Den sön 28 jan. 2024 kl 23:02 skrev Adrian Sevcenco :
>
> >> is it wrong to think of PGs like a kind of object bucket (S3 like)?
> >
> > Mostly, yes.
> so .. in a PG there are no "file data" but pieces of "file data"?
> so 100 GB file with 2x replication will be placed in more than 2 PGs?
> Is
>
> so .. in a PG there are no "file data" but pieces of "file data"?
Yes. Chapter 8 may help here, but be warned, it’s pretty dense and may confuse
more than help.
The foundation layer of Ceph is RADOS — services including block (RBD), file
(CephFS), and object (RGW) storage are built on
Original Message
Subject: [ceph-users] crushmap rules :: host selection
From: Anthony D'Atri
To: Adrian Sevcenco
Date: 1/28/2024, 11:34:00 PM
so it depends on failure domain .. but with host failure domain, if there is
space on some other OSDs
will the missing OSDs be
>
>>> so it depends on failure domain .. but with host failure domain, if there
>>> is space on some other OSDs
>>> will the missing OSDs be "healed" on the available space on some other OSDs?
>> Yes, if you have enough hosts. When using 3x replication it is thus
>> advantageous to have at
Original Message
Subject: [ceph-users] Re: crushmap rules :: host selection
From: Anthony D'Atri
To: Adrian Sevcenco
Date: 1/28/2024, 6:03:21 PM
First a all, thanks a lot for for info and taking time to help
a beginner :)
Nichts zu denken. This is a community, it’s what
>> Oh! so the device class is more like an arbitrary label not a immutable
>> defined property!
>> looking at
>> https://docs.ceph.com/en/reef/rados/operations/crush-map/#device-classes
>> this is not specified …
"By default, OSDs automatically set their class at startup to hdd, ssd, or
>
> First a all, thanks a lot for for info and taking time to help
> a beginner :)
Nichts zu denken. This is a community, it’s what we do. Next year you’ll
help someone else.
>>>
> Oh! so the device class is more like an arbitrary label not a immutable
> defined property!
> looking at
Original Message
Subject: [ceph-users] crushmap rules :: host selection
From: Anthony D'Atri
To: Adrian Sevcenco
Date: 1/28/2024, 3:56:21 AM
First a all, thanks a lot for for info and taking time to help
a beginner :)
Pools are a logical name for a storage space but how
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