1/3 of your raw data on the osds will be deleted and then it move a bunch around. I haven't done it personally, but I would guess somewhere in the
range of 50-70% data movement. It will depend on how many pgs you have, failure domains (hosts by default), etc.
Sent from my iPhone
> On Oct 23, 2016, at 9:56 AM, Sebastian Köhler <sk@xxxxxxxxx> wrote:
>
> Thanks for the help, is there any information available on how much data
> movement will happen when I reduce the size from 3 to 2? The min_size is
> already at 1.
>
>> On 10/23/2016 05:43 PM, David Turner wrote:
>> Make sure to also adjust your min_size. Having those be the same number
>> can cause issues if and when you lose an osd from your cluster.
>>
>> Like Wido said, you can change the size of a replica pool at any time,
>> it will just cause a lot of data to move.
>>
>> Sent from my iPhone
>>
>>> On Oct 23, 2016, at 4:30 AM, Wido den Hollander <wido@xxxxxxxx> wrote:
>>>
>>>
>>>> Op 23 oktober 2016 om 10:04 schreef Sebastian Köhler <sk@xxxxxxxxx>:
>>>>
>>>>
>>>> Hello,
>>>>
>>>> is it possible to reduce the replica count of a pool that already
>>>> contains data? If it is possible how much load will a change in the
>>>> replica size cause? I am guessing it will do a rebalance.
>>>>
>>>
>>> Yes, just change the 'size' parameter of the pool. Data will rebalance
>> indeed if you increase the number.
>>>
>>> Wido
>>>
>>>> Thanks
>>>>
>>>> Sebastian
>>>>
>>>>
>>
>> ------------------------------------------------------------------------
>>
>> <https://storagecraft.com> David Turner | Cloud Operations Engineer |
>> StorageCraft Technology Corporation <https://storagecraft.com>
>> 380 Data Drive Suite 300 | Draper | Utah | 84020
>> Office: 801.871.2760| Mobile: 385.224.2943
>>
>> ------------------------------------------------------------------------
>>
>> If you are not the intended recipient of this message or received it
>> erroneously, please notify the sender and delete it, together with any
>> attachments, and be advised that any dissemination or copying of this
>> message is prohibited.
>>
>> ------------------------------------------------------------------------
>>
>>
Sent from my iPhone
> On Oct 23, 2016, at 9:56 AM, Sebastian Köhler <sk@xxxxxxxxx> wrote:
>
> Thanks for the help, is there any information available on how much data
> movement will happen when I reduce the size from 3 to 2? The min_size is
> already at 1.
>
>> On 10/23/2016 05:43 PM, David Turner wrote:
>> Make sure to also adjust your min_size. Having those be the same number
>> can cause issues if and when you lose an osd from your cluster.
>>
>> Like Wido said, you can change the size of a replica pool at any time,
>> it will just cause a lot of data to move.
>>
>> Sent from my iPhone
>>
>>> On Oct 23, 2016, at 4:30 AM, Wido den Hollander <wido@xxxxxxxx> wrote:
>>>
>>>
>>>> Op 23 oktober 2016 om 10:04 schreef Sebastian Köhler <sk@xxxxxxxxx>:
>>>>
>>>>
>>>> Hello,
>>>>
>>>> is it possible to reduce the replica count of a pool that already
>>>> contains data? If it is possible how much load will a change in the
>>>> replica size cause? I am guessing it will do a rebalance.
>>>>
>>>
>>> Yes, just change the 'size' parameter of the pool. Data will rebalance
>> indeed if you increase the number.
>>>
>>> Wido
>>>
>>>> Thanks
>>>>
>>>> Sebastian
>>>>
>>>>
>>
>> ------------------------------------------------------------------------
>>
>> <https://storagecraft.com> David Turner | Cloud Operations Engineer |
>> StorageCraft Technology Corporation <https://storagecraft.com>
>> 380 Data Drive Suite 300 | Draper | Utah | 84020
>> Office: 801.871.2760| Mobile: 385.224.2943
>>
>> ------------------------------------------------------------------------
>>
>> If you are not the intended recipient of this message or received it
>> erroneously, please notify the sender and delete it, together with any
>> attachments, and be advised that any dissemination or copying of this
>> message is prohibited.
>>
>> ------------------------------------------------------------------------
>>
>>
 |
David Turner |
Cloud Operations Engineer |
StorageCraft
Technology Corporation 380 Data Drive Suite 300 | Draper | Utah | 84020 Office: 801.871.2760 | Mobile: 385.224.2943 |
| If you are not the intended recipient of this message or received it erroneously, please notify the sender and delete it, together with any attachments, and be advised that any dissemination or copying of this message is prohibited. |
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