Re: [ceph-users] cephfs cache tiering - hitset

2017-03-23 Thread Nick Fisk
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Mike Lovell Sent: 20 March 2017 22:31 To: n...@fisk.me.uk Cc: Webert de Souza Lima ; ceph-users Subject: Re: [ceph-users] cephfs cache tiering - hitset On Mon, Mar 20, 2017 at 4:20 PM, Nick Fisk mailto:n

Re: [ceph-users] cephfs cache tiering - hitset

2017-03-20 Thread Mike Lovell
t; To: Webert de Souza Lima > > Cc: ceph-users > > Subject: Re: [ceph-users] cephfs cache tiering - hitset > > > > i'm not an expert but here is my understanding of it. a hit_set keeps > track of > > whether or not an object was accessed during the timespan

Re: [ceph-users] cephfs cache tiering - hitset

2017-03-20 Thread Nick Fisk
Just a few corrections, hope you don't mind > -Original Message- > From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of > Mike Lovell > Sent: 20 March 2017 20:30 > To: Webert de Souza Lima > Cc: ceph-users > Subject: Re: [ceph-users] cep

Re: [ceph-users] cephfs cache tiering - hitset

2017-03-20 Thread Mike Lovell
i'm not an expert but here is my understanding of it. a hit_set keeps track of whether or not an object was accessed during the timespan of the hit_set. for example, if you have a hit_set_period of 600, then the hit_set covers a period of 10 minutes. the hit_set_count defines how many of the hit_se

[ceph-users] cephfs cache tiering - hitset

2017-03-17 Thread Webert de Souza Lima
Hello everyone, I`m deploying a ceph cluster with cephfs and I`d like to tune ceph cache tiering, and I`m a little bit confused of the settings hit_set_count, hit_set_period and min_read_recency_for_promote. The docs are very lean and I can`f find any more detailed explanation anywhere. Could som