Re: [ceph-users] EC Pool and Cache Tier Tuning

2015-03-10 Thread Steffen W Sørensen
ory can't cache as much data as a larger SSD. /Steffen > >> -Original Message- >> From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of >> Steffen Winther >> Sent: 09 March 2015 20:47 >> To: ceph-users@lists.ceph.com >> Sub

Re: [ceph-users] EC Pool and Cache Tier Tuning

2015-03-09 Thread Nick Fisk
be a lot faster using a cache tier if the data resides in it. > -Original Message- > From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of > Steffen Winther > Sent: 09 March 2015 20:47 > To: ceph-users@lists.ceph.com > Subject: Re: [ceph-users] EC Poo

Re: [ceph-users] EC Pool and Cache Tier Tuning

2015-03-09 Thread Steffen Winther
Nick Fisk writes: > My Ceph cluster comprises of 4 Nodes each with the following:- > 10x 3TB WD Red Pro disks - EC pool k=3 m=3 (7200rpm) > 2x S3700 100GB SSD's (20k Write IOPs) for HDD Journals > 1x S3700 400GB SSD (35k Write IOPs) for cache tier - 3x replica If I have following 4x node config:

[ceph-users] EC Pool and Cache Tier Tuning

2015-03-07 Thread Nick Fisk
Hi All, I have been experimenting with EC pools and Cache Tiers to make them more useful for more active data sets on RBD volumes and I thought I would share my findings so far as they have made quite a significant difference. My Ceph cluster comprises of 4 Nodes each with the following:- 12x2.1g