[pve-devel] ceph performance

[Alexandre DERUMIER]

>>Ignore me, debian sq
>>(sueeze already supports syncfs! 
Are you sure ?

http://comments.gmane.org/gmane.comp.file-systems.ceph.devel/6648

libc6 < 2.14 or kernel < 2.6.39 don't have support for syncfs.

(and wheezy use libc6 2.13....)

or maybe new kernel is enough ?

I'll verify that today, they are a log in ceph-osd.log which say if syncfs is available.

----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Dietmar Maurer" <dietmar at proxmox.com>, pve-devel at pve.proxmox.com 
Envoyé: Dimanche 4 Novembre 2012 16:33:19 
Objet: Re: [pve-devel] ceph performance 

Ignore me, debian squeeze already supports syncfs! 

> 
> I guess we do not have syncfs support in our libc: 
> 
> http://ceph.com/docs/master/install/os-recommendations/ 
> 
> But the RHEL6.3 kernel includes that syscall. Can we compile ceph using the 
> syscall directly? 
> 
> Maybe that is the reason for the bad performance? 
> 
> - Dietmar 

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