Casey,
Thanks very much for the reply!
We definitely have lots of errors on sync-disabled buckets and the
workaround for that is obvious (most of them are empty anyway).
Our second form of error is stale buckets. We had dynamic resharding
enabled but have now disabled it (having discovered it was on by
default, and not supported in multisite).
We removed several hundred stale buckets via 'radosgw-admin sharding
stale-instances rm', but they are still giving us sync errors.
I have found that these buckets do have entries in 'radosgw-admin
datalog list', and my guess is this could be fixed by doing a
'radosgw-admin datalog trim' for each entry on the master zone.
Does that sound right? :-)
Thanks again for the detailed explanation,
Trey Palmer
On Tue, Mar 5, 2019 at 5:55 PM Casey Bodley <cbod...@redhat.com
<mailto:cbod...@redhat.com>> wrote:
Hi Christian,
I think you've correctly intuited that the issues are related to
the use
of 'bucket sync disable'. There was a bug fix for that feature in
http://tracker.ceph.com/issues/26895, and I recently found that a
block
of code was missing from its luminous backport. That missing code is
what handled those "ERROR: init sync on <bucket instance> failed,
retcode=-2" errors.
I included a fix for that in a later backport
(https://github.com/ceph/ceph/pull/26549), which I'm still working to
get through qa. I'm afraid I can't really recommend a workaround
for the
issue in the meantime.
Looking forward though, we do plan to support something like s3's
cross
region replication so you can enable replication on a specific bucket
without having to enable it globally.
Casey
On 3/5/19 2:32 PM, Christian Rice wrote:
>
> Much appreciated. We’ll continue to poke around and certainly will
> disable the dynamic resharding.
>
> We started with 12.2.8 in production. We definitely did not
have it
> enabled in ceph.conf
>
> *From: *Matthew H <matthew.he...@hotmail.com
<mailto:matthew.he...@hotmail.com>>
> *Date: *Tuesday, March 5, 2019 at 11:22 AM
> *To: *Christian Rice <cr...@pandora.com
<mailto:cr...@pandora.com>>, ceph-users
> <ceph-users@lists.ceph.com <mailto:ceph-users@lists.ceph.com>>
> *Cc: *Trey Palmer <nerdmagic...@gmail.com
<mailto:nerdmagic...@gmail.com>>
> *Subject: *Re: radosgw sync falling behind regularly
>
> Hi Christian,
>
> To be on the safe side and future proof yourself will want to go
ahead
> and set the following in your ceph.conf file, and then issue a
restart
> to your RGW instances.
>
> rgw_dynamic_resharding = false
>
> There are a number of issues with dynamic resharding, multisite rgw
> problems being just one of them. However I thought it was disabled
> automatically when multisite rgw is used (but I will have to double
> check the code on that). What version of Ceph did you initially
> install the cluster with? Prior to v12.2.2 this feature was
enabled by
> default for all rgw use cases.
>
> Thanks,
>
>
------------------------------------------------------------------------
>
> *From:*Christian Rice <cr...@pandora.com <mailto:cr...@pandora.com>>
> *Sent:* Tuesday, March 5, 2019 2:07 PM
> *To:* Matthew H; ceph-users
> *Subject:* Re: radosgw sync falling behind regularly
>
> Matthew, first of all, let me say we very much appreciate your help!
>
> So I don’t think we turned dynamic resharding on, nor did we
manually
> reshard buckets. Seems like it defaults to on for luminous but the
> mimic docs say it’s not supported in multisite. So do we need to
> disable it manually via tell and ceph.conf?
>
> Also, after running the command you suggested, all the stale
instances
> are gone…these from my examples were in output:
>
> "bucket_instance":
>
"sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18467.303",
>
> "bucket_instance":
>
"sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299",
>
> "bucket_instance":
>
"sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.301",
>
> Though we still get lots of log messages like so in rgw:
>
> 2019-03-05 11:01:09.526120 7f64120ae700 0 ERROR: failed to get
bucket
> instance info for
>
.bucket.meta.sysad_task:sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299
>
> 2019-03-05 11:01:09.528664 7f63e5016700 1 civetweb:
0x55976f1c2000:
> 172.17.136.17 - - [05/Mar/2019:10:54:06 -0800] "GET
>
/admin/metadata/bucket.instance/sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299?key=sysad_task%2Fsysad-task%3A1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299&rgwx-zonegroup=de6af748-1a2f-44a1-9d44-30799cf1313e
> HTTP/1.1" 404 0 - -
>
> 2019-03-05 11:01:09.529648 7f64130b0700 0 meta sync: ERROR: can't
> remove key:
>
bucket.instance:sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299
> ret=-2
>
> 2019-03-05 11:01:09.530324 7f64138b1700 0 ERROR: failed to get
bucket
> instance info for
>
.bucket.meta.sysad_task:sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299
>
> 2019-03-05 11:01:09.530345 7f6405094700 0 data sync: ERROR:
failed to
> retrieve bucket info for
>
bucket=sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299
>
> 2019-03-05 11:01:09.531774 7f6405094700 0 data sync: WARNING:
> skipping data log entry for missing bucket
> sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299
>
> 2019-03-05 11:01:09.571680 7f6405094700 0 data sync: ERROR:
init sync
> on
>
sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.302
> failed, retcode=-2
>
> 2019-03-05 11:01:09.573179 7f6405094700 0 data sync: WARNING:
> skipping data log entry for missing bucket
> sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.302
>
> 2019-03-05 11:01:13.504308 7f63f903e700 1 civetweb:
0x55976f0f2000:
> 10.105.18.20 - - [05/Mar/2019:11:00:57 -0800] "GET
>
/admin/metadata/bucket.instance/sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299?key=sysad_task%2Fsysad-task%3A1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299&rgwx-zonegroup=de6af748-1a2f-44a1-9d44-30799cf1313e
> HTTP/1.1" 404 0 - -
>
> *From: *Matthew H <matthew.he...@hotmail.com
<mailto:matthew.he...@hotmail.com>>
> *Date: *Tuesday, March 5, 2019 at 10:03 AM
> *To: *Christian Rice <cr...@pandora.com
<mailto:cr...@pandora.com>>, ceph-users
> <ceph-users@lists.ceph.com <mailto:ceph-users@lists.ceph.com>>
> *Subject: *Re: radosgw sync falling behind regularly
>
> Hi Christian,
>
> You have stale bucket instances that need to be clean up, which is
> what 'radosgw-admin reshard stale-instances list' is showing
you. Have
> you or were you manually resharding your buckets? The errors you
are
> seeing in the logs are related to these stale instances being kept
> around.
>
> In v12.2.11 this command along with 'radosgw-admin reshard
> stale-instance rm' was introduced [1].
>
> Hopefully this helps.
>
> [1]
>
> https://ceph.com/releases/v12-2-11-luminous-released/
>
<https://urldefense.proofpoint.com/v2/url?u=https-3A__ceph.com_releases_v12-2D2-2D11-2Dluminous-2Dreleased_&d=DwMF-g&c=gFTBenQ7Vj71sUi1A4CkFnmPzqwDo07QsHw-JRepxyw&r=NE1NbWtVhgG-K7YvLdoLZigfFx8zGPwOGk6HWpYK04I&m=vdtYIn6lEKaWD9wW297aHjQLpmQdHZrOVpOhmCBqkqo&s=nGCpS4p5jnaSpPUFlziSi3Y3pFijhVDy6e3867jA9BE&e=>
>
> /"There have been fixes to RGW dynamic and manual resharding,
which no
> longer
> leaves behind stale bucket instances to be removed manually. For
> finding and
> cleaning up older instances from a reshard a radosgw-admin
command reshard
> stale-instances list and reshard stale-instances rm should do the
> necessary
> cleanup."/
>
>
------------------------------------------------------------------------
>
> *From:*Christian Rice <cr...@pandora.com <mailto:cr...@pandora.com>>
> *Sent:* Tuesday, March 5, 2019 11:34 AM
> *To:* Matthew H; ceph-users
> *Subject:* Re: radosgw sync falling behind regularly
>
> The output of “radosgw-admin reshard stale-instances list” shows
242
> entries, which might embed too much proprietary info for me to
list,
> but here’s a tiny sample:
>
>
"sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18467.303",
>
>
"sysad_task/sysad_task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18467.281",
>
>
"sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299",
>
>
"sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.301",
>
> Some of appear repeatedly in the radosgw error logs like so:
>
> 2019-03-05 08:13:08.929206 7f6405094700 0 data sync: ERROR:
init sync
> on
>
sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.302
> failed, retcode=-2
>
> 2019-03-05 08:13:08.930581 7f6405094700 0 data sync: WARNING:
> skipping data log entry for missing bucket
> sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.302
>
> 2019-03-05 08:13:08.972053 7f6405094700 0 data sync: ERROR:
init sync
> on
>
sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299
> failed, retcode=-2
>
> 2019-03-05 08:13:08.973442 7f6405094700 0 data sync: WARNING:
> skipping data log entry for missing bucket
> sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299
>
> 2019-03-05 08:13:19.528295 7f6406897700 0 data sync: ERROR:
init sync
> on
>
sysad_task/sysad-task:1e27bf9c-3a2f-4845-85b6-33a24bbe1c04.18330.299
> failed, retcode=-2
>
> Notably, “Sync is disabled for bucket sysad-task.” We use “bucket
> sync disable” A LOT. It’s the only way we’ve been able to use
> multisite and a single namespace and not replicate things that are
> unneeded to every zone. Perhaps there’s a bug in the
implementation
> that’s tripping us up now, with the new sync multisite sync code
from
> 12.2.9 onward?
>
> What might we do with stale bucket instances, then?
>
> Of note, our master zone endpoint, which was timing out health
checks
> most of the day after the upgrade (was running but overworked by
> cluster confusion, so we couldn’t create new buckets or do user
ops),
> has returned to availability late last night. There’s a lot of
data
> to look at, but in my estimation, due to lack of user complaints
(or
> their unawareness of specific issues), it seems the zones are
> nominally available, even with all the errors and warnings being
> logged. We’ve tested simple zone replication by creating a few
files
> in one zone and seeing them show up elsewhere…
>
> here’s “period get” output:
>
> sv5-ceph-rgw1
>
> {
>
> "id": "3d0d40ef-90de-40ea-8c44-caa20ea8dc53",
>
> "epoch": 16,
>
> "predecessor_uuid": "926c74c7-c1a7-46b1-9f25-eb5c392a7fbb",
>
> "sync_status": [],
>
> "period_map": {
>
> "id": "3d0d40ef-90de-40ea-8c44-caa20ea8dc53",
>
> "zonegroups": [
>
> {
>
> "id": "de6af748-1a2f-44a1-9d44-30799cf1313e",
>
> "name": "us",
>
> "api_name": "us",
>
> "is_master": "true",
>
> "endpoints": [
>
> "http://sv5-ceph-rgw1.savagebeast.com:8080";
>
> ],
>
> "hostnames": [],
>
> "hostnames_s3website": [],
>
> "master_zone": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "zones": [
>
> {
>
> "id": "107d29a0-b732-4bf1-a26e-1f64f820e839",
>
> "name": "dc11-prod",
>
> "endpoints": [
>
> "http://dc11-ceph-rgw1:8080";
>
> ],
>
> "log_meta": "false",
>
> "log_data": "true",
>
> "bucket_index_max_shards": 0,
>
> "read_only": "false",
>
> "tier_type": "",
>
> "sync_from_all": "true",
>
> "sync_from": []
>
> },
>
> {
>
> "id": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "name": "sv5-corp",
>
> "endpoints": [
>
> "http://sv5-ceph-rgw1.savagebeast.com:8080";
>
> ],
>
> "log_meta": "false",
>
> "log_data": "true",
>
> "bucket_index_max_shards": 0,
>
> "read_only": "false",
>
> "tier_type": "",
>
> "sync_from_all": "true",
>
> "sync_from": []
>
> },
>
> {
>
> "id": "331d3f1e-1b72-4c56-bb5a-d1d0fcf6d0b8",
>
> "name": "sv3-prod",
>
> "endpoints": [
>
> "http://sv3-ceph-rgw1:8080";
>
> ],
>
> "log_meta": "false",
>
> "log_data": "true",
>
> "bucket_index_max_shards": 0,
>
> "read_only": "false",
>
> "tier_type": "",
>
> "sync_from_all": "true",
>
> "sync_from": []
>
> }
>
> ],
>
> "placement_targets": [
>
> {
>
> "name": "default-placement",
>
> "tags": []
>
> }
>
> ],
>
> "default_placement": "default-placement",
>
> "realm_id": "b3e2afe7-2254-494a-9a34-ce50358779fd"
>
> }
>
> ],
>
> "short_zone_ids": [
>
> {
>
> "key": "107d29a0-b732-4bf1-a26e-1f64f820e839",
>
> "val": 1720993486
>
> },
>
> {
>
> "key": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "val": 2301637458
>
> },
>
> {
>
> "key": "331d3f1e-1b72-4c56-bb5a-d1d0fcf6d0b8",
>
> "val": 1449486239
>
> }
>
> ]
>
> },
>
> "master_zonegroup": "de6af748-1a2f-44a1-9d44-30799cf1313e",
>
> "master_zone": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "period_config": {
>
> "bucket_quota": {
>
> "enabled": false,
>
> "check_on_raw": false,
>
> "max_size": -1,
>
> "max_size_kb": 0,
>
> "max_objects": -1
>
> },
>
> "user_quota": {
>
> "enabled": false,
>
> "check_on_raw": false,
>
> "max_size": -1,
>
> "max_size_kb": 0,
>
> "max_objects": -1
>
> }
>
> },
>
> "realm_id": "b3e2afe7-2254-494a-9a34-ce50358779fd",
>
> "realm_name": "savagebucket",
>
> "realm_epoch": 2
>
> }
>
> sv3-ceph-rgw1
>
> {
>
> "id": "3d0d40ef-90de-40ea-8c44-caa20ea8dc53",
>
> "epoch": 16,
>
> "predecessor_uuid": "926c74c7-c1a7-46b1-9f25-eb5c392a7fbb",
>
> "sync_status": [],
>
> "period_map": {
>
> "id": "3d0d40ef-90de-40ea-8c44-caa20ea8dc53",
>
> "zonegroups": [
>
> {
>
> "id": "de6af748-1a2f-44a1-9d44-30799cf1313e",
>
> "name": "us",
>
> "api_name": "us",
>
> "is_master": "true",
>
> "endpoints": [
>
> "http://sv5-ceph-rgw1.savagebeast.com:8080";
>
> ],
>
> "hostnames": [],
>
> "hostnames_s3website": [],
>
> "master_zone": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "zones": [
>
> {
>
> "id": "107d29a0-b732-4bf1-a26e-1f64f820e839",
>
> "name": "dc11-prod",
>
> "endpoints": [
>
> "http://dc11-ceph-rgw1:8080";
>
> ],
>
> "log_meta": "false",
>
> "log_data": "true",
>
> "bucket_index_max_shards": 0,
>
> "read_only": "false",
>
> "tier_type": "",
>
> "sync_from_all": "true",
>
> "sync_from": []
>
> },
>
> {
>
> "id": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "name": "sv5-corp",
>
> "endpoints": [
>
> "http://sv5-ceph-rgw1.savagebeast.com:8080";
>
> ],
>
> "log_meta": "false",
>
> "log_data": "true",
>
> "bucket_index_max_shards": 0,
>
> "read_only": "false",
>
> "tier_type": "",
>
> "sync_from_all": "true",
>
> "sync_from": []
>
> },
>
> {
>
> "id": "331d3f1e-1b72-4c56-bb5a-d1d0fcf6d0b8",
>
> "name": "sv3-prod",
>
> "endpoints": [
>
> "http://sv3-ceph-rgw1:8080";
>
> ],
>
> "log_meta": "false",
>
> "log_data": "true",
>
> "bucket_index_max_shards": 0,
>
> "read_only": "false",
>
> "tier_type": "",
>
> "sync_from_all": "true",
>
> "sync_from": []
>
> }
>
> ],
>
> "placement_targets": [
>
> {
>
> "name": "default-placement",
>
> "tags": []
>
> }
>
> ],
>
> "default_placement": "default-placement",
>
> "realm_id": "b3e2afe7-2254-494a-9a34-ce50358779fd"
>
> }
>
> ],
>
> "short_zone_ids": [
>
> {
>
> "key": "107d29a0-b732-4bf1-a26e-1f64f820e839",
>
> "val": 1720993486
>
> },
>
> {
>
> "key": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "val": 2301637458
>
> },
>
> {
>
> "key": "331d3f1e-1b72-4c56-bb5a-d1d0fcf6d0b8",
>
> "val": 1449486239
>
> }
>
> ]
>
> },
>
> "master_zonegroup": "de6af748-1a2f-44a1-9d44-30799cf1313e",
>
> "master_zone": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "period_config": {
>
> "bucket_quota": {
>
> "enabled": false,
>
> "check_on_raw": false,
>
> "max_size": -1,
>
> "max_size_kb": 0,
>
> "max_objects": -1
>
> },
>
> "user_quota": {
>
> "enabled": false,
>
> "check_on_raw": false,
>
> "max_size": -1,
>
> "max_size_kb": 0,
>
> "max_objects": -1
>
> }
>
> },
>
> "realm_id": "b3e2afe7-2254-494a-9a34-ce50358779fd",
>
> "realm_name": "savagebucket",
>
> "realm_epoch": 2
>
> }
>
> dc11-ceph-rgw1
>
> {
>
> "id": "3d0d40ef-90de-40ea-8c44-caa20ea8dc53",
>
> "epoch": 16,
>
> "predecessor_uuid": "926c74c7-c1a7-46b1-9f25-eb5c392a7fbb",
>
> "sync_status": [],
>
> "period_map": {
>
> "id": "3d0d40ef-90de-40ea-8c44-caa20ea8dc53",
>
> "zonegroups": [
>
> {
>
> "id": "de6af748-1a2f-44a1-9d44-30799cf1313e",
>
> "name": "us",
>
> "api_name": "us",
>
> "is_master": "true",
>
> "endpoints": [
>
> "http://sv5-ceph-rgw1.savagebeast.com:8080";
>
> ],
>
> "hostnames": [],
>
> "hostnames_s3website": [],
>
> "master_zone": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "zones": [
>
> {
>
> "id": "107d29a0-b732-4bf1-a26e-1f64f820e839",
>
> "name": "dc11-prod",
>
> "endpoints": [
>
> "http://dc11-ceph-rgw1:8080";
>
> ],
>
> "log_meta": "false",
>
> "log_data": "true",
>
> "bucket_index_max_shards": 0,
>
> "read_only": "false",
>
> "tier_type": "",
>
> "sync_from_all": "true",
>
> "sync_from": []
>
> },
>
> {
>
> "id": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "name": "sv5-corp",
>
> "endpoints": [
>
> "http://sv5-ceph-rgw1.savagebeast.com:8080";
>
> ],
>
> "log_meta": "false",
>
> "log_data": "true",
>
> "bucket_index_max_shards": 0,
>
> "read_only": "false",
>
> "tier_type": "",
>
> "sync_from_all": "true",
>
> "sync_from": []
>
> },
>
> {
>
> "id": "331d3f1e-1b72-4c56-bb5a-d1d0fcf6d0b8",
>
> "name": "sv3-prod",
>
> "endpoints": [
>
> "http://sv3-ceph-rgw1:8080";
>
> ],
>
> "log_meta": "false",
>
> "log_data": "true",
>
> "bucket_index_max_shards": 0,
>
> "read_only": "false",
>
> "tier_type": "",
>
> "sync_from_all": "true",
>
> "sync_from": []
>
> }
>
> ],
>
> "placement_targets": [
>
> {
>
> "name": "default-placement",
>
> "tags": []
>
> }
>
> ],
>
> "default_placement": "default-placement",
>
> "realm_id": "b3e2afe7-2254-494a-9a34-ce50358779fd"
>
> }
>
> ],
>
> "short_zone_ids": [
>
> {
>
> "key": "107d29a0-b732-4bf1-a26e-1f64f820e839",
>
> "val": 1720993486
>
> },
>
> {
>
> "key": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "val": 2301637458
>
> },
>
> {
>
> "key": "331d3f1e-1b72-4c56-bb5a-d1d0fcf6d0b8",
>
> "val": 1449486239
>
> }
>
> ]
>
> },
>
> "master_zonegroup": "de6af748-1a2f-44a1-9d44-30799cf1313e",
>
> "master_zone": "1e27bf9c-3a2f-4845-85b6-33a24bbe1c04",
>
> "period_config": {
>
> "bucket_quota": {
>
> "enabled": false,
>
> "check_on_raw": false,
>
> "max_size": -1,
>
> "max_size_kb": 0,
>
> "max_objects": -1
>
> },
>
> "user_quota": {
>
> "enabled": false,
>
> "check_on_raw": false,
>
> "max_size": -1,
>
> "max_size_kb": 0,
>
> "max_objects": -1
>
> }
>
> },
>
> "realm_id": "b3e2afe7-2254-494a-9a34-ce50358779fd",
>
> "realm_name": "savagebucket",
>
> "realm_epoch": 2
>
> }
>
> *From: *Matthew H <matthew.he...@hotmail.com
<mailto:matthew.he...@hotmail.com>>
> *Date: *Tuesday, March 5, 2019 at 4:31 AM
> *To: *Christian Rice <cr...@pandora.com
<mailto:cr...@pandora.com>>, ceph-users
> <ceph-users@lists.ceph.com <mailto:ceph-users@lists.ceph.com>>
> *Subject: *Re: radosgw sync falling behind regularly
>
> Hi Christian,
>
> You haven't resharded any of your buckets have you? You can run
the
> command below in v12.2.11 to list stale bucket instances.
>
> radosgw-admin reshard stale-instances list
>
> Can you also send the output from the following command on each rgw?
>
> radosgw-admin period get
>
>
> _______________________________________________
> ceph-users mailing list
> ceph-users@lists.ceph.com <mailto:ceph-users@lists.ceph.com>
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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