Hi Robert
usable bytes so before replication. The size of the actual original objects you write.
Cheers
JC
> On 15 Oct 2015, at 16:33, Robert LeBlanc <robert@xxxxxxxxxxxxx> wrote:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> One more question. Is max_{bytes,objects} before or after replication factor?
> - ----------------
> Robert LeBlanc
> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1
>
>
> On Thu, Oct 15, 2015 at 4:42 PM, LOPEZ Jean-Charles wrote:
>> Hi Robert,
>>
>> yes they do.
>>
>> Pools don’t have a size when you create them hence the couple value/ratio that is to be defined for cache tiering mechanism. Pool only have a number of PGs assigned. So setting the max values and the ratios for dirty and full must be set explicitly to match your configuration.
>>
>> Note that you can at the same time define max_bytes and max_objects. The first of the 2 values that breaches using your ratio settings will trigger eviction and/or flushing. The ratios you choose apply to both values.
>>
>> Cheers
>> JC
>>
>>> On 15 Oct 2015, at 15:02, Robert LeBlanc wrote:
>>>
>>> -----BEGIN PGP SIGNED MESSAGE-----
>>> Hash: SHA256
>>>
>>> hmmm...
>>>
>>> http://docs.ceph.com/docs/master/rados/operations/cache-tiering/#relative-sizing
>>>
>>> makes it sound like it should be based on the size of the pool and
>>> that you don't have to set anything like max bytes/objects. Can you
>>> confirm that cache_target_{dirty,dirty_high,full}_ratio works as a
>>> ratio of target_max_bytes set?
>>> - ----------------
>>> Robert LeBlanc
>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1
>>>
>>>
>>> On Thu, Oct 15, 2015 at 3:32 PM, Nick Fisk wrote:
>>>>
>>>>
>>>>
>>>>
>>>>> -----Original Message-----
>>>>> From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of
>>>>> Robert LeBlanc
>>>>> Sent: 15 October 2015 22:06
>>>>> To: ceph-users@xxxxxxxxxxxxxx
>>>>> Subject: Cache Tiering Question
>>>>>
>>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>>> Hash: SHA256
>>>>>
>>>>> ceph df (ceph version 0.94.3-252-g629b631
>>>>> (629b631488f044150422371ac77dfc005f3de1bc)) is showing some odd
>>>>> results:
>>>>>
>>>>> root@nodez:~# ceph df
>>>>> GLOBAL:
>>>>> SIZE AVAIL RAW USED %RAW USED
>>>>> 24518G 21670G 1602G 6.53
>>>>> POOLS:
>>>>> NAME ID USED %USED MAX AVAIL OBJECTS
>>>>> rbd 0 2723G 11.11 6380G 1115793
>>>>> ssd-pool 2 0 0 732G 1
>>>>>
>>>>> The rbd pool is showing 11.11% used, but if you calculate the numbers
>>>> there
>>>>> it is 2723/6380=42.68%.
>>>>
>>>> I have a feeling that the percentage is based on the amount used of the
>>>> total cluster size. Ie 2723/24518
>>>>
>>>>>
>>>>> Will this cause problems with the relative cache tier settings? Do I need
>>>> to set
>>>>> the percentage based on what Ceph is reporting here?
>>>>
>>>> The flushing/eviction thresholds are based on the target_max_bytes number
>>>> that you set, they have nothing to do with the underlying pool size. It's up
>>>> to you to come up with a sane number for this variable.
>>>>
>>>>>
>>>>> Thanks,
>>>>> - ----------------
>>>>> Robert LeBlanc
>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 -----
>>>>> BEGIN PGP SIGNATURE-----
>>>>> Version: Mailvelope v1.2.0
>>>>> Comment: https://www.mailvelope.com
>>>>>
>>>>> wsFcBAEBCAAQBQJWIBVGCRDmVDuy+mK58QAAXEYQAKm5IBGn81Hlb9az4
>>>>> 52x
>>>>> hSH6onk7mJE7L2s5FnoJv2sNW4azhDEVKGQBE9vvhIVBhhtKtnqdzu3ytk6E
>>>>> EUFuPBzUWLJyG3wQtp3QC0PdYzlGkS7bowdpZqk9PdaYZYgEdqG/cLEl/eAx
>>>>> LGIUXmr6vIuNhnntGIIYeUAiWXA7b5qzOKbef6OlOp7Mz6Euel9S8ycZlSAR
>>>>> eBQ5hdLSFoFai5ldyV+/hmqLnujOfanRFC8pIYr41aKe7wBOPOargLGQdka3
>>>>> jswmcf+0hV7QqZSOjJijDYvOgRuHBFK6cdyP9SRKxWxG7uH+yDOvya0TqOob
>>>>> 1yDomYC1zD2uzG9+L5Iv6at8fuBF5xFKPqax9N4WQj3Oj9fBwioQVBocNxHc
>>>>> MIlQnvnLeq6OLtdfPoPignTAHIH2RrvAmdwYkSCuopjUSTkmBsyBLIiiz/KI
>>>>> P4mSXAxZb0UF4pbCDgdYG6qUEywR/enGsT1lnmNLx4vY8W/yz9xQ3o3JnIpD
>>>>> pWyo9zJ8Ugnwvihbo7xKe+EZOeJL0YF4BiyAprH5pKFdQcAWcV98zWHnLBxd
>>>>> EFHyN9fHsVdw0UsxIUBZFfM1u4S7fchgVeFfiTSdGqd/dWHQCHKJPNBSJnae
>>>>> aPKTyvg77N6zTn04VGspfenR+svGbkAtUfO2HJ1Kkd4/wZ9GIzsS1ovPZFsM
>>>>> jJe4
>>>>> =YSyj
>>>>> -----END PGP SIGNATURE-----
>>>>> _______________________________________________
>>>>> ceph-users mailing list
>>>>> ceph-users@xxxxxxxxxxxxxx
>>>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>>>
>>>>
>>>>
>>>>
>>>
>>> -----BEGIN PGP SIGNATURE-----
>>> Version: Mailvelope v1.2.0
>>> Comment: https://www.mailvelope.com
>>>
>>> wsFcBAEBCAAQBQJWICJwCRDmVDuy+mK58QAAyTUQALkwOnB++bXto+cM0iSZ
>>> B3nZgvl9FKZnujb0MUIiS29a+Y2nnBpAGgHbF4Y9ngnDQYNZ0yf1DD2wYad2
>>> rll6pYeWRRYSmaBCBfdPlqbbVw8WpjdXLR9FtLFfUR2V+Ghf4U83F8iKiWn1
>>> +6DqouHMA/auHjEr49w+Ue0kpKSfItH/9LkVjYQBKp6E7tyOSsrzcM1milKR
>>> lwsIOewiKvsg4neDLqkdqaO6+bYuaDJmgN+hEqzl7lxbzt5pJbzfknpiAewm
>>> GTw8C2AUbzcYqIhzqWcY9Jiy6ZZkYAPDODsJpkc/Pubnq73jlkllB4JaQpJy
>>> 2964DynNn8jBAI9JJpLyldtKPEofmkumzZ6tPXgLDuo2VuV+hp/wVadZKy2k
>>> PDhms1dpeLFM8NsgOToSpO6Ej1l1857C5+cy3EeTlKqgs6z1QbTwNvUeeCpk
>>> /ORObJQCa7teNEM1c33oEJ3V1LOx7SfsEn1A6PVaaUegmMEEa6Cb8Va2RYl8
>>> 5fhXqIcsU9KWHDmq8+MZ9x67etAucXKJmPQpIzJD6M9WtsWsDupsuJ1MgCKB
>>> pxhqjwujuaZWfF+W3HEuOOP7OcXbj2U3RO1V3HOr9N0cLFTf+vuefIzOtgs1
>>> qdBPrxIUNznfYXarclFuJzCWPzKpDTdKbLwYUcbh9hKayRpll3DGOW7qUX3u
>>> eNXR
>>> =cI+5
>>> -----END PGP SIGNATURE-----
>>> _______________________________________________
>>> ceph-users mailing list
>>> ceph-users@xxxxxxxxxxxxxx
>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>
>
> -----BEGIN PGP SIGNATURE-----
> Version: Mailvelope v1.2.0
> Comment: https://www.mailvelope.com
>
> wsFcBAEBCAAQBQJWIDfDCRDmVDuy+mK58QAA8qkQAIBtEorNvkAwVojMmOcW
> /zEGPw9Hg0OgvoR7gv4DWSKO4y8raek3oL7BNE5WNrpkRkpKfjGe6OLLtTr+
> 9b7K19Cv3oRQHVUG2S+rnwDzsg/4ORL90TZZSh729ThjE823g9PDpB1ThsdD
> DApHvU4OoLEYVepCkxzZx4a8UztyaBnDl8/LCNK7Rzg30UWsiR9kRW4bru5F
> igcFHslBmUSH0trbG0kxA9mrmnWq2m7i0QNVS1nUDJ7crDwqnJrnf17NG7NV
> SQKKsAcuM2lmmAPkLIMy4J1oiBb8JXiCc27Bj+dtBG9Iqh8HdYvvmVd6O8Jv
> bVgMUN7mmGGpuIs040Q3Fn4wSrhtGc5iUpzM5eJnemnrPi5ymE8WayHX6aak
> qA5vfM8WLNKMmPBORqg2DB/1co6OkvHOLAk+ZAUYUo88I+dVp7BIXadaZMhS
> GKbTPfpZgDdn0bHbn4Dyma1a1JVarpQXCaLq4ayvfY7DQuoFVi2eOImxvc+Q
> gFSmmdegK0uto3aTnySR1fRl1Yk9grd+LSwJgmsew4t2AHjAbAYgG1idnvJt
> t5e6Aj4NnNK3f085gkoundV1rrp37lu3Ot82gMq7xyxNmlT/FsAmOFSEelJP
> U26AQHlgDM7oV95IQMnKOtdziIq7NFdspuVuN+umf7JpnuYLbROSREG3dIrq
> qdxB
> =de2k
> -----END PGP SIGNATURE-----
_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
