Re: [ceph-users] SSDs for journals vs SSDs for a cache tier, which is better?

Hello, On Wed, 16 Mar 2016 16:22:06 + Stephen Harker wrote: > On 2016-02-17 11:07, Christian Balzer wrote: > > > > On Wed, 17 Feb 2016 10:04:11 +0100 Piotr Wachowicz wrote: > > > >> > > Let's consider both cases: > >> > > Journals on SSDs - for writes, the write operation returns right >

Re: [ceph-users] Is there an api to list all s3 user

Hi Php aws sdk with personal updates can do that. First, you need a functionnal php_aws_sdk with your radosgw and an account (access/secret key) with metadata caps. I use aws Version 2.8.22 : $aws = Aws::factory('config.php'); $this->s3client = $aws->get('s3');

Re: [ceph-users] DONTNEED fadvise flag

On Wed, Mar 16, 2016 at 9:46 AM, Kenneth Waegeman wrote: > Hi all, > > Quick question: Does cephFS pass the fadvise DONTNEED flag and take it into > account? > I want to use the --drop-cache option of rsync 3.1.1 to not fill the cache > when rsyncing to cephFS It looks

[ceph-users] ZFS or BTRFS for performance?

Insofar as I've been able to tell, both BTRFS and ZFS provide similar capabilities back to CEPH, and both are sufficiently stable for the basic CEPH use case (Single disk -> single mount point), so the question becomes this: Which actually provides better performance? Which is the more highly

Re: [ceph-users] [cephfs] About feature 'snapshot'

On Thu, Mar 17, 2016 at 1:41 PM, Gregory Farnum wrote: > On Thu, Mar 17, 2016 at 3:49 AM, John Spray wrote: >> Snapshots are disabled by default: >> http://docs.ceph.com/docs/hammer/cephfs/early-adopters/#most-stable-configuration > > Which makes me wonder

Re: [ceph-users] data corruption with hammer

This tracker ticket happened to go by my eyes today: http://tracker.ceph.com/issues/12814 . There isn't a lot of detail there but the headline matches. -Greg On Wed, Mar 16, 2016 at 2:02 AM, Nick Fisk wrote: > > >> -Original Message- >> From: ceph-users

Re: [ceph-users] Local SSD cache for ceph on each compute node.

I’d rather like to see this implemented at the hypervisor level, i.e.: QEMU, so we can have a common layer for all the storage backends. Although this is less portable... > On 17 Mar 2016, at 11:00, Nick Fisk wrote: > > > >> -Original Message- >> From: ceph-users

[ceph-users] cephfs infernalis (ceph version 9.2.1) - bonnie++

Hi! Trying to run bonnie++ on cephfs mounted via the kernel driver on a centos 7.2.1511 machine resulted in: # bonnie++ -r 128 -u root -d /data/cephtest/bonnie2/ Using uid:0, gid:0. Writing a byte at a time...done Writing intelligently...done Rewriting...done Reading a byte at a time...done

[ceph-users] RGW quota

Hi, We have a user with a 50GB quota and has now a single bucket with 20GB of files. They had previous buckets created and removed but the quota has not decreased. I understand that we do garbage collection but it has been significantly longer than the defaults that we have not overridden.

Re: [ceph-users] inconsistent PG -> unfound objects on an erasure coded system

Thanks Sam. Since I have prepared a script for this, I decided to go ahead with the checks.(patience isn't one of my extended attributes) I've got a file that searches the full erasure encoded spaces and does your checklist below. I have operated only on one PG so far, the 70.459

Re: [ceph-users] ZFS or BTRFS for performance?

Hi, Le 18/03/2016 20:58, Mark Nelson a écrit : > FWIW, from purely a performance perspective Ceph usually looks pretty > fantastic on a fresh BTRFS filesystem. In fact it will probably > continue to look great until you do small random writes to large > objects (like say to blocks in an RBD

Re: [ceph-users] [cephfs] About feature 'snapshot'

Snapshots are disabled by default in Jewel as well. Depending on user feedback about what's most important, we hope to have them ready for Kraken or the L release (but we'll see). -Greg On Friday, March 18, 2016, 施柏安 wrote: > Hi John, > Really thank you for your help,