Re: [ceph-users] Bluestore on HDD+SSD sync write latency experiences

Hi Dan, Quoting Dan van der Ster : Hi Nick, Our latency probe results (4kB rados bench) didn't change noticeably after converting a test cluster from FileStore (sata SSD journal) to BlueStore (sata SSD db). Those 4kB writes take 3-4ms on average from a random VM in our

Re: [ceph-users] Bluestore on HDD+SSD sync write latency experiences

Hi Nick, Our latency probe results (4kB rados bench) didn't change noticeably after converting a test cluster from FileStore (sata SSD journal) to BlueStore (sata SSD db). Those 4kB writes take 3-4ms on average from a random VM in our data centre. (So bluestore DB seems equivalent to FileStore

Re: [ceph-users] Bluestore on HDD+SSD sync write latency experiences

Subject: Re: [ceph-users] Bluestore on HDD+SSD sync write latency experiences > > Hi Nick, > > On Tue, May 1, 2018 at 4:50 PM, Nick Fisk <n...@fisk.me.uk> wrote: >> Hi all, >> >> >> >> Slowly getting round to migrating clusters to Bluestore but I am >

Re: [ceph-users] Bluestore on HDD+SSD sync write latency experiences

Hi Nick, On 5/1/2018 11:50 PM, Nick Fisk wrote: Hi all, Slowly getting round to migrating clusters to Bluestore but I am interested in how people are handling the potential change in write latency coming from Filestore? Or maybe nobody is really seeing much difference? As we all know, in

Re: [ceph-users] Bluestore on HDD+SSD sync write latency experiences

-Original Message- From: Alex Gorbachev <a...@iss-integration.com> Sent: 02 May 2018 22:05 To: Nick Fisk <n...@fisk.me.uk> Cc: ceph-users <ceph-users@lists.ceph.com> Subject: Re: [ceph-users] Bluestore on HDD+SSD sync write latency experiences Hi Nick, On Tue, May

Re: [ceph-users] Bluestore on HDD+SSD sync write latency experiences

Hi Nick, On Tue, May 1, 2018 at 4:50 PM, Nick Fisk wrote: > Hi all, > > > > Slowly getting round to migrating clusters to Bluestore but I am interested > in how people are handling the potential change in write latency coming from > Filestore? Or maybe nobody is really seeing

Re: [ceph-users] Bluestore on HDD+SSD sync write latency experiences

Hi Nick, On 5/1/2018 11:50 PM, Nick Fisk wrote: Hi all, Slowly getting round to migrating clusters to Bluestore but I am interested in how people are handling the potential change in write latency coming from Filestore? Or maybe nobody is really seeing much difference? As we all know, in

[ceph-users] Bluestore on HDD+SSD sync write latency experiences

Hi all, Slowly getting round to migrating clusters to Bluestore but I am interested in how people are handling the potential change in write latency coming from Filestore? Or maybe nobody is really seeing much difference? As we all know, in Bluestore, writes are not double written and in