Il giorno 08 mar 2017, alle ore 00:25, Adrian Saul
>>> ha scritto:
>>>
>>>
>>> Possibly MySQL is doing sync writes, where as your FIO could be doing
>>> buffered writes.
>>>
>>> Try enabling the sync option on fio and compare result
nal Message-
> >> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
> >> Matteo Dacrema
> >> Sent: Wednesday, 8 March 2017 7:52 AM
> >> To: ceph-users
> >> Subject: [ceph-users] MySQL and ceph volumes
> >>
> >&
from
> the application, as it waits for the last write to complete before issuing
> the next one.
>
>
> From: Matteo Dacrema [mailto:mdacr...@enter.eu]
> Sent: Wednesday, 8 March 2017 10:36 AM
> To: Adrian Saul
> Cc: ceph-users
> Subject: Re: [ceph-users] MySQL and ceph vo
]
Sent: Wednesday, 8 March 2017 10:36 AM
To: Adrian Saul
Cc: ceph-users
Subject: Re: [ceph-users] MySQL and ceph volumes
Thank you Adrian!
I’ve forgot this option and I can reproduce the problem.
Now, what could be the problem on ceph side with O_DSYNC writes?
Regards
Matteo
fio and compare results.
>
>
>> -Original Message-
>> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
>> Matteo Dacrema
>> Sent: Wednesday, 8 March 2017 7:52 AM
>> To: ceph-users
>> Subject: [ceph-users] MySQL and ceph volumes
>>
>>
day, 8 March 2017 7:52 AM
> To: ceph-users
> Subject: [ceph-users] MySQL and ceph volumes
>
> Hi All,
>
> I have a galera cluster running on openstack with data on ceph volumes
> capped at 1500 iops for read and write ( 3000 total ).
> I can’t understand why with fio I ca
pth & see what’s your iostat looking, if it’s
same then that’s what your disk can do.
Now if you want to compare ceph RDB perf. Do the same on a normal block device.
--
Deepak
From: Matteo Dacrema [mailto:mdacr...@enter.eu]
Sent: Tuesday, March 07, 2017 1:17 PM
To: Deepak Naidu
Cc: ceph-users
Sub
B & don’t just you the avgrq-sz # ]
>
>
> --
> Deepak
>
>
>
> -Original Message-
> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com
> <mailto:ceph-users-boun...@lists.ceph.com>] On Behalf Of Matteo Dacrema
> Sent: Tuesday, March 07, 2017
h 07, 2017 12:52 PM
To: ceph-users
Subject: [ceph-users] MySQL and ceph volumes
Hi All,
I have a galera cluster running on openstack with data on ceph volumes capped
at 1500 iops for read and write ( 3000 total ).
I can’t understand why with fio I can reach 1500 iops without IOwait and MySQL
Hi All,
I have a galera cluster running on openstack with data on ceph volumes capped
at 1500 iops for read and write ( 3000 total ).
I can’t understand why with fio I can reach 1500 iops without IOwait and MySQL
can reach only 150 iops both read or writes showing 30% of IOwait.
I tried with fi
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