": 65329695,
"num_objects": 663369
},
"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
}
}
It got 11 shards, with a total of 663k files. radosgw-admin bucket limit
check gives 60k objects per shard.
After getting a list with all omapkeys (total of 3917043) I see that
entries look like this (only in less, not in cat) - the ^@ char:
$ grep -aF object1 2421332952.1_omapkeys
object1
object1^@v910^@i3nb5Cdp00wrt3Phhbn4MgwTcsM7sdwK
object1^@v913^@iPVPdb60UlfOu4Mwzr.oqojwWzRdgheZ
<80>1000_object1^@i3nb5Cdp00wrt3Phhbn4MgwTcsM7sdwK
<80>1000_object1^@iPVPdb60UlfOu4Mwzr.oqojwWzRdgheZ
<80>1001_object1
I also pulled the whole bucket index of said bucket via radosgw-admin bi
list --bucket bucket > bucket_index_list and searched via jq for the
object1:
$ jq '.[] | select(.entry.name == "object1")' bucket_index_list
{
"type": "plain",
"idx": "object1",
"entry": {
"name": "object1",
"instance": "",
"ver": {
"pool": -1,
"epoch": 0
},
"locator": "",
"exists": "false",
"meta": {
"category": 0,
"size": 0,
"mtime": "0.000000",
"etag": "",
"storage_class": "",
"owner": "",
"owner_display_name": "",
"content_type": "",
"accounted_size": 0,
"user_data": "",
"appendable": "false"
},
"tag": "",
"flags": 8,
"pending_map": [],
"versioned_epoch": 0
}
}
{
"type": "plain",
"idx": "object1\u0000v910\u0000i3nb5Cdp00wrt3Phhbn4MgwTcsM7sdwK",
"entry": {
"name": "object1",
"instance": "3nb5Cdp00wrt3Phhbn4MgwTcsM7sdwK",
"ver": {
"pool": -1,
"epoch": 0
},
"locator": "",
"exists": "false",
"meta": {
"category": 0,
"size": 0,
"mtime": "2022-12-16T00:00:28.651053Z",
"etag": "",
"storage_class": "",
"owner": "user",
"owner_display_name": "user",
"content_type": "",
"accounted_size": 0,
"user_data": "",
"appendable": "false"
},
"tag": "delete-marker",
"flags": 7,
"pending_map": [],
"versioned_epoch": 5
}
}
{
"type": "plain",
"idx": "object1\u0000v913\u0000iPVPdb60UlfOu4Mwzr.oqojwWzRdgheZ",
"entry": {
"name": "object1",
"instance": "PVPdb60UlfOu4Mwzr.oqojwWzRdgheZ",
"ver": {
"pool": 11,
"epoch": 2375707
},
"locator": "",
"exists": "true",
"meta": {
"category": 1,
"size": 10858,
"mtime": "2021-12-15T12:05:30.351753Z",
"etag": "8cc8ba9599322c17af56996bc0a85af0",
"storage_class": "",
"owner": "user",
"owner_display_name": "user",
"content_type": "image/jpeg",
"accounted_size": 10858,
"user_data": "",
"appendable": "false"
},
"tag": "ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2297644265.64076989",
"flags": 1,
"pending_map": [],
"versioned_epoch": 2
}
}
{
"type": "instance",
"idx": "�1000_object1\u0000i3nb5Cdp00wrt3Phhbn4MgwTcsM7sdwK",
"entry": {
"name": "object1",
"instance": "3nb5Cdp00wrt3Phhbn4MgwTcsM7sdwK",
"ver": {
"pool": -1,
"epoch": 0
},
"locator": "",
"exists": "false",
"meta": {
"category": 0,
"size": 0,
"mtime": "2022-12-16T00:00:28.651053Z",
"etag": "",
"storage_class": "",
"owner": "user",
"owner_display_name": "user",
"content_type": "",
"accounted_size": 0,
"user_data": "",
"appendable": "false"
},
"tag": "delete-marker",
"flags": 7,
"pending_map": [],
"versioned_epoch": 5
}
}
{
"type": "instance",
"idx": "�1000_object1\u0000iPVPdb60UlfOu4Mwzr.oqojwWzRdgheZ",
"entry": {
"name": "object1",
"instance": "PVPdb60UlfOu4Mwzr.oqojwWzRdgheZ",
"ver": {
"pool": 11,
"epoch": 2375707
},
"locator": "",
"exists": "true",
"meta": {
"category": 1,
"size": 10858,
"mtime": "2021-12-15T12:05:30.351753Z",
"etag": "8cc8ba9599322c17af56996bc0a85af0",
"storage_class": "",
"owner": "user",
"owner_display_name": "user",
"content_type": "image/jpeg",
"accounted_size": 10858,
"user_data": "",
"appendable": "false"
},
"tag": "ff7a8b0c-07e6-463a-861b-78f0adeba8ad.2297644265.64076989",
"flags": 1,
"pending_map": [],
"versioned_epoch": 2
}
}
Does anyone know what is happening here? And what should I do about the
large omap objects? Reshard again?
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