Hello,
Am 04.09.2017 um 20:32 schrieb Stefan Priebe - Profihost AG:
> Am 04.09.2017 um 15:28 schrieb Timofey Titovets:
>> 2017-09-04 15:57 GMT+03:00 Stefan Priebe - Profihost AG
>> :
>>> Am 04.09.2017 um 12:53 schrieb Henk Slager:
On Sun, Sep 3, 2017 at 8:32 PM,
2017-09-04 21:32 GMT+03:00 Stefan Priebe - Profihost AG :
>> May be you can make work your raid setup faster by:
>> 1. Use Single Profile
>
> I'm already using the raid0 profile - see below:
If i understand correctly, you have a very big data set with random RW
access, so:
Am 04.09.2017 um 15:28 schrieb Timofey Titovets:
> 2017-09-04 15:57 GMT+03:00 Stefan Priebe - Profihost AG
> :
>> Am 04.09.2017 um 12:53 schrieb Henk Slager:
>>> On Sun, Sep 3, 2017 at 8:32 PM, Stefan Priebe - Profihost AG
>>> wrote:
Hello,
>>> [ ... ] Currently without any ssds i get the best speed with:
>>> - 4x HW Raid 5 with 1GB controller memory of 4TB 3,5" devices
>>> and using btrfs as raid 0 for data and metadata on top of
>>> those 4 raid 5. [ ... ] the write speed is not as good as i
>>> would like - especially for random
On Monday, 4 September 2017 2:57:18 PM AEST Stefan Priebe - Profihost AG
wrote:
> > Then roughly make sure the complete set of metadata blocks fits in the
> > cache. For an fs of this size let's say/estimate 150G. Then maybe same
> > of double for data, so an SSD of 500G would be a first try.
>
2017-09-04 15:57 GMT+03:00 Stefan Priebe - Profihost AG :
> Am 04.09.2017 um 12:53 schrieb Henk Slager:
>> On Sun, Sep 3, 2017 at 8:32 PM, Stefan Priebe - Profihost AG
>> wrote:
>>> Hello,
>>>
>>> i'm trying to speed up big btrfs volumes.
>>>
>>> Some
Am 04.09.2017 um 12:53 schrieb Henk Slager:
> On Sun, Sep 3, 2017 at 8:32 PM, Stefan Priebe - Profihost AG
> wrote:
>> Hello,
>>
>> i'm trying to speed up big btrfs volumes.
>>
>> Some facts:
>> - Kernel will be 4.13-rc7
>> - needed volume size is 60TB
>>
>> Currently
>> [ ... ] Currently the write speed is not as good as i would
>> like - especially for random 8k-16k I/O. [ ... ]
> [ ... ] So this 60TB is then 20 4TB disks or so and the 4x 1GB
> cache is simply not very helpful I think. The working set
> doesn't fit in it I guess. If there is mostly single or
On Sun, Sep 3, 2017 at 8:32 PM, Stefan Priebe - Profihost AG
wrote:
> Hello,
>
> i'm trying to speed up big btrfs volumes.
>
> Some facts:
> - Kernel will be 4.13-rc7
> - needed volume size is 60TB
>
> Currently without any ssds i get the best speed with:
> - 4x HW Raid 5
> [ ... ] - needed volume size is 60TB
I wonder how long that takes to 'scrub', 'balance', 'check',
'subvolume delete', 'find', etc.
> [ ... ] 4x HW Raid 5 with 1GB controller memory of 4TB 3,5"
> devices and using btrfs as raid 0 for data and metadata on top
> of those 4 raid 5. [ ... ] the
Hello,
i'm trying to speed up big btrfs volumes.
Some facts:
- Kernel will be 4.13-rc7
- needed volume size is 60TB
Currently without any ssds i get the best speed with:
- 4x HW Raid 5 with 1GB controller memory of 4TB 3,5" devices
and using btrfs as raid 0 for data and metadata on top of
11 matches
Mail list logo