FW: Regarding Ceph Debug Logs

FW: Regarding Ceph Debug Logs

[Roshni Chatterjee]

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Hi All,

I am new to ceph and I am trying to debug a few scenarios . I have 2 queries as listed below  -
1.Regarding enabling debug logs for ceph
2.Regarding internal processes of ceph

QUERY 1
I have enabled the logs by setting the log level in ceph conf file attached above -

But none of this is generating information that could be used in debugging .
Also ,
The following CLI generates log as attached in cli_log attachment -
What are the following codes in the log like -
7f12a474c700 , 7f12895af700

QUERY 2

While running Ceph on LTTng , I came across multiple processes spawned like tp_osd_tp ,tp_osd_recov, tp_osd_disk, osd_op ,tp_osd_cmd.
Why are these processes being spawned so many times and what is the function if each ?
If someone can share any document/link to understand the ceph internals processes/functions/working would be highly appreciated.

Regards,
Roshni

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[-- Attachment #2: ceph_config.txt --]
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[global]
fsid = ebc528fa-61f5-44be-b3df-5af92fce9379
mon_initial_members = ceph-admin
mon_host = 10.0.4.118
auth_cluster_required = cephx
auth_service_required = cephx
auth_client_required = cephx
osd pool default size = 1  # Write an object n times.
osd pool default min size = 1 # Allow writing n copy in a degraded state.
osd pool default pg num = 128
osd pool default pgp num = 128
debug ms = 1/5
debug tp log = 1/20
osd_tracing = true
osd_objectstore_tracing = true
rados_tracing = true
rbd_tracing = true

[mon]
        debug mon = 20
        debug paxos = 1/5
        debug auth = 2

[osd]
        debug osd = 1/5
        debug filestore = 1/5
        debug journal = 1
        debug monc = 5/20

[mds]
        debug mds = 1
        debug mds balancer = 1
        debug mds log = 1
        debug mds migrator = 1

log to syslog = true
err to syslog = true

[-- Attachment #3: cli_log.txt --]
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root@ceph-admin:/home/cephuser/cluster# rbd --pool mypool snap create --snap mysnap_myimage18 myimage
2017-07-13 17:20:41.107210 7f12a4759100  1 -- :/0 messenger.start
2017-07-13 17:20:41.108308 7f12a4759100  1 -- :/782351370 --> 10.0.4.118:6789/0 -- auth(proto 0 30 bytes epoch 0) v1 -- ?+0 0x557b971d75a0 con 0x557b971d7020
2017-07-13 17:20:41.111972 7f12a474c700  1 -- 10.0.4.118:0/782351370 learned my addr 10.0.4.118:0/782351370
2017-07-13 17:20:41.112625 7f12895af700  1 -- 10.0.4.118:0/782351370 <== mon.0 10.0.4.118:6789/0 1 ==== mon_map magic: 0 v1 ==== 200+0+0 (2014826046 0 0) 0x7f1274000bc0 con 0x557b971d7020

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