Re: multiple journals on SSD

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Hi Vincent,

On 12.07.2016 15:03, Vincent Godin wrote:
> Hello.
>
> I've been testing Intel 3500 as journal store for few HDD-based OSD. I
> stumble on issues with multiple partitions (>4) and UDEV (sda5, sda6,etc
> sometime do not appear after partition creation). And I'm thinking that
> partition is not that useful for OSD management, because linux do no
> allow partition rereading with it contains used volumes.
>
> So my question: How you store many journals on SSD? My initial thoughts:
>
> 1)  filesystem with filebased journals
> 2) LVM with volumes
1+2 has an performance impact.
I do an trick and use partition labels for the journal.
[osd]
osd_journal = /dev/disk/by-partlabel/journal-$id

Due this i'm independed from linux device-naming.


Udo
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